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Updated all GPS and Galileo trackings for double floating point internal

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computations and bug fixes in the carrier phase accumulator.
(all, except Matlab-Simulink linked trackings)
This commit is contained in:
Javier Arribas 2015-11-26 18:44:04 +01:00
parent 19e1328fda
commit c8f7e08127
26 changed files with 460 additions and 431 deletions
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41
CMakeLists.txt
View File

@ -733,8 +733,8 @@ if(NOT ARMADILLO_FOUND)
message(STATUS " Armadillo will be downloaded and built automatically ")
message(STATUS " when doing 'make'. ")
set(armadillo_RELEASE 5.200.2)
set(armadillo_MD5 "ef57ba4c473a3b67c672441a7face09e")
set(armadillo_RELEASE 6.200.2)
set(armadillo_MD5 "e07910be1a79b20fa2efe1006a274390")
ExternalProject_Add(
armadillo-${armadillo_RELEASE}
@ -781,12 +781,32 @@ endif(NOT ARMADILLO_FOUND)
# GnuTLS - http://www.gnutls.org/
################################################################################
find_package(GnuTLS)
if(NOT GNUTLS_FOUND)
message(" The GnuTLS library has not been found.")
message(" You can try to install it by typing:")
find_library(GNUTLS_OPENSSL_LIBRARY NAMES gnutls-openssl libgnutls-openssl.so.27
HINTS /usr/lib
/usr/lib64
/usr/local/lib
/usr/local/lib64
/opt/local/lib
/usr/lib/x86_64-linux-gnu
/usr/lib/aarch64-linux-gnu
/usr/lib/arm-linux-gnueabihf
/usr/lib/arm-linux-gnueabi
/usr/lib/i386-linux-gnu
)
if(NOT GNUTLS_OPENSSL_LIBRARY)
message(STATUS "Looking for OpenSSL instead...")
find_package(OpenSSL)
if(OPENSSL_FOUND)
set(GNUTLS_INCLUDE_DIR ${OPENSSL_INCLUDE_DIR})
set(GNUTLS_LIBRARIES "")
set(GNUTLS_OPENSSL_LIBRARY ${OPENSSL_SSL_LIBRARY})
else(OPENSSL_FOUND)
message(" The GnuTLS library with openssl compatibility enabled has not been found.")
message(" You can try to install the required libraries by typing:")
if(OS_IS_LINUX)
if(${LINUX_DISTRIBUTION} MATCHES "Fedora" OR ${LINUX_DISTRIBUTION} MATCHES "Red Hat")
message(" sudo yum install libgnutls-openssl-devel")
message(" sudo yum install openssl-devel")
else(${LINUX_DISTRIBUTION} MATCHES "Fedora" OR ${LINUX_DISTRIBUTION} MATCHES "Red Hat")
message(" sudo apt-get install libgnutls-openssl-dev")
endif(${LINUX_DISTRIBUTION} MATCHES "Fedora" OR ${LINUX_DISTRIBUTION} MATCHES "Red Hat")
@ -794,8 +814,9 @@ if(NOT GNUTLS_FOUND)
if(OS_IS_MACOSX)
message(" sudo port install gnutls")
endif(OS_IS_MACOSX)
message(FATAL_ERROR "GnuTLS libraries are required to build gnss-sdr")
endif(NOT GNUTLS_FOUND)
message(FATAL_ERROR "GnuTLS libraries with openssl compatibility are required to build gnss-sdr")
endif(OPENSSL_FOUND)
endif(NOT GNUTLS_OPENSSL_LIBRARY)
################################################################################
@ -1085,9 +1106,9 @@ endif(ENABLE_GPROF)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${MY_CXX_FLAGS}")
if(OS_IS_LINUX)
if(${LINUX_DISTRIBUTION} MATCHES "Fedora" OR ${LINUX_DISTRIBUTION} MATCHES "openSUSE")
if(${LINUX_DISTRIBUTION} MATCHES "Fedora" OR ${LINUX_DISTRIBUTION} MATCHES "openSUSE" OR ${LINUX_DISTRIBUTION} MATCHES "ArchLinux")
link_libraries(pthread)
endif(${LINUX_DISTRIBUTION} MATCHES "Fedora" OR ${LINUX_DISTRIBUTION} MATCHES "openSUSE")
endif(${LINUX_DISTRIBUTION} MATCHES "Fedora" OR ${LINUX_DISTRIBUTION} MATCHES "openSUSE" OR ${LINUX_DISTRIBUTION} MATCHES "ArchLinux")
endif(OS_IS_LINUX)

12
conf/gnss-sdr_Hybrid_byte_sim.conf
View File

@ -7,7 +7,7 @@
;######### GLOBAL OPTIONS ##################
;internal_fs_hz: Internal signal sampling frequency after the signal conditioning stage [Hz].
GNSS-SDR.internal_fs_hz=2600000
GNSS-SDR.internal_fs_hz=4000000
;######### CONTROL_THREAD CONFIG ############
ControlThread.wait_for_flowgraph=false
@ -23,7 +23,7 @@ SignalSource.filename=/home/javier/ClionProjects/gnss-sim/build/signal_out.bin
SignalSource.item_type=byte
;#sampling_frequency: Original Signal sampling frequency in [Hz]
SignalSource.sampling_frequency=2600000
SignalSource.sampling_frequency=4000000
;#freq: RF front-end center frequency in [Hz]
SignalSource.freq=1575420000
@ -127,7 +127,7 @@ InputFilter.grid_density=16
;#The following options are used only in Freq_Xlating_Fir_Filter implementation.
;#InputFilter.IF is the intermediate frequency (in Hz) shifted down to zero Hz
InputFilter.sampling_frequency=2600000
InputFilter.sampling_frequency=4000000
InputFilter.IF=0
@ -150,10 +150,10 @@ Resampler.dump_filename=../data/resampler.dat
Resampler.item_type=gr_complex
;#sample_freq_in: the sample frequency of the input signal
Resampler.sample_freq_in=2600000
Resampler.sample_freq_in=4000000
;#sample_freq_out: the desired sample frequency of the output signal
Resampler.sample_freq_out=2600000
Resampler.sample_freq_out=4000000
;######### CHANNELS GLOBAL CONFIG ############
@ -253,7 +253,7 @@ Tracking_1C.pll_bw_hz=15.0;
Tracking_1C.dll_bw_hz=1.5;
;#fll_bw_hz: FLL loop filter bandwidth [Hz]
Tracking_1C.fll_bw_hz=10.0;
Tracking_1C.fll_bw_hz=2.0;
;#order: PLL/DLL loop filter order [2] or [3]
Tracking_1C.order=3;

43
src/algorithms/observables/gnuradio_blocks/gps_l1_ca_observables_cc.cc
View File

@ -211,7 +211,6 @@ int gps_l1_ca_observables_cc::general_work (int noutput_items, gr_vector_int &ni
acc_phase_vec_rads=arma::vec(std::vector<double>(d_acc_carrier_phase_queue_rads[gnss_synchro_iter->second.Channel_ID].begin(), d_acc_carrier_phase_queue_rads[gnss_synchro_iter->second.Channel_ID].end()));
dopper_vec_hz=arma::vec(std::vector<double>(d_carrier_doppler_queue_hz[gnss_synchro_iter->second.Channel_ID].begin(), d_carrier_doppler_queue_hz[gnss_synchro_iter->second.Channel_ID].end()));
//std::cout<<"symbol_TOW_vec_s[0]="<<symbol_TOW_vec_s[0]<<std::endl;
//std::cout<<"symbol_TOW_vec_s[GPS_L1_CA_HISTORY_DEEP-1]="<<symbol_TOW_vec_s[GPS_L1_CA_HISTORY_DEEP-1]<<std::endl;
//std::cout<<"acc_phase_vec_rads="<<acc_phase_vec_rads<<std::endl;
@ -223,52 +222,22 @@ int gps_l1_ca_observables_cc::general_work (int noutput_items, gr_vector_int &ni
// arma::interp1(symbol_TOW_vec_s,dopper_vec_hz,desired_symbol_TOW,dopper_vec_interp_hz);
// arma::interp1(symbol_TOW_vec_s,acc_phase_vec_rads,desired_symbol_TOW,acc_phase_vec_interp_rads);
// linear regression
// Curve fitting to cuadratic function
arma::mat A=arma::ones<arma::mat> (GPS_L1_CA_HISTORY_DEEP,2);
A.col(1)=symbol_TOW_vec_s;
arma::mat coef_acc_phase(1,2);
//A.col(2)=symbol_TOW_vec_s % symbol_TOW_vec_s;
arma::mat coef_acc_phase(1,3);
coef_acc_phase=arma::pinv(A.t()*A)*A.t()*acc_phase_vec_rads;
arma::mat coef_doppler(1,2);
arma::mat coef_doppler(1,3);
coef_doppler=arma::pinv(A.t()*A)*A.t()*dopper_vec_hz;
arma::vec acc_phase_lin;
arma::vec carrier_doppler_lin;
acc_phase_lin=coef_acc_phase[0]+coef_acc_phase[1]*desired_symbol_TOW[0];
carrier_doppler_lin=coef_doppler[0]+coef_doppler[1]*desired_symbol_TOW[0];
acc_phase_lin=coef_acc_phase[0]+coef_acc_phase[1]*desired_symbol_TOW[0];//+coef_acc_phase[2]*desired_symbol_TOW[0]*desired_symbol_TOW[0];
carrier_doppler_lin=coef_doppler[0]+coef_doppler[1]*desired_symbol_TOW[0];//+coef_doppler[2]*desired_symbol_TOW[0]*desired_symbol_TOW[0];
//std::cout<<"acc_phase_vec_interp_rads="<<acc_phase_vec_interp_rads[0]<<std::endl;
//std::cout<<"dopper_vec_interp_hz="<<dopper_vec_interp_hz[0]<<std::endl;
// if (std::isnan(acc_phase_vec_interp_rads[0]) != true and std::isnan(dopper_vec_interp_hz[0]) != true)
// {
current_gnss_synchro[gnss_synchro_iter->second.Channel_ID].Carrier_phase_rads =acc_phase_lin[0];
current_gnss_synchro[gnss_synchro_iter->second.Channel_ID].Carrier_Doppler_hz =carrier_doppler_lin[0];
// }else{
// std::cout<<"NaN detected in interpolation output, desired_symbol_TOW[0]= "<<desired_symbol_TOW[0]<<std::endl;
// std::cout<<"symbol_TOW_vec_s[0]="<<symbol_TOW_vec_s[0]<<std::endl;
// std::cout<<"symbol_TOW_vec_s[GPS_L1_CA_HISTORY_DEEP-1]="<<symbol_TOW_vec_s[GPS_L1_CA_HISTORY_DEEP-1]<<std::endl;
//
// for (int n=0;n<symbol_TOW_vec_s.size();n++)
// {
// if (std::isnan(symbol_TOW_vec_s[n])==true)
// {
// std::cout<<"NaN detected in symbol_TOW_vec_s index "<<n<<std::endl;
// //std::cout<<"symbol_TOW_vec_s="<<symbol_TOW_vec_s<<std::endl;
// //std::cout<<"acc_phase_vec_rads="<<acc_phase_vec_rads<<std::endl;
// }
// if (std::isnan(dopper_vec_hz[n])==true)
// {
// std::cout<<"NaN detected in dopper_vec_hz index "<<n<<std::endl;
// //std::cout<<"symbol_TOW_vec_s="<<symbol_TOW_vec_s<<std::endl;
// //std::cout<<"acc_phase_vec_rads="<<acc_phase_vec_rads<<std::endl;
// }
// if (std::isnan(acc_phase_vec_rads[n])==true)
// {
// std::cout<<"NaN detected in acc_phase_vec_rads index "<<n<<std::endl;
// //std::cout<<"symbol_TOW_vec_s="<<symbol_TOW_vec_s<<std::endl;
// //std::cout<<"acc_phase_vec_rads="<<acc_phase_vec_rads<<std::endl;
// }
// }
//
// }
}
}

9
src/algorithms/tracking/gnuradio_blocks/CMakeLists.txt
View File

@ -18,8 +18,9 @@
if(ENABLE_CUDA)
FIND_PACKAGE(CUDA REQUIRED)
set(OPT_TRACKING_BLOCKS ${OPT_TRACKING_BLOCKS} gps_l1_ca_dll_pll_tracking_gpu_cc.cc)
set(OPT_TRACKING_INCLUDES ${OPT_TRACKING_INCLUDES} ${CUDA_INCLUDE_DIRS})
set(OPT_TRACKING_LIBRARIES ${OPT_TRACKING_LIBRARIES} ${CUDA_LIBRARIES})
endif(ENABLE_CUDA)
set(TRACKING_GR_BLOCKS_SOURCES
@ -48,8 +49,7 @@ include_directories(
${Boost_INCLUDE_DIRS}
${GNURADIO_RUNTIME_INCLUDE_DIRS}
${VOLK_GNSSSDR_INCLUDE_DIRS}
${CUDA_INCLUDE_DIRS}
# ${CMAKE_SOURCE_DIR}/src/algorithms/tracking/libs/cudahelpers
${OPT_TRACKING_INCLUDES}
)
if(ENABLE_GENERIC_ARCH)
@ -60,7 +60,8 @@ file(GLOB TRACKING_GR_BLOCKS_HEADERS "*.h")
add_library(tracking_gr_blocks ${TRACKING_GR_BLOCKS_SOURCES} ${TRACKING_GR_BLOCKS_HEADERS})
source_group(Headers FILES ${TRACKING_GR_BLOCKS_HEADERS})
target_link_libraries(tracking_gr_blocks tracking_lib ${GNURADIO_RUNTIME_LIBRARIES} gnss_sp_libs ${Boost_LIBRARIES} ${VOLK_GNSSSDR_LIBRARIES} ${ORC_LIBRARIES} ${CUDA_LIBRARIES})
target_link_libraries(tracking_gr_blocks tracking_lib ${GNURADIO_RUNTIME_LIBRARIES} gnss_sp_libs ${Boost_LIBRARIES} ${VOLK_GNSSSDR_LIBRARIES} ${ORC_LIBRARIES} ${OPT_TRACKING_LIBRARIES})
if(NOT VOLK_GNSSSDR_FOUND)
add_dependencies(tracking_gr_blocks volk_gnsssdr_module)
endif(NOT VOLK_GNSSSDR_FOUND)

61
src/algorithms/tracking/gnuradio_blocks/galileo_e1_dll_pll_veml_tracking_cc.cc
View File

@ -236,7 +236,7 @@ void galileo_e1_dll_pll_veml_tracking_cc::start_tracking()
void galileo_e1_dll_pll_veml_tracking_cc::update_local_code()
{
double tcode_half_chips;
float rem_code_phase_half_chips;
double rem_code_phase_half_chips;
int associated_chip_index;
int code_length_half_chips = static_cast<int>(Galileo_E1_B_CODE_LENGTH_CHIPS) * 2;
double code_phase_step_chips;
@ -246,11 +246,11 @@ void galileo_e1_dll_pll_veml_tracking_cc::update_local_code()
int epl_loop_length_samples;
// unified loop for VE, E, P, L, VL code vectors
code_phase_step_chips = (static_cast<double>(d_code_freq_chips)) / (static_cast<double>(d_fs_in));
code_phase_step_half_chips = (2.0 * static_cast<double>(d_code_freq_chips)) / (static_cast<double>(d_fs_in));
code_phase_step_chips = d_code_freq_chips / (static_cast<double>(d_fs_in));
code_phase_step_half_chips = (2.0 * d_code_freq_chips) / (static_cast<double>(d_fs_in));
rem_code_phase_half_chips = d_rem_code_phase_samples * (2*d_code_freq_chips / d_fs_in);
tcode_half_chips = - static_cast<double>(rem_code_phase_half_chips);
tcode_half_chips = - rem_code_phase_half_chips;
early_late_spc_samples = round(d_early_late_spc_chips / code_phase_step_chips);
very_early_late_spc_samples = round(d_very_early_late_spc_chips / code_phase_step_chips);
@ -310,10 +310,14 @@ galileo_e1_dll_pll_veml_tracking_cc::~galileo_e1_dll_pll_veml_tracking_cc()
int galileo_e1_dll_pll_veml_tracking_cc::general_work (int noutput_items,gr_vector_int &ninput_items,
gr_vector_const_void_star &input_items, gr_vector_void_star &output_items)
{
float carr_error_hz;
float carr_error_filt_hz;
float code_error_chips;
float code_error_filt_chips;
double carr_error_hz;
carr_error_hz=0.0;
double carr_error_filt_hz;
carr_error_filt_hz=0.0;
double code_error_chips;
code_error_chips=0.0;
double code_error_filt_chips;
code_error_filt_chips=0.0;
if (d_enable_tracking == true)
{
@ -323,7 +327,7 @@ int galileo_e1_dll_pll_veml_tracking_cc::general_work (int noutput_items,gr_vect
* Signal alignment (skip samples until the incoming signal is aligned with local replica)
*/
int samples_offset;
float acq_trk_shif_correction_samples;
double acq_trk_shif_correction_samples;
int acq_to_trk_delay_samples;
acq_to_trk_delay_samples = d_sample_counter - d_acq_sample_stamp;
acq_trk_shif_correction_samples = d_current_prn_length_samples - fmod(static_cast<float>(acq_to_trk_delay_samples), static_cast<float>(d_current_prn_length_samples));
@ -372,7 +376,7 @@ int galileo_e1_dll_pll_veml_tracking_cc::general_work (int noutput_items,gr_vect
// New code Doppler frequency estimation
d_code_freq_chips = Galileo_E1_CODE_CHIP_RATE_HZ + ((d_carrier_doppler_hz * Galileo_E1_CODE_CHIP_RATE_HZ) / Galileo_E1_FREQ_HZ);
//carrier phase accumulator for (K) Doppler estimation
d_acc_carrier_phase_rad = d_acc_carrier_phase_rad + GPS_TWO_PI * d_carrier_doppler_hz * Galileo_E1_CODE_PERIOD;
d_acc_carrier_phase_rad -= GPS_TWO_PI * d_carrier_doppler_hz * Galileo_E1_CODE_PERIOD;
//remnant carrier phase to prevent overflow in the code NCO
d_rem_carr_phase_rad = d_rem_carr_phase_rad + GPS_TWO_PI * d_carrier_doppler_hz * Galileo_E1_CODE_PERIOD;
d_rem_carr_phase_rad = fmod(d_rem_carr_phase_rad, GPS_TWO_PI);
@ -383,7 +387,7 @@ int galileo_e1_dll_pll_veml_tracking_cc::general_work (int noutput_items,gr_vect
// Code discriminator filter
code_error_filt_chips = d_code_loop_filter.get_code_nco(code_error_chips); //[chips/second]
//Code phase accumulator
float code_error_filt_secs;
double code_error_filt_secs;
code_error_filt_secs = (Galileo_E1_CODE_PERIOD * code_error_filt_chips) / Galileo_E1_CODE_CHIP_RATE_HZ; //[seconds]
//code_error_filt_secs=T_prn_seconds*code_error_filt_chips*T_chip_seconds*static_cast<float>(d_fs_in); //[seconds]
d_acc_code_phase_secs = d_acc_code_phase_secs + code_error_filt_secs;
@ -395,7 +399,7 @@ int galileo_e1_dll_pll_veml_tracking_cc::general_work (int noutput_items,gr_vect
double T_prn_samples;
double K_blk_samples;
// Compute the next buffer lenght based in the new period of the PRN sequence and the code phase error estimation
T_chip_seconds = 1 / static_cast<double>(d_code_freq_chips);
T_chip_seconds = 1.0 / d_code_freq_chips;
T_prn_seconds = T_chip_seconds * Galileo_E1_B_CODE_LENGTH_CHIPS;
T_prn_samples = T_prn_seconds * static_cast<double>(d_fs_in);
K_blk_samples = T_prn_samples + d_rem_code_phase_samples + code_error_filt_secs * static_cast<double>(d_fs_in);
@ -460,9 +464,9 @@ int galileo_e1_dll_pll_veml_tracking_cc::general_work (int noutput_items,gr_vect
// This tracking block aligns the Tracking_timestamp_secs with the start sample of the PRN, thus, Code_phase_secs=0
current_synchro_data.Code_phase_secs = 0;
current_synchro_data.Carrier_phase_rads = static_cast<double>(d_acc_carrier_phase_rad);
current_synchro_data.Carrier_Doppler_hz = static_cast<double>(d_carrier_doppler_hz);
current_synchro_data.CN0_dB_hz = static_cast<double>(d_CN0_SNV_dB_Hz);
current_synchro_data.Carrier_phase_rads = d_acc_carrier_phase_rad;
current_synchro_data.Carrier_Doppler_hz = d_carrier_doppler_hz;
current_synchro_data.CN0_dB_hz = d_CN0_SNV_dB_Hz;
current_synchro_data.Flag_valid_pseudorange = false;
*out[0] = current_synchro_data;
@ -547,19 +551,28 @@ int galileo_e1_dll_pll_veml_tracking_cc::general_work (int noutput_items,gr_vect
// PRN start sample stamp
d_dump_file.write(reinterpret_cast<char*>(&d_sample_counter), sizeof(unsigned long int));
// accumulated carrier phase
d_dump_file.write(reinterpret_cast<char*>(&d_acc_carrier_phase_rad), sizeof(float));
tmp_float=d_acc_carrier_phase_rad;
d_dump_file.write(reinterpret_cast<char*>(&tmp_float), sizeof(float));
// carrier and code frequency
d_dump_file.write(reinterpret_cast<char*>(&d_carrier_doppler_hz), sizeof(float));
d_dump_file.write(reinterpret_cast<char*>(&d_code_freq_chips), sizeof(float));
tmp_float=d_carrier_doppler_hz;
d_dump_file.write(reinterpret_cast<char*>(&tmp_float), sizeof(float));
tmp_float=d_code_freq_chips;
d_dump_file.write(reinterpret_cast<char*>(&tmp_float), sizeof(float));
//PLL commands
d_dump_file.write(reinterpret_cast<char*>(&carr_error_hz), sizeof(float));
d_dump_file.write(reinterpret_cast<char*>(&carr_error_filt_hz), sizeof(float));
tmp_float=carr_error_hz;
d_dump_file.write(reinterpret_cast<char*>(&tmp_float), sizeof(float));
tmp_float=carr_error_filt_hz;
d_dump_file.write(reinterpret_cast<char*>(&tmp_float), sizeof(float));
//DLL commands
d_dump_file.write(reinterpret_cast<char*>(&code_error_chips), sizeof(float));
d_dump_file.write(reinterpret_cast<char*>(&code_error_filt_chips), sizeof(float));
tmp_float=code_error_chips;
d_dump_file.write(reinterpret_cast<char*>(&tmp_float), sizeof(float));
tmp_float=code_error_filt_chips;
d_dump_file.write(reinterpret_cast<char*>(&tmp_float), sizeof(float));
// CN0 and carrier lock test
d_dump_file.write(reinterpret_cast<char*>(&d_CN0_SNV_dB_Hz), sizeof(float));
d_dump_file.write(reinterpret_cast<char*>(&d_carrier_lock_test), sizeof(float));
tmp_float=d_CN0_SNV_dB_Hz;
d_dump_file.write(reinterpret_cast<char*>(&tmp_float), sizeof(float));
tmp_float=d_carrier_lock_test;
d_dump_file.write(reinterpret_cast<char*>(&tmp_float), sizeof(float));
// AUX vars (for debug purposes)
tmp_float = d_rem_code_phase_samples;
d_dump_file.write(reinterpret_cast<char*>(&tmp_float), sizeof(float));

18
src/algorithms/tracking/gnuradio_blocks/galileo_e1_dll_pll_veml_tracking_cc.h
View File

@ -126,8 +126,8 @@ private:
long d_if_freq;
long d_fs_in;
float d_early_late_spc_chips;
float d_very_early_late_spc_chips;
double d_early_late_spc_chips;
double d_very_early_late_spc_chips;
gr_complex* d_ca_code;
@ -146,22 +146,22 @@ private:
// remaining code phase and carrier phase between tracking loops
double d_rem_code_phase_samples;
float d_rem_carr_phase_rad;
double d_rem_carr_phase_rad;
// PLL and DLL filter library
Tracking_2nd_DLL_filter d_code_loop_filter;
Tracking_2nd_PLL_filter d_carrier_loop_filter;
// acquisition
float d_acq_code_phase_samples;
float d_acq_carrier_doppler_hz;
double d_acq_code_phase_samples;
double d_acq_carrier_doppler_hz;
// correlator
Correlator d_correlator;
// tracking vars
double d_code_freq_chips;
float d_carrier_doppler_hz;
double d_carrier_doppler_hz;
double d_acc_carrier_phase_rad;
double d_acc_code_phase_secs;
@ -175,9 +175,9 @@ private:
// CN0 estimation and lock detector
int d_cn0_estimation_counter;
gr_complex* d_Prompt_buffer;
float d_carrier_lock_test;
float d_CN0_SNV_dB_Hz;
float d_carrier_lock_threshold;
double d_carrier_lock_test;
double d_CN0_SNV_dB_Hz;
double d_carrier_lock_threshold;
int d_carrier_lock_fail_counter;
// control vars

2
src/algorithms/tracking/gnuradio_blocks/galileo_e1_tcp_connector_tracking_cc.cc
View File

@ -387,7 +387,7 @@ int Galileo_E1_Tcp_Connector_Tracking_cc::general_work (int noutput_items, gr_ve
// New code Doppler frequency estimation
d_code_freq_chips = Galileo_E1_CODE_CHIP_RATE_HZ + ((d_carrier_doppler_hz * Galileo_E1_CODE_CHIP_RATE_HZ) / Galileo_E1_FREQ_HZ);
//carrier phase accumulator for (K) doppler estimation
d_acc_carrier_phase_rad = d_acc_carrier_phase_rad + GPS_TWO_PI*d_carrier_doppler_hz*Galileo_E1_CODE_PERIOD;
d_acc_carrier_phase_rad -= GPS_TWO_PI*d_carrier_doppler_hz*Galileo_E1_CODE_PERIOD;
//remnant carrier phase to prevent overflow in the code NCO
d_rem_carr_phase_rad = d_rem_carr_phase_rad + GPS_TWO_PI*d_carrier_doppler_hz*Galileo_E1_CODE_PERIOD;
d_rem_carr_phase_rad = fmod(d_rem_carr_phase_rad, GPS_TWO_PI);

77
src/algorithms/tracking/gnuradio_blocks/galileo_e5a_dll_pll_tracking_cc.cc
View File

@ -217,18 +217,18 @@ void Galileo_E5a_Dll_Pll_Tracking_cc::start_tracking()
d_acq_sample_stamp = d_acquisition_gnss_synchro->Acq_samplestamp_samples;
long int acq_trk_diff_samples;
float acq_trk_diff_seconds;
double acq_trk_diff_seconds;
acq_trk_diff_samples = static_cast<long int>(d_sample_counter) - static_cast<long int>(d_acq_sample_stamp);//-d_vector_length;
LOG(INFO) << "Number of samples between Acquisition and Tracking =" << acq_trk_diff_samples;
acq_trk_diff_seconds = static_cast<float>(acq_trk_diff_samples) / static_cast<float>(d_fs_in);
//doppler effect
// Fd=(C/(C+Vr))*F
float radial_velocity;
double radial_velocity;
radial_velocity = (Galileo_E5a_FREQ_HZ + d_acq_carrier_doppler_hz)/Galileo_E5a_FREQ_HZ;
// new chip and prn sequence periods based on acq Doppler
float T_chip_mod_seconds;
float T_prn_mod_seconds;
float T_prn_mod_samples;
double T_chip_mod_seconds;
double T_prn_mod_seconds;
double T_prn_mod_samples;
d_code_freq_chips = radial_velocity * Galileo_E5a_CODE_CHIP_RATE_HZ;
T_chip_mod_seconds = 1/d_code_freq_chips;
T_prn_mod_seconds = T_chip_mod_seconds * Galileo_E5a_CODE_LENGTH_CHIPS;
@ -236,13 +236,13 @@ void Galileo_E5a_Dll_Pll_Tracking_cc::start_tracking()
d_current_prn_length_samples = round(T_prn_mod_samples);
float T_prn_true_seconds = Galileo_E5a_CODE_LENGTH_CHIPS / Galileo_E5a_CODE_CHIP_RATE_HZ;
float T_prn_true_samples = T_prn_true_seconds * static_cast<float>(d_fs_in);
float T_prn_diff_seconds;
double T_prn_true_seconds = Galileo_E5a_CODE_LENGTH_CHIPS / Galileo_E5a_CODE_CHIP_RATE_HZ;
double T_prn_true_samples = T_prn_true_seconds * static_cast<float>(d_fs_in);
double T_prn_diff_seconds;
T_prn_diff_seconds = T_prn_true_seconds - T_prn_mod_seconds;
float N_prn_diff;
double N_prn_diff;
N_prn_diff = acq_trk_diff_seconds / T_prn_true_seconds;
float corrected_acq_phase_samples, delay_correction_samples;
double corrected_acq_phase_samples, delay_correction_samples;
corrected_acq_phase_samples = fmod((d_acq_code_phase_samples + T_prn_diff_seconds * N_prn_diff * static_cast<float>(d_fs_in)), T_prn_true_samples);
if (corrected_acq_phase_samples < 0)
{
@ -358,7 +358,7 @@ void Galileo_E5a_Dll_Pll_Tracking_cc::update_local_code()
int epl_loop_length_samples;
// unified loop for E, P, L code vectors
code_phase_step_chips = static_cast<double>(d_code_freq_chips) / static_cast<double>(d_fs_in);
code_phase_step_chips = d_code_freq_chips / static_cast<double>(d_fs_in);
rem_code_phase_chips = d_rem_code_phase_samples * (d_code_freq_chips / d_fs_in);
tcode_chips = -rem_code_phase_chips;
@ -383,7 +383,7 @@ void Galileo_E5a_Dll_Pll_Tracking_cc::update_local_code()
void Galileo_E5a_Dll_Pll_Tracking_cc::update_local_carrier()
{
float sin_f, cos_f;
float phase_step_rad = static_cast<float>(2 * GALILEO_PI) * d_carrier_doppler_hz / static_cast<float>(d_fs_in);
float phase_step_rad = static_cast<float>(2.0 * GALILEO_PI * d_carrier_doppler_hz / static_cast<double>(d_fs_in));
int phase_step_rad_i = gr::fxpt::float_to_fixed(phase_step_rad);
int phase_rad_i = gr::fxpt::float_to_fixed(d_rem_carr_phase_rad);
@ -400,10 +400,10 @@ int Galileo_E5a_Dll_Pll_Tracking_cc::general_work (int noutput_items, gr_vector_
gr_vector_const_void_star &input_items, gr_vector_void_star &output_items)
{
// process vars
float carr_error_hz;
float carr_error_filt_hz;
float code_error_chips;
float code_error_filt_chips;
double carr_error_hz;
double carr_error_filt_hz;
double code_error_chips;
double code_error_filt_chips;
// GNSS_SYNCHRO OBJECT to interchange data between tracking->telemetry_decoder
Gnss_Synchro **out = (Gnss_Synchro **) &output_items[0]; //block output streams pointer
@ -451,7 +451,7 @@ int Galileo_E5a_Dll_Pll_Tracking_cc::general_work (int noutput_items, gr_vector_
case 1:
{
int samples_offset;
float acq_trk_shif_correction_samples;
double acq_trk_shif_correction_samples;
int acq_to_trk_delay_samples;
acq_to_trk_delay_samples = d_sample_counter - d_acq_sample_stamp;
acq_trk_shif_correction_samples = d_current_prn_length_samples - fmod(static_cast<float>(acq_to_trk_delay_samples), static_cast<float>(d_current_prn_length_samples));
@ -561,11 +561,11 @@ int Galileo_E5a_Dll_Pll_Tracking_cc::general_work (int noutput_items, gr_vector_
{
if (d_secondary_lock == true)
{
carr_error_hz = pll_four_quadrant_atan(d_Prompt) / static_cast<float>(GALILEO_PI) * 2;
carr_error_hz = pll_four_quadrant_atan(d_Prompt) / GALILEO_PI * 2.0;
}
else
{
carr_error_hz = pll_cloop_two_quadrant_atan(d_Prompt) / static_cast<float>(GALILEO_PI) * 2;
carr_error_hz = pll_cloop_two_quadrant_atan(d_Prompt) / GALILEO_PI * 2.0;
}
// Carrier discriminator filter
@ -576,10 +576,10 @@ int Galileo_E5a_Dll_Pll_Tracking_cc::general_work (int noutput_items, gr_vector_
d_code_freq_chips = Galileo_E5a_CODE_CHIP_RATE_HZ + ((d_carrier_doppler_hz * Galileo_E5a_CODE_CHIP_RATE_HZ) / Galileo_E5a_FREQ_HZ);
}
//carrier phase accumulator for (K) doppler estimation
d_acc_carrier_phase_rad = d_acc_carrier_phase_rad + 2*GALILEO_PI * d_carrier_doppler_hz * GALILEO_E5a_CODE_PERIOD;
d_acc_carrier_phase_rad -= 2*GALILEO_PI * d_carrier_doppler_hz * GALILEO_E5a_CODE_PERIOD;
//remanent carrier phase to prevent overflow in the code NCO
d_rem_carr_phase_rad = d_rem_carr_phase_rad + 2*GALILEO_PI * d_carrier_doppler_hz * GALILEO_E5a_CODE_PERIOD;
d_rem_carr_phase_rad = fmod(d_rem_carr_phase_rad, 2*GALILEO_PI);
d_rem_carr_phase_rad = d_rem_carr_phase_rad + 2.0*GALILEO_PI * d_carrier_doppler_hz * GALILEO_E5a_CODE_PERIOD;
d_rem_carr_phase_rad = fmod(d_rem_carr_phase_rad, 2.0*GALILEO_PI);
// ################## DLL ##########################################################
if (d_integration_counter == d_current_ti_ms)
@ -600,7 +600,7 @@ int Galileo_E5a_Dll_Pll_Tracking_cc::general_work (int noutput_items, gr_vector_
double T_prn_samples;
double K_blk_samples;
// Compute the next buffer length based in the new period of the PRN sequence and the code phase error estimation
T_chip_seconds = 1 / static_cast<double>(d_code_freq_chips);
T_chip_seconds = 1.0 / d_code_freq_chips;
T_prn_seconds = T_chip_seconds * Galileo_E5a_CODE_LENGTH_CHIPS;
T_prn_samples = T_prn_seconds * static_cast<double>(d_fs_in);
K_blk_samples = T_prn_samples + d_rem_code_phase_samples + d_code_error_filt_secs * static_cast<double>(d_fs_in);
@ -694,9 +694,9 @@ int Galileo_E5a_Dll_Pll_Tracking_cc::general_work (int noutput_items, gr_vector_
current_synchro_data.Tracking_timestamp_secs = (static_cast<double>(d_sample_counter) + static_cast<double>(d_current_prn_length_samples) + static_cast<double>(d_rem_code_phase_samples)) / static_cast<double>(d_fs_in);
// This tracking block aligns the Tracking_timestamp_secs with the start sample of the PRN, thus, Code_phase_secs=0
current_synchro_data.Code_phase_secs = 0;
current_synchro_data.Carrier_phase_rads = static_cast<double>(d_acc_carrier_phase_rad);
current_synchro_data.Carrier_Doppler_hz = static_cast<double>(d_carrier_doppler_hz);
current_synchro_data.CN0_dB_hz = static_cast<double>(d_CN0_SNV_dB_Hz);
current_synchro_data.Carrier_phase_rads = d_acc_carrier_phase_rad;
current_synchro_data.Carrier_Doppler_hz = d_carrier_doppler_hz;
current_synchro_data.CN0_dB_hz = d_CN0_SNV_dB_Hz;
current_synchro_data.Flag_valid_tracking = false;
@ -781,6 +781,7 @@ int Galileo_E5a_Dll_Pll_Tracking_cc::general_work (int noutput_items, gr_vector_
}
try
{
// EPR
d_dump_file.write(reinterpret_cast<char*>(&tmp_E), sizeof(float));
d_dump_file.write(reinterpret_cast<char*>(&tmp_P), sizeof(float));
@ -789,31 +790,33 @@ int Galileo_E5a_Dll_Pll_Tracking_cc::general_work (int noutput_items, gr_vector_
d_dump_file.write(reinterpret_cast<char*>(&prompt_I), sizeof(float));
d_dump_file.write(reinterpret_cast<char*>(&prompt_Q), sizeof(float));
// PRN start sample stamp
//tmp_float=(float)d_sample_counter;
d_dump_file.write(reinterpret_cast<char*>(&d_sample_counter), sizeof(unsigned long int));
// accumulated carrier phase
d_dump_file.write(reinterpret_cast<char*>(&d_acc_carrier_phase_rad), sizeof(float));
d_dump_file.write(reinterpret_cast<char*>(&d_acc_carrier_phase_rad), sizeof(double));
// carrier and code frequency
d_dump_file.write(reinterpret_cast<char*>(&d_carrier_doppler_hz), sizeof(float));
d_dump_file.write(reinterpret_cast<char*>(&d_code_freq_chips), sizeof(float));
d_dump_file.write(reinterpret_cast<char*>(&d_carrier_doppler_hz), sizeof(double));
d_dump_file.write(reinterpret_cast<char*>(&d_code_freq_chips), sizeof(double));
//PLL commands
d_dump_file.write(reinterpret_cast<char*>(&carr_error_hz), sizeof(float));
d_dump_file.write(reinterpret_cast<char*>(&carr_error_filt_hz), sizeof(float));
d_dump_file.write(reinterpret_cast<char*>(&carr_error_hz), sizeof(double));
d_dump_file.write(reinterpret_cast<char*>(&carr_error_filt_hz), sizeof(double));
//DLL commands
d_dump_file.write(reinterpret_cast<char*>(&code_error_chips), sizeof(float));
d_dump_file.write(reinterpret_cast<char*>(&code_error_filt_chips), sizeof(float));
d_dump_file.write(reinterpret_cast<char*>(&code_error_chips), sizeof(double));
d_dump_file.write(reinterpret_cast<char*>(&code_error_filt_chips), sizeof(double));
// CN0 and carrier lock test
d_dump_file.write(reinterpret_cast<char*>(&d_CN0_SNV_dB_Hz), sizeof(float));
d_dump_file.write(reinterpret_cast<char*>(&d_carrier_lock_test), sizeof(float));
d_dump_file.write(reinterpret_cast<char*>(&d_CN0_SNV_dB_Hz), sizeof(double));
d_dump_file.write(reinterpret_cast<char*>(&d_carrier_lock_test), sizeof(double));
// AUX vars (for debug purposes)
tmp_float = d_rem_code_phase_samples;
d_dump_file.write(reinterpret_cast<char*>(&tmp_float), sizeof(float));
tmp_double = d_rem_code_phase_samples;
d_dump_file.write(reinterpret_cast<char*>(&tmp_double), sizeof(double));
tmp_double = static_cast<double>(d_sample_counter + d_current_prn_length_samples);
d_dump_file.write(reinterpret_cast<char*>(&tmp_double), sizeof(double));
}
catch (std::ifstream::failure e)
{

34
src/algorithms/tracking/gnuradio_blocks/galileo_e5a_dll_pll_tracking_cc.h
View File

@ -137,10 +137,10 @@ private:
long d_fs_in;
double d_early_late_spc_chips;
float d_dll_bw_hz;
float d_pll_bw_hz;
float d_dll_bw_init_hz;
float d_pll_bw_init_hz;
double d_dll_bw_hz;
double d_pll_bw_hz;
double d_dll_bw_init_hz;
double d_pll_bw_init_hz;
gr_complex* d_codeQ;
gr_complex* d_codeI;
@ -160,26 +160,26 @@ private:
float tmp_P;
float tmp_L;
// remaining code phase and carrier phase between tracking loops
float d_rem_code_phase_samples;
float d_rem_carr_phase_rad;
double d_rem_code_phase_samples;
double d_rem_carr_phase_rad;
// PLL and DLL filter library
Tracking_2nd_DLL_filter d_code_loop_filter;
Tracking_2nd_PLL_filter d_carrier_loop_filter;
// acquisition
float d_acq_code_phase_samples;
float d_acq_carrier_doppler_hz;
double d_acq_code_phase_samples;
double d_acq_carrier_doppler_hz;
// correlator
Correlator d_correlator;
// tracking vars
float d_code_freq_chips;
float d_carrier_doppler_hz;
float d_acc_carrier_phase_rad;
float d_code_phase_samples;
float d_acc_code_phase_secs;
float d_code_error_filt_secs;
double d_code_freq_chips;
double d_carrier_doppler_hz;
double d_acc_carrier_phase_rad;
double d_code_phase_samples;
double d_acc_code_phase_secs;
double d_code_error_filt_secs;
//PRN period in samples
int d_current_prn_length_samples;
@ -191,9 +191,9 @@ private:
// CN0 estimation and lock detector
int d_cn0_estimation_counter;
gr_complex* d_Prompt_buffer;
float d_carrier_lock_test;
float d_CN0_SNV_dB_Hz;
float d_carrier_lock_threshold;
double d_carrier_lock_test;
double d_CN0_SNV_dB_Hz;
double d_carrier_lock_threshold;
int d_carrier_lock_fail_counter;
// control vars

61
src/algorithms/tracking/gnuradio_blocks/galileo_volk_e1_dll_pll_veml_tracking_cc.cc
View File

@ -253,7 +253,7 @@ void galileo_volk_e1_dll_pll_veml_tracking_cc::start_tracking()
void galileo_volk_e1_dll_pll_veml_tracking_cc::update_local_code()
{
double tcode_half_chips;
float rem_code_phase_half_chips;
double rem_code_phase_half_chips;
int code_length_half_chips = static_cast<int>(Galileo_E1_B_CODE_LENGTH_CHIPS) * 2;
double code_phase_step_chips;
double code_phase_step_half_chips;
@ -262,11 +262,11 @@ void galileo_volk_e1_dll_pll_veml_tracking_cc::update_local_code()
int epl_loop_length_samples;
// unified loop for VE, E, P, L, VL code vectors
code_phase_step_chips = (static_cast<double>(d_code_freq_chips)) / (static_cast<double>(d_fs_in));
code_phase_step_half_chips = (2.0 * static_cast<double>(d_code_freq_chips)) / (static_cast<double>(d_fs_in));
code_phase_step_chips = (d_code_freq_chips) / (static_cast<double>(d_fs_in));
code_phase_step_half_chips = (2.0 * d_code_freq_chips) / (static_cast<double>(d_fs_in));
rem_code_phase_half_chips = d_rem_code_phase_samples * (2*d_code_freq_chips / d_fs_in);
tcode_half_chips = - static_cast<double>(rem_code_phase_half_chips);
tcode_half_chips = - rem_code_phase_half_chips;
early_late_spc_samples = round(d_early_late_spc_chips / code_phase_step_chips);
very_early_late_spc_samples = round(d_very_early_late_spc_chips / code_phase_step_chips);
@ -287,9 +287,9 @@ void galileo_volk_e1_dll_pll_veml_tracking_cc::update_local_carrier()
{
float phase_rad, phase_step_rad;
// Compute the carrier phase step for the K-1 carrier doppler estimation
phase_step_rad = static_cast<float>(GPS_TWO_PI) * d_carrier_doppler_hz / static_cast<float>(d_fs_in);
phase_step_rad = static_cast<float> (GPS_TWO_PI * d_carrier_doppler_hz / static_cast<double>(d_fs_in));
// Initialize the carrier phase with the remanent carrier phase of the K-2 loop
phase_rad = d_rem_carr_phase_rad;
phase_rad = static_cast<float> (d_rem_carr_phase_rad);
//HERE YOU CAN CHOOSE THE DESIRED VOLK IMPLEMENTATION
//volk_gnsssdr_s32f_x2_update_local_carrier_32fc_manual(d_carr_sign, phase_rad, phase_step_rad, d_current_prn_length_samples, "generic");
@ -340,10 +340,10 @@ galileo_volk_e1_dll_pll_veml_tracking_cc::~galileo_volk_e1_dll_pll_veml_tracking
int galileo_volk_e1_dll_pll_veml_tracking_cc::general_work (int noutput_items,gr_vector_int &ninput_items,
gr_vector_const_void_star &input_items, gr_vector_void_star &output_items)
{
float carr_error_hz;
float carr_error_filt_hz;
float code_error_chips;
float code_error_filt_chips;
double carr_error_hz;
double carr_error_filt_hz;
double code_error_chips;
double code_error_filt_chips;
if (d_enable_tracking == true)
{
@ -353,7 +353,7 @@ int galileo_volk_e1_dll_pll_veml_tracking_cc::general_work (int noutput_items,gr
* Signal alignment (skip samples until the incoming signal is aligned with local replica)
*/
int samples_offset;
float acq_trk_shif_correction_samples;
double acq_trk_shif_correction_samples;
int acq_to_trk_delay_samples;
acq_to_trk_delay_samples = d_sample_counter - d_acq_sample_stamp;
acq_trk_shif_correction_samples = d_current_prn_length_samples - fmod(static_cast<float>(acq_to_trk_delay_samples), static_cast<float>(d_current_prn_length_samples));
@ -419,7 +419,7 @@ int galileo_volk_e1_dll_pll_veml_tracking_cc::general_work (int noutput_items,gr
// New code Doppler frequency estimation
d_code_freq_chips = Galileo_E1_CODE_CHIP_RATE_HZ + ((d_carrier_doppler_hz * Galileo_E1_CODE_CHIP_RATE_HZ) / Galileo_E1_FREQ_HZ);
//carrier phase accumulator for (K) Doppler estimation
d_acc_carrier_phase_rad = d_acc_carrier_phase_rad + GPS_TWO_PI * d_carrier_doppler_hz * Galileo_E1_CODE_PERIOD;
d_acc_carrier_phase_rad -= GPS_TWO_PI * d_carrier_doppler_hz * Galileo_E1_CODE_PERIOD;
//remnant carrier phase to prevent overflow in the code NCO
d_rem_carr_phase_rad = d_rem_carr_phase_rad + GPS_TWO_PI * d_carrier_doppler_hz * Galileo_E1_CODE_PERIOD;
d_rem_carr_phase_rad = fmod(d_rem_carr_phase_rad, GPS_TWO_PI);
@ -430,7 +430,7 @@ int galileo_volk_e1_dll_pll_veml_tracking_cc::general_work (int noutput_items,gr
// Code discriminator filter
code_error_filt_chips = d_code_loop_filter.get_code_nco(code_error_chips); //[chips/second]
//Code phase accumulator
float code_error_filt_secs;
double code_error_filt_secs;
code_error_filt_secs = (Galileo_E1_CODE_PERIOD * code_error_filt_chips) / Galileo_E1_CODE_CHIP_RATE_HZ; //[seconds]
//code_error_filt_secs=T_prn_seconds*code_error_filt_chips*T_chip_seconds*static_cast<float>(d_fs_in); //[seconds]
d_acc_code_phase_secs = d_acc_code_phase_secs + code_error_filt_secs;
@ -442,7 +442,7 @@ int galileo_volk_e1_dll_pll_veml_tracking_cc::general_work (int noutput_items,gr
double T_prn_samples;
double K_blk_samples;
// Compute the next buffer lenght based in the new period of the PRN sequence and the code phase error estimation
T_chip_seconds = 1 / static_cast<double>(d_code_freq_chips);
T_chip_seconds = 1.0 / d_code_freq_chips;
T_prn_seconds = T_chip_seconds * Galileo_E1_B_CODE_LENGTH_CHIPS;
T_prn_samples = T_prn_seconds * static_cast<double>(d_fs_in);
K_blk_samples = T_prn_samples + d_rem_code_phase_samples + code_error_filt_secs * static_cast<double>(d_fs_in);
@ -507,9 +507,9 @@ int galileo_volk_e1_dll_pll_veml_tracking_cc::general_work (int noutput_items,gr
// This tracking block aligns the Tracking_timestamp_secs with the start sample of the PRN, thus, Code_phase_secs=0
current_synchro_data.Code_phase_secs = 0;
current_synchro_data.Carrier_phase_rads = static_cast<double>(d_acc_carrier_phase_rad);
current_synchro_data.Carrier_Doppler_hz = static_cast<double>(d_carrier_doppler_hz);
current_synchro_data.CN0_dB_hz = static_cast<double>(d_CN0_SNV_dB_Hz);
current_synchro_data.Carrier_phase_rads = d_acc_carrier_phase_rad;
current_synchro_data.Carrier_Doppler_hz = d_carrier_doppler_hz;
current_synchro_data.CN0_dB_hz = d_CN0_SNV_dB_Hz;
current_synchro_data.Flag_valid_pseudorange = false;
*out[0] = current_synchro_data;
@ -594,19 +594,28 @@ int galileo_volk_e1_dll_pll_veml_tracking_cc::general_work (int noutput_items,gr
// PRN start sample stamp
d_dump_file.write(reinterpret_cast<char*>(&d_sample_counter), sizeof(unsigned long int));
// accumulated carrier phase
d_dump_file.write(reinterpret_cast<char*>(&d_acc_carrier_phase_rad), sizeof(float));
tmp_float=d_acc_carrier_phase_rad;
d_dump_file.write(reinterpret_cast<char*>(&tmp_float), sizeof(float));
// carrier and code frequency
d_dump_file.write(reinterpret_cast<char*>(&d_carrier_doppler_hz), sizeof(float));
d_dump_file.write(reinterpret_cast<char*>(&d_code_freq_chips), sizeof(float));
tmp_float=d_carrier_doppler_hz;
d_dump_file.write(reinterpret_cast<char*>(&tmp_float), sizeof(float));
tmp_float=d_code_freq_chips;
d_dump_file.write(reinterpret_cast<char*>(&tmp_float), sizeof(float));
//PLL commands
d_dump_file.write(reinterpret_cast<char*>(&carr_error_hz), sizeof(float));
d_dump_file.write(reinterpret_cast<char*>(&carr_error_filt_hz), sizeof(float));
tmp_float=carr_error_hz;
d_dump_file.write(reinterpret_cast<char*>(&tmp_float), sizeof(float));
tmp_float=carr_error_filt_hz;
d_dump_file.write(reinterpret_cast<char*>(&tmp_float), sizeof(float));
//DLL commands
d_dump_file.write(reinterpret_cast<char*>(&code_error_chips), sizeof(float));
d_dump_file.write(reinterpret_cast<char*>(&code_error_filt_chips), sizeof(float));
tmp_float=code_error_chips;
d_dump_file.write(reinterpret_cast<char*>(&tmp_float), sizeof(float));
tmp_float=code_error_filt_chips;
d_dump_file.write(reinterpret_cast<char*>(&tmp_float), sizeof(float));
// CN0 and carrier lock test
d_dump_file.write(reinterpret_cast<char*>(&d_CN0_SNV_dB_Hz), sizeof(float));
d_dump_file.write(reinterpret_cast<char*>(&d_carrier_lock_test), sizeof(float));
tmp_float=d_CN0_SNV_dB_Hz;
d_dump_file.write(reinterpret_cast<char*>(&tmp_float), sizeof(float));
tmp_float=d_carrier_lock_test;
d_dump_file.write(reinterpret_cast<char*>(&tmp_float), sizeof(float));
// AUX vars (for debug purposes)
tmp_float = d_rem_code_phase_samples;
d_dump_file.write(reinterpret_cast<char*>(&tmp_float), sizeof(float));

18
src/algorithms/tracking/gnuradio_blocks/galileo_volk_e1_dll_pll_veml_tracking_cc.h
View File

@ -126,8 +126,8 @@ private:
long d_if_freq;
long d_fs_in;
float d_early_late_spc_chips;
float d_very_early_late_spc_chips;
double d_early_late_spc_chips;
double d_very_early_late_spc_chips;
gr_complex* d_ca_code;
@ -162,22 +162,22 @@ private:
// remaining code phase and carrier phase between tracking loops
double d_rem_code_phase_samples;
float d_rem_carr_phase_rad;
double d_rem_carr_phase_rad;
// PLL and DLL filter library
Tracking_2nd_DLL_filter d_code_loop_filter;
Tracking_2nd_PLL_filter d_carrier_loop_filter;
// acquisition
float d_acq_code_phase_samples;
float d_acq_carrier_doppler_hz;
double d_acq_code_phase_samples;
double d_acq_carrier_doppler_hz;
// correlator
Correlator d_correlator;
// tracking vars
double d_code_freq_chips;
float d_carrier_doppler_hz;
double d_carrier_doppler_hz;
double d_acc_carrier_phase_rad;
double d_acc_code_phase_secs;
@ -191,9 +191,9 @@ private:
// CN0 estimation and lock detector
int d_cn0_estimation_counter;
gr_complex* d_Prompt_buffer;
float d_carrier_lock_test;
float d_CN0_SNV_dB_Hz;
float d_carrier_lock_threshold;
double d_carrier_lock_test;
double d_CN0_SNV_dB_Hz;
double d_carrier_lock_threshold;
int d_carrier_lock_fail_counter;
// control vars

9
src/algorithms/tracking/gnuradio_blocks/gps_l1_ca_dll_fll_pll_tracking_cc.cc
View File

@ -315,7 +315,7 @@ void Gps_L1_Ca_Dll_Fll_Pll_Tracking_cc::update_local_carrier()
phase += phase_step;
}
d_rem_carr_phase = fmod(phase, GPS_TWO_PI);
d_acc_carrier_phase_rad = d_acc_carrier_phase_rad + phase;
d_acc_carrier_phase_rad -= d_acc_carrier_phase_rad + phase;
}
@ -439,6 +439,7 @@ int Gps_L1_Ca_Dll_Fll_Pll_Tracking_cc::general_work (int noutput_items, gr_vecto
if (d_FLL_wait == 1)
{
d_Prompt_prev = *d_Prompt;
d_FLL_discriminator_hz=0.0;
d_FLL_wait = 0;
}
else
@ -454,7 +455,7 @@ int Gps_L1_Ca_Dll_Fll_Pll_Tracking_cc::general_work (int noutput_items, gr_vecto
/*
* DLL and FLL+PLL filter and get current carrier Doppler and code frequency
*/
carr_nco_hz = d_carrier_loop_filter.get_carrier_error(0.0, PLL_discriminator_hz, GPS_L1_CA_CODE_PERIOD);
carr_nco_hz = d_carrier_loop_filter.get_carrier_error(d_FLL_discriminator_hz, PLL_discriminator_hz, correlation_time_s);
d_carrier_doppler_hz = d_if_freq + carr_nco_hz;
d_code_freq_hz = GPS_L1_CA_CODE_RATE_HZ + (((d_carrier_doppler_hz + d_if_freq) * GPS_L1_CA_CODE_RATE_HZ) / GPS_L1_FREQ_HZ);
@ -528,9 +529,7 @@ int Gps_L1_Ca_Dll_Fll_Pll_Tracking_cc::general_work (int noutput_items, gr_vecto
double T_prn_samples;
double K_blk_samples;
T_chip_seconds = 1 / static_cast<double>(d_code_freq_hz);
T_chip_seconds=GPS_L1_CA_CHIP_PERIOD;
//T_prn_seconds = T_chip_seconds * GPS_L1_CA_CODE_LENGTH_CHIPS;
T_prn_seconds = GPS_L1_CA_CODE_PERIOD;
T_prn_seconds = T_chip_seconds * GPS_L1_CA_CODE_LENGTH_CHIPS;
T_prn_samples = T_prn_seconds * d_fs_in;
float code_error_filt_samples;

47
src/algorithms/tracking/gnuradio_blocks/gps_l1_ca_dll_pll_artemisa_tracking_cc.cc
View File

@ -102,7 +102,7 @@ gps_l1_ca_dll_pll_artemisa_tracking_cc::gps_l1_ca_dll_pll_artemisa_tracking_cc(
d_fs_in = fs_in;
d_vector_length = vector_length;
d_dump_filename = dump_filename;
d_current_prn_length_samples = static_cast<int>(d_vector_length);
d_correlation_length_samples = static_cast<int>(d_vector_length);
// Initialize tracking ==========================================
d_code_loop_filter.set_DLL_BW(dll_bw_hz);
@ -128,7 +128,7 @@ gps_l1_ca_dll_pll_artemisa_tracking_cc::gps_l1_ca_dll_pll_artemisa_tracking_cc(
d_local_code_shift_chips[1]=0.0;
d_local_code_shift_chips[2]=d_early_late_spc_chips;
multicorrelator_cpu.init(2*d_current_prn_length_samples,d_n_correlator_taps);
multicorrelator_cpu.init(2*d_correlation_length_samples,d_n_correlator_taps);
//--- Perform initializations ------------------------------
// define initial code frequency basis of NCO
@ -202,7 +202,7 @@ void gps_l1_ca_dll_pll_artemisa_tracking_cc::start_tracking()
T_prn_mod_seconds = T_chip_mod_seconds * GPS_L1_CA_CODE_LENGTH_CHIPS;
T_prn_mod_samples = T_prn_mod_seconds * static_cast<double>(d_fs_in);
d_current_prn_length_samples = round(T_prn_mod_samples);
d_correlation_length_samples = round(T_prn_mod_samples);
double T_prn_true_seconds = GPS_L1_CA_CODE_LENGTH_CHIPS / GPS_L1_CA_CODE_RATE_HZ;
double T_prn_true_samples = T_prn_true_seconds * static_cast<double>(d_fs_in);
@ -291,6 +291,7 @@ int gps_l1_ca_dll_pll_artemisa_tracking_cc::general_work (int noutput_items, gr_
double code_error_filt_chips=0.0;
double code_error_filt_secs_Ti=0.0;
double CURRENT_INTEGRATION_TIME_S;
double CORRECTED_INTEGRATION_TIME_S;
double dll_code_error_secs_Ti=0.0;
double carr_phase_error_secs_Ti=0.0;
double old_d_rem_code_phase_samples;
@ -303,9 +304,9 @@ int gps_l1_ca_dll_pll_artemisa_tracking_cc::general_work (int noutput_items, gr_
double acq_trk_shif_correction_samples;
int acq_to_trk_delay_samples;
acq_to_trk_delay_samples = d_sample_counter - d_acq_sample_stamp;
acq_trk_shif_correction_samples = d_current_prn_length_samples - fmod(static_cast<double>(acq_to_trk_delay_samples), static_cast<double>(d_current_prn_length_samples));
acq_trk_shif_correction_samples = d_correlation_length_samples - fmod(static_cast<double>(acq_to_trk_delay_samples), static_cast<double>(d_correlation_length_samples));
samples_offset = round(d_acq_code_phase_samples + acq_trk_shif_correction_samples);
d_sample_counter = d_sample_counter + samples_offset; //count for the processed samples
d_sample_counter += samples_offset; //count for the processed samples
d_pull_in = false;
// Fill the acquisition data
current_synchro_data = *d_acquisition_gnss_synchro;
@ -320,16 +321,10 @@ int gps_l1_ca_dll_pll_artemisa_tracking_cc::general_work (int noutput_items, gr_
// ################# CARRIER WIPEOFF AND CORRELATORS ##############################
// perform carrier wipe-off and compute Early, Prompt and Late correlation
multicorrelator_cpu.set_input_output_vectors(d_correlator_outs,in);
multicorrelator_cpu.Carrier_wipeoff_multicorrelator_resampler(d_rem_carrier_phase_rad,d_carrier_phase_step_rad,d_rem_code_phase_chips,d_code_phase_step_chips,d_current_prn_length_samples);
multicorrelator_cpu.Carrier_wipeoff_multicorrelator_resampler(d_rem_carrier_phase_rad,d_carrier_phase_step_rad,d_rem_code_phase_chips,d_code_phase_step_chips,d_correlation_length_samples);
// UPDATE INTEGRATION TIME
CURRENT_INTEGRATION_TIME_S=(static_cast<double>(d_current_prn_length_samples)/static_cast<double>(d_fs_in));
// UPDATE REMNANT CARRIER PHASE
//remnant carrier phase [rad]
d_rem_carrier_phase_rad = fmod(d_rem_carrier_phase_rad + GPS_TWO_PI * d_carrier_doppler_hz * CURRENT_INTEGRATION_TIME_S,GPS_TWO_PI);
// UPDATE CARRIER PHASE ACCUULATOR
//carrier phase accumulator prior to update the PLL estimators (accumulated carrier in this loop depends on the old estimations!)
d_acc_carrier_phase_cycles -= d_carrier_doppler_hz*CURRENT_INTEGRATION_TIME_S;
CURRENT_INTEGRATION_TIME_S=(static_cast<double>(d_correlation_length_samples)/static_cast<double>(d_fs_in));
// ################## PLL ##########################################################
// Update PLL discriminator [rads/Ti -> Secs/Ti]
@ -351,7 +346,8 @@ int gps_l1_ca_dll_pll_artemisa_tracking_cc::general_work (int noutput_items, gr_
code_error_filt_chips = d_code_loop_filter.get_code_nco(code_error_chips_Ti); //input [chips/Ti] -> output [chips/second]
code_error_filt_secs_Ti = code_error_filt_chips*CURRENT_INTEGRATION_TIME_S/d_code_freq_chips; // [s/Ti]
// DLL code error estimation [s/Ti]
dll_code_error_secs_Ti=-code_error_filt_secs_Ti+d_pll_to_dll_assist_secs_Ti;
// TODO: PLL carrier aid to DLL is disabled. Re-enable it and measure performance
dll_code_error_secs_Ti=-code_error_filt_secs_Ti;//+d_pll_to_dll_assist_secs_Ti;
// ################## CARRIER AND CODE NCO BUFFER ALIGNEMENT #######################
// keep alignment parameters for the next input buffer
@ -364,9 +360,20 @@ int gps_l1_ca_dll_pll_artemisa_tracking_cc::general_work (int noutput_items, gr_
T_prn_seconds = T_chip_seconds * GPS_L1_CA_CODE_LENGTH_CHIPS;
T_prn_samples = T_prn_seconds * static_cast<double>(d_fs_in);
K_blk_samples = T_prn_samples + d_rem_code_phase_samples - dll_code_error_secs_Ti * static_cast<double>(d_fs_in);
d_current_prn_length_samples = round(K_blk_samples); //round to a discrete samples
d_correlation_length_samples = round(K_blk_samples); //round to a discrete samples
old_d_rem_code_phase_samples=d_rem_code_phase_samples;
d_rem_code_phase_samples = K_blk_samples - static_cast<double>(d_current_prn_length_samples); //rounding error < 1 sample
d_rem_code_phase_samples = K_blk_samples - static_cast<double>(d_correlation_length_samples); //rounding error < 1 sample
// UPDATE REMNANT CARRIER PHASE
CORRECTED_INTEGRATION_TIME_S=(static_cast<double>(d_correlation_length_samples)/static_cast<double>(d_fs_in));
//remnant carrier phase [rad]
d_rem_carrier_phase_rad = fmod(d_rem_carrier_phase_rad + GPS_TWO_PI * d_carrier_doppler_hz * CORRECTED_INTEGRATION_TIME_S,GPS_TWO_PI);
// UPDATE CARRIER PHASE ACCUULATOR
//carrier phase accumulator prior to update the PLL estimators (accumulated carrier in this loop depends on the old estimations!)
d_acc_carrier_phase_cycles -= d_carrier_doppler_hz*CORRECTED_INTEGRATION_TIME_S;
//################### PLL COMMANDS #################################################
//carrier phase step (NCO phase increment per sample) [rads/sample]
@ -530,7 +537,7 @@ int gps_l1_ca_dll_pll_artemisa_tracking_cc::general_work (int noutput_items, gr_
// AUX vars (for debug purposes)
tmp_double = d_rem_code_phase_samples;
d_dump_file.write(reinterpret_cast<char*>(&tmp_double), sizeof(double));
tmp_double = static_cast<double>(d_sample_counter + d_current_prn_length_samples);
tmp_double = static_cast<double>(d_sample_counter + d_correlation_length_samples);
d_dump_file.write(reinterpret_cast<char*>(&tmp_double), sizeof(double));
}
catch (const std::ifstream::failure* e)
@ -539,9 +546,9 @@ int gps_l1_ca_dll_pll_artemisa_tracking_cc::general_work (int noutput_items, gr_
}
}
consume_each(d_current_prn_length_samples); // this is necessary in gr::block derivates
d_sample_counter += d_current_prn_length_samples; //count for the processed samples
//LOG(INFO)<<"GPS tracking output end on CH="<<this->d_channel << " SAMPLE STAMP="<<d_sample_counter<<std::endl;
consume_each(d_correlation_length_samples); // this is necessary in gr::block derivates
d_sample_counter += d_correlation_length_samples; //count for the processed samples
return 1; //output tracking result ALWAYS even in the case of d_enable_tracking==false
}

4
src/algorithms/tracking/gnuradio_blocks/gps_l1_ca_dll_pll_artemisa_tracking_cc.h
View File

@ -152,8 +152,8 @@ private:
double d_code_phase_samples;
double d_pll_to_dll_assist_secs_Ti;
//PRN period in samples
int d_current_prn_length_samples;
//Integration period in samples
int d_correlation_length_samples;
//processing samples counters
unsigned long int d_sample_counter;

63
src/algorithms/tracking/gnuradio_blocks/gps_l1_ca_dll_pll_optim_tracking_cc.cc
View File

@ -183,29 +183,29 @@ void Gps_L1_Ca_Dll_Pll_Optim_Tracking_cc::start_tracking()
d_acq_sample_stamp = d_acquisition_gnss_synchro->Acq_samplestamp_samples;
long int acq_trk_diff_samples;
float acq_trk_diff_seconds;
double acq_trk_diff_seconds;
acq_trk_diff_samples = static_cast<long int>(d_sample_counter) - static_cast<long int>(d_acq_sample_stamp); //-d_vector_length;
LOG(INFO) << "Number of samples between Acquisition and Tracking =" << acq_trk_diff_samples;
acq_trk_diff_seconds = static_cast<float>(acq_trk_diff_samples) / static_cast<float>(d_fs_in);
//doppler effect
// Fd=(C/(C+Vr))*F
float radial_velocity;
double radial_velocity;
radial_velocity = (GPS_L1_FREQ_HZ + d_acq_carrier_doppler_hz) / GPS_L1_FREQ_HZ;
// new chip and prn sequence periods based on acq Doppler
float T_chip_mod_seconds;
float T_prn_mod_seconds;
float T_prn_mod_samples;
double T_chip_mod_seconds;
double T_prn_mod_seconds;
double T_prn_mod_samples;
d_code_freq_chips = radial_velocity * GPS_L1_CA_CODE_RATE_HZ;
T_chip_mod_seconds = 1/d_code_freq_chips;
T_prn_mod_seconds = T_chip_mod_seconds * GPS_L1_CA_CODE_LENGTH_CHIPS;
T_prn_mod_samples = T_prn_mod_seconds * static_cast<float>(d_fs_in);
d_current_prn_length_samples = round(T_prn_mod_samples);
float T_prn_true_seconds = GPS_L1_CA_CODE_LENGTH_CHIPS / GPS_L1_CA_CODE_RATE_HZ;
float T_prn_true_samples = T_prn_true_seconds * static_cast<float>(d_fs_in);
float T_prn_diff_seconds = T_prn_true_seconds - T_prn_mod_seconds;
float N_prn_diff = acq_trk_diff_seconds / T_prn_true_seconds;
float corrected_acq_phase_samples, delay_correction_samples;
double T_prn_true_seconds = GPS_L1_CA_CODE_LENGTH_CHIPS / GPS_L1_CA_CODE_RATE_HZ;
double T_prn_true_samples = T_prn_true_seconds * static_cast<float>(d_fs_in);
double T_prn_diff_seconds = T_prn_true_seconds - T_prn_mod_seconds;
double N_prn_diff = acq_trk_diff_seconds / T_prn_true_seconds;
double corrected_acq_phase_samples, delay_correction_samples;
corrected_acq_phase_samples = fmod((d_acq_code_phase_samples + T_prn_diff_seconds * N_prn_diff * static_cast<float>(d_fs_in)), T_prn_true_samples);
if (corrected_acq_phase_samples < 0)
{
@ -338,10 +338,10 @@ int Gps_L1_Ca_Dll_Pll_Optim_Tracking_cc::general_work (int noutput_items, gr_vec
{
// stream to collect cout calls to improve thread safety
std::stringstream tmp_str_stream;
float carr_error_hz;
float carr_error_filt_hz;
float code_error_chips;
float code_error_filt_chips;
double carr_error_hz;
double carr_error_filt_hz;
double code_error_chips;
double code_error_filt_chips;
if (d_enable_tracking == true)
{
@ -398,7 +398,7 @@ int Gps_L1_Ca_Dll_Pll_Optim_Tracking_cc::general_work (int noutput_items, gr_vec
#endif
// ################## PLL ##########################################################
// PLL discriminator
carr_error_hz = pll_cloop_two_quadrant_atan(*d_Prompt) / static_cast<float>(GPS_TWO_PI);
carr_error_hz = pll_cloop_two_quadrant_atan(*d_Prompt) / GPS_TWO_PI;
// Carrier discriminator filter
carr_error_filt_hz = d_carrier_loop_filter.get_carrier_nco(carr_error_hz);
// New carrier Doppler frequency estimation
@ -406,7 +406,7 @@ int Gps_L1_Ca_Dll_Pll_Optim_Tracking_cc::general_work (int noutput_items, gr_vec
// New code Doppler frequency estimation
d_code_freq_chips = GPS_L1_CA_CODE_RATE_HZ + ((d_carrier_doppler_hz * GPS_L1_CA_CODE_RATE_HZ) / GPS_L1_FREQ_HZ);
//carrier phase accumulator for (K) doppler estimation
d_acc_carrier_phase_rad = d_acc_carrier_phase_rad + GPS_TWO_PI * d_carrier_doppler_hz * GPS_L1_CA_CODE_PERIOD;
d_acc_carrier_phase_rad -= GPS_TWO_PI * d_carrier_doppler_hz * GPS_L1_CA_CODE_PERIOD;
//remnant carrier phase to prevent overflow in the code NCO
d_rem_carr_phase_rad = d_rem_carr_phase_rad + GPS_TWO_PI * d_carrier_doppler_hz * GPS_L1_CA_CODE_PERIOD;
d_rem_carr_phase_rad = fmod(d_rem_carr_phase_rad, GPS_TWO_PI);
@ -417,7 +417,7 @@ int Gps_L1_Ca_Dll_Pll_Optim_Tracking_cc::general_work (int noutput_items, gr_vec
// Code discriminator filter
code_error_filt_chips = d_code_loop_filter.get_code_nco(code_error_chips); //[chips/second]
//Code phase accumulator
float code_error_filt_secs;
double code_error_filt_secs;
code_error_filt_secs = (GPS_L1_CA_CODE_PERIOD * code_error_filt_chips) / GPS_L1_CA_CODE_RATE_HZ; //[seconds]
d_acc_code_phase_secs = d_acc_code_phase_secs + code_error_filt_secs;
@ -428,7 +428,7 @@ int Gps_L1_Ca_Dll_Pll_Optim_Tracking_cc::general_work (int noutput_items, gr_vec
double T_prn_samples;
double K_blk_samples;
// Compute the next buffer length based in the new period of the PRN sequence and the code phase error estimation
T_chip_seconds = 1 / static_cast<double>(d_code_freq_chips);
T_chip_seconds = 1.0 / d_code_freq_chips;
T_prn_seconds = T_chip_seconds * GPS_L1_CA_CODE_LENGTH_CHIPS;
T_prn_samples = T_prn_seconds * static_cast<double>(d_fs_in);
K_blk_samples = T_prn_samples + d_rem_code_phase_samples + code_error_filt_secs * static_cast<double>(d_fs_in);
@ -563,23 +563,32 @@ int Gps_L1_Ca_Dll_Pll_Optim_Tracking_cc::general_work (int noutput_items, gr_vec
//tmp_float=(float)d_sample_counter;
d_dump_file.write((char*)&d_sample_counter, sizeof(unsigned long int));
// accumulated carrier phase
d_dump_file.write((char*)&d_acc_carrier_phase_rad, sizeof(float));
tmp_float=d_acc_carrier_phase_rad;
d_dump_file.write((char*)&tmp_float, sizeof(float));
// carrier and code frequency
d_dump_file.write((char*)&d_carrier_doppler_hz, sizeof(float));
d_dump_file.write((char*)&d_code_freq_chips, sizeof(float));
tmp_float=d_carrier_doppler_hz;
d_dump_file.write((char*)&tmp_float, sizeof(float));
tmp_float=d_code_freq_chips;
d_dump_file.write((char*)&tmp_float, sizeof(float));
//PLL commands
d_dump_file.write((char*)&carr_error_hz, sizeof(float));
d_dump_file.write((char*)&carr_error_filt_hz, sizeof(float));
tmp_float=carr_error_hz;
d_dump_file.write((char*)&tmp_float, sizeof(float));
tmp_float=carr_error_filt_hz;
d_dump_file.write((char*)&tmp_float, sizeof(float));
//DLL commands
d_dump_file.write((char*)&code_error_chips, sizeof(float));
d_dump_file.write((char*)&code_error_filt_chips, sizeof(float));
tmp_float=code_error_chips;
d_dump_file.write((char*)&tmp_float, sizeof(float));
tmp_float=code_error_filt_chips;
d_dump_file.write((char*)&tmp_float, sizeof(float));
// CN0 and carrier lock test
d_dump_file.write((char*)&d_CN0_SNV_dB_Hz, sizeof(float));
d_dump_file.write((char*)&d_carrier_lock_test, sizeof(float));
tmp_float=d_CN0_SNV_dB_Hz;
d_dump_file.write((char*)&tmp_float, sizeof(float));
tmp_float=d_carrier_lock_test;
d_dump_file.write((char*)&tmp_float, sizeof(float));
// AUX vars (for debug purposes)
tmp_float = d_rem_code_phase_samples;

20
src/algorithms/tracking/gnuradio_blocks/gps_l1_ca_dll_pll_optim_tracking_cc.h
View File

@ -135,24 +135,24 @@ private:
// remaining code phase and carrier phase between tracking loops
double d_rem_code_phase_samples;
float d_rem_carr_phase_rad;
double d_rem_carr_phase_rad;
// PLL and DLL filter library
Tracking_2nd_DLL_filter d_code_loop_filter;
Tracking_2nd_PLL_filter d_carrier_loop_filter;
// acquisition
float d_acq_code_phase_samples;
float d_acq_carrier_doppler_hz;
double d_acq_code_phase_samples;
double d_acq_carrier_doppler_hz;
// correlator
Correlator d_correlator;
// tracking vars
double d_code_freq_chips;
float d_carrier_doppler_hz;
float d_acc_carrier_phase_rad;
float d_code_phase_samples;
float d_acc_code_phase_secs;
double d_carrier_doppler_hz;
double d_acc_carrier_phase_rad;
double d_code_phase_samples;
double d_acc_code_phase_secs;
//PRN period in samples
int d_current_prn_length_samples;
@ -164,9 +164,9 @@ private:
// CN0 estimation and lock detector
int d_cn0_estimation_counter;
gr_complex* d_Prompt_buffer;
float d_carrier_lock_test;
float d_CN0_SNV_dB_Hz;
float d_carrier_lock_threshold;
double d_carrier_lock_test;
double d_CN0_SNV_dB_Hz;
double d_carrier_lock_threshold;
int d_carrier_lock_fail_counter;
// control vars

68
src/algorithms/tracking/gnuradio_blocks/gps_l1_ca_dll_pll_tracking_cc.cc
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@ -190,17 +190,17 @@ void Gps_L1_Ca_Dll_Pll_Tracking_cc::start_tracking()
d_acq_sample_stamp = d_acquisition_gnss_synchro->Acq_samplestamp_samples;
long int acq_trk_diff_samples;
float acq_trk_diff_seconds;
double acq_trk_diff_seconds;
acq_trk_diff_samples = static_cast<long int>(d_sample_counter) - static_cast<long int>(d_acq_sample_stamp);//-d_vector_length;
DLOG(INFO) << "Number of samples between Acquisition and Tracking =" << acq_trk_diff_samples;
acq_trk_diff_seconds = static_cast<float>(acq_trk_diff_samples) / static_cast<float>(d_fs_in);
//doppler effect
// Fd=(C/(C+Vr))*F
float radial_velocity = (GPS_L1_FREQ_HZ + d_acq_carrier_doppler_hz) / GPS_L1_FREQ_HZ;
double radial_velocity = (GPS_L1_FREQ_HZ + d_acq_carrier_doppler_hz) / GPS_L1_FREQ_HZ;
// new chip and prn sequence periods based on acq Doppler
float T_chip_mod_seconds;
float T_prn_mod_seconds;
float T_prn_mod_samples;
double T_chip_mod_seconds;
double T_prn_mod_seconds;
double T_prn_mod_samples;
d_code_freq_chips = radial_velocity * GPS_L1_CA_CODE_RATE_HZ;
T_chip_mod_seconds = 1/d_code_freq_chips;
T_prn_mod_seconds = T_chip_mod_seconds * GPS_L1_CA_CODE_LENGTH_CHIPS;
@ -208,11 +208,11 @@ void Gps_L1_Ca_Dll_Pll_Tracking_cc::start_tracking()
d_current_prn_length_samples = round(T_prn_mod_samples);
float T_prn_true_seconds = GPS_L1_CA_CODE_LENGTH_CHIPS / GPS_L1_CA_CODE_RATE_HZ;
float T_prn_true_samples = T_prn_true_seconds * static_cast<float>(d_fs_in);
float T_prn_diff_seconds= T_prn_true_seconds - T_prn_mod_seconds;
float N_prn_diff = acq_trk_diff_seconds / T_prn_true_seconds;
float corrected_acq_phase_samples, delay_correction_samples;
double T_prn_true_seconds = GPS_L1_CA_CODE_LENGTH_CHIPS / GPS_L1_CA_CODE_RATE_HZ;
double T_prn_true_samples = T_prn_true_seconds * static_cast<float>(d_fs_in);
double T_prn_diff_seconds= T_prn_true_seconds - T_prn_mod_seconds;
double N_prn_diff = acq_trk_diff_seconds / T_prn_true_seconds;
double corrected_acq_phase_samples, delay_correction_samples;
corrected_acq_phase_samples = fmod((d_acq_code_phase_samples + T_prn_diff_seconds * N_prn_diff * static_cast<float>(d_fs_in)), T_prn_true_samples);
if (corrected_acq_phase_samples < 0)
{
@ -297,7 +297,7 @@ void Gps_L1_Ca_Dll_Pll_Tracking_cc::update_local_code()
void Gps_L1_Ca_Dll_Pll_Tracking_cc::update_local_carrier()
{
float sin_f, cos_f;
float phase_step_rad = static_cast<float>(GPS_TWO_PI) * d_carrier_doppler_hz / static_cast<float>(d_fs_in);
float phase_step_rad = static_cast<float>(GPS_TWO_PI) * static_cast<float>(d_carrier_doppler_hz) / static_cast<float>(d_fs_in);
int phase_step_rad_i = gr::fxpt::float_to_fixed(phase_step_rad);
int phase_rad_i = gr::fxpt::float_to_fixed(d_rem_carr_phase_rad);
@ -336,10 +336,10 @@ int Gps_L1_Ca_Dll_Pll_Tracking_cc::general_work (int noutput_items, gr_vector_in
gr_vector_const_void_star &input_items, gr_vector_void_star &output_items)
{
// process vars
float carr_error_hz;
float carr_error_filt_hz;
float code_error_chips;
float code_error_filt_chips;
double carr_error_hz;
double carr_error_filt_hz;
double code_error_chips;
double code_error_filt_chips;
// Block input data and block output stream pointers
const gr_complex* in = (gr_complex*) input_items[0]; //PRN start block alignment
@ -355,7 +355,7 @@ int Gps_L1_Ca_Dll_Pll_Tracking_cc::general_work (int noutput_items, gr_vector_in
if (d_pull_in == true)
{
int samples_offset;
float acq_trk_shif_correction_samples;
double acq_trk_shif_correction_samples;
int acq_to_trk_delay_samples;
acq_to_trk_delay_samples = d_sample_counter - d_acq_sample_stamp;
acq_trk_shif_correction_samples = d_current_prn_length_samples - fmod(static_cast<float>(acq_to_trk_delay_samples), static_cast<float>(d_current_prn_length_samples));
@ -414,7 +414,7 @@ int Gps_L1_Ca_Dll_Pll_Tracking_cc::general_work (int noutput_items, gr_vector_in
// ################## PLL ##########################################################
// PLL discriminator
carr_error_hz = pll_cloop_two_quadrant_atan(*d_Prompt) / static_cast<float>(GPS_TWO_PI);
carr_error_hz = pll_cloop_two_quadrant_atan(*d_Prompt) / GPS_TWO_PI;
// Carrier discriminator filter
carr_error_filt_hz = d_carrier_loop_filter.get_carrier_nco(carr_error_hz);
// New carrier Doppler frequency estimation
@ -422,7 +422,7 @@ int Gps_L1_Ca_Dll_Pll_Tracking_cc::general_work (int noutput_items, gr_vector_in
// New code Doppler frequency estimation
d_code_freq_chips = GPS_L1_CA_CODE_RATE_HZ + ((d_carrier_doppler_hz * GPS_L1_CA_CODE_RATE_HZ) / GPS_L1_FREQ_HZ);
//carrier phase accumulator for (K) doppler estimation
d_acc_carrier_phase_rad = d_acc_carrier_phase_rad + GPS_TWO_PI * d_carrier_doppler_hz * GPS_L1_CA_CODE_PERIOD;
d_acc_carrier_phase_rad -= GPS_TWO_PI * d_carrier_doppler_hz * GPS_L1_CA_CODE_PERIOD;
//remanent carrier phase to prevent overflow in the code NCO
d_rem_carr_phase_rad = d_rem_carr_phase_rad + GPS_TWO_PI * d_carrier_doppler_hz * GPS_L1_CA_CODE_PERIOD;
d_rem_carr_phase_rad = fmod(d_rem_carr_phase_rad, GPS_TWO_PI);
@ -433,7 +433,7 @@ int Gps_L1_Ca_Dll_Pll_Tracking_cc::general_work (int noutput_items, gr_vector_in
// Code discriminator filter
code_error_filt_chips = d_code_loop_filter.get_code_nco(code_error_chips); //[chips/second]
//Code phase accumulator
float code_error_filt_secs;
double code_error_filt_secs;
code_error_filt_secs = (GPS_L1_CA_CODE_PERIOD * code_error_filt_chips) / GPS_L1_CA_CODE_RATE_HZ; //[seconds]
d_acc_code_phase_secs = d_acc_code_phase_secs + code_error_filt_secs;
@ -504,9 +504,9 @@ int Gps_L1_Ca_Dll_Pll_Tracking_cc::general_work (int noutput_items, gr_vector_in
//current_synchro_data.Tracking_timestamp_secs = ((double)d_sample_counter)/static_cast<double>(d_fs_in);
// This tracking block aligns the Tracking_timestamp_secs with the start sample of the PRN, thus, Code_phase_secs=0
current_synchro_data.Code_phase_secs = 0;
current_synchro_data.Carrier_phase_rads = static_cast<double>(d_acc_carrier_phase_rad);
current_synchro_data.Carrier_Doppler_hz = static_cast<double>(d_carrier_doppler_hz);
current_synchro_data.CN0_dB_hz = static_cast<double>(d_CN0_SNV_dB_Hz);
current_synchro_data.Carrier_phase_rads = d_acc_carrier_phase_rad;
current_synchro_data.Carrier_Doppler_hz = d_carrier_doppler_hz;
current_synchro_data.CN0_dB_hz = d_CN0_SNV_dB_Hz;
current_synchro_data.Flag_valid_pseudorange = false;
*out[0] = current_synchro_data;
@ -579,6 +579,7 @@ int Gps_L1_Ca_Dll_Pll_Tracking_cc::general_work (int noutput_items, gr_vector_in
tmp_L = std::abs<float>(*d_Late);
try
{
// EPR
d_dump_file.write(reinterpret_cast<char*>(&tmp_E), sizeof(float));
d_dump_file.write(reinterpret_cast<char*>(&tmp_P), sizeof(float));
@ -590,28 +591,27 @@ int Gps_L1_Ca_Dll_Pll_Tracking_cc::general_work (int noutput_items, gr_vector_in
//tmp_float=(float)d_sample_counter;
d_dump_file.write(reinterpret_cast<char*>(&d_sample_counter), sizeof(unsigned long int));
// accumulated carrier phase
d_dump_file.write(reinterpret_cast<char*>(&d_acc_carrier_phase_rad), sizeof(float));
d_dump_file.write(reinterpret_cast<char*>(&d_acc_carrier_phase_rad), sizeof(double));
// carrier and code frequency
d_dump_file.write(reinterpret_cast<char*>(&d_carrier_doppler_hz), sizeof(float));
tmp_float=d_code_freq_chips;
d_dump_file.write(reinterpret_cast<char*>(&tmp_float), sizeof(float));
d_dump_file.write(reinterpret_cast<char*>(&d_carrier_doppler_hz), sizeof(double));
d_dump_file.write(reinterpret_cast<char*>(&d_code_freq_chips), sizeof(double));
//PLL commands
d_dump_file.write(reinterpret_cast<char*>(&carr_error_hz), sizeof(float));
d_dump_file.write(reinterpret_cast<char*>(&carr_error_filt_hz), sizeof(float));
d_dump_file.write(reinterpret_cast<char*>(&carr_error_hz), sizeof(double));
d_dump_file.write(reinterpret_cast<char*>(&d_carrier_doppler_hz), sizeof(double));
//DLL commands
d_dump_file.write(reinterpret_cast<char*>(&code_error_chips), sizeof(float));
d_dump_file.write(reinterpret_cast<char*>(&code_error_filt_chips), sizeof(float));
d_dump_file.write(reinterpret_cast<char*>(&code_error_chips), sizeof(double));
d_dump_file.write(reinterpret_cast<char*>(&code_error_filt_chips), sizeof(double));
// CN0 and carrier lock test
d_dump_file.write(reinterpret_cast<char*>(&d_CN0_SNV_dB_Hz), sizeof(float));
d_dump_file.write(reinterpret_cast<char*>(&d_carrier_lock_test), sizeof(float));
d_dump_file.write(reinterpret_cast<char*>(&d_CN0_SNV_dB_Hz), sizeof(double));
d_dump_file.write(reinterpret_cast<char*>(&d_carrier_lock_test), sizeof(double));
// AUX vars (for debug purposes)
tmp_float = d_rem_code_phase_samples;
d_dump_file.write(reinterpret_cast<char*>(&tmp_float), sizeof(float));
tmp_double = d_rem_code_phase_samples;
d_dump_file.write(reinterpret_cast<char*>(&tmp_double), sizeof(double));
tmp_double = static_cast<double>(d_sample_counter + d_current_prn_length_samples);
d_dump_file.write(reinterpret_cast<char*>(&tmp_double), sizeof(double));
}

20
src/algorithms/tracking/gnuradio_blocks/gps_l1_ca_dll_pll_tracking_cc.h
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@ -139,24 +139,24 @@ private:
// remaining code phase and carrier phase between tracking loops
double d_rem_code_phase_samples;
float d_rem_carr_phase_rad;
double d_rem_carr_phase_rad;
// PLL and DLL filter library
Tracking_2nd_DLL_filter d_code_loop_filter;
Tracking_2nd_PLL_filter d_carrier_loop_filter;
// acquisition
float d_acq_code_phase_samples;
float d_acq_carrier_doppler_hz;
double d_acq_code_phase_samples;
double d_acq_carrier_doppler_hz;
// correlator
Correlator d_correlator;
// tracking vars
double d_code_freq_chips;
float d_carrier_doppler_hz;
float d_acc_carrier_phase_rad;
float d_code_phase_samples;
float d_acc_code_phase_secs;
double d_carrier_doppler_hz;
double d_acc_carrier_phase_rad;
double d_code_phase_samples;
double d_acc_code_phase_secs;
//PRN period in samples
int d_current_prn_length_samples;
@ -168,9 +168,9 @@ private:
// CN0 estimation and lock detector
int d_cn0_estimation_counter;
gr_complex* d_Prompt_buffer;
float d_carrier_lock_test;
float d_CN0_SNV_dB_Hz;
float d_carrier_lock_threshold;
double d_carrier_lock_test;
double d_CN0_SNV_dB_Hz;
double d_carrier_lock_threshold;
int d_carrier_lock_fail_counter;
// control vars

2
src/algorithms/tracking/gnuradio_blocks/gps_l1_ca_dll_pll_tracking_gpu_cc.cc
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@ -356,7 +356,7 @@ int Gps_L1_Ca_Dll_Pll_Tracking_GPU_cc::general_work (int noutput_items, gr_vecto
// New code Doppler frequency estimation
d_code_freq_chips = GPS_L1_CA_CODE_RATE_HZ + ((d_carrier_doppler_hz * GPS_L1_CA_CODE_RATE_HZ) / GPS_L1_FREQ_HZ);
//carrier phase accumulator for (K) doppler estimation
d_acc_carrier_phase_rad = d_acc_carrier_phase_rad + GPS_TWO_PI * d_carrier_doppler_hz * GPS_L1_CA_CODE_PERIOD;
d_acc_carrier_phase_rad -= GPS_TWO_PI * d_carrier_doppler_hz * GPS_L1_CA_CODE_PERIOD;
//remanent carrier phase to prevent overflow in the code NCO
d_rem_carr_phase_rad = d_rem_carr_phase_rad + GPS_TWO_PI * d_carrier_doppler_hz * GPS_L1_CA_CODE_PERIOD;
d_rem_carr_phase_rad = fmod(d_rem_carr_phase_rad, GPS_TWO_PI);

70
src/algorithms/tracking/gnuradio_blocks/gps_l2_m_dll_pll_tracking_cc.cc
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@ -199,11 +199,11 @@ void gps_l2_m_dll_pll_tracking_cc::start_tracking()
acq_trk_diff_seconds = static_cast<float>(acq_trk_diff_samples) / static_cast<float>(d_fs_in);
//doppler effect
// Fd=(C/(C+Vr))*F
float radial_velocity = (GPS_L2_FREQ_HZ + d_acq_carrier_doppler_hz) / GPS_L2_FREQ_HZ;
double radial_velocity = (GPS_L2_FREQ_HZ + d_acq_carrier_doppler_hz) / GPS_L2_FREQ_HZ;
// new chip and prn sequence periods based on acq Doppler
float T_chip_mod_seconds;
float T_prn_mod_seconds;
float T_prn_mod_samples;
double T_chip_mod_seconds;
double T_prn_mod_seconds;
double T_prn_mod_samples;
d_code_freq_chips = radial_velocity * GPS_L2_M_CODE_RATE_HZ;
T_chip_mod_seconds = 1/d_code_freq_chips;
T_prn_mod_seconds = T_chip_mod_seconds * GPS_L2_M_CODE_LENGTH_CHIPS;
@ -211,11 +211,11 @@ void gps_l2_m_dll_pll_tracking_cc::start_tracking()
d_current_prn_length_samples = round(T_prn_mod_samples);
float T_prn_true_seconds = GPS_L2_M_CODE_LENGTH_CHIPS / GPS_L2_M_CODE_RATE_HZ;
float T_prn_true_samples = T_prn_true_seconds * static_cast<float>(d_fs_in);
float T_prn_diff_seconds= T_prn_true_seconds - T_prn_mod_seconds;
float N_prn_diff = acq_trk_diff_seconds / T_prn_true_seconds;
float corrected_acq_phase_samples, delay_correction_samples;
double T_prn_true_seconds = GPS_L2_M_CODE_LENGTH_CHIPS / GPS_L2_M_CODE_RATE_HZ;
double T_prn_true_samples = T_prn_true_seconds * static_cast<float>(d_fs_in);
double T_prn_diff_seconds= T_prn_true_seconds - T_prn_mod_seconds;
double N_prn_diff = acq_trk_diff_seconds / T_prn_true_seconds;
double corrected_acq_phase_samples, delay_correction_samples;
corrected_acq_phase_samples = fmod((d_acq_code_phase_samples + T_prn_diff_seconds * N_prn_diff * static_cast<float>(d_fs_in)), T_prn_true_samples);
if (corrected_acq_phase_samples < 0)
{
@ -276,7 +276,7 @@ void gps_l2_m_dll_pll_tracking_cc::update_local_code()
int epl_loop_length_samples;
// unified loop for E, P, L code vectors
code_phase_step_chips = static_cast<double>(d_code_freq_chips) / static_cast<double>(d_fs_in);
code_phase_step_chips = d_code_freq_chips / static_cast<double>(d_fs_in);
rem_code_phase_chips = d_rem_code_phase_samples * (d_code_freq_chips / d_fs_in);
tcode_chips = -rem_code_phase_chips;
@ -301,7 +301,7 @@ void gps_l2_m_dll_pll_tracking_cc::update_local_carrier()
{
float phase_rad, phase_step_rad;
phase_step_rad = static_cast<float>(GPS_L2_TWO_PI) * d_carrier_doppler_hz / static_cast<float>(d_fs_in);
phase_step_rad = GPS_L2_TWO_PI * d_carrier_doppler_hz / static_cast<float>(d_fs_in);
phase_rad = d_rem_carr_phase_rad;
for(int i = 0; i < d_current_prn_length_samples; i++)
{
@ -337,10 +337,10 @@ int gps_l2_m_dll_pll_tracking_cc::general_work (int noutput_items, gr_vector_int
gr_vector_const_void_star &input_items, gr_vector_void_star &output_items)
{
// process vars
float carr_error_hz=0;
float carr_error_filt_hz=0;
float code_error_chips=0;
float code_error_filt_chips=0;
double carr_error_hz=0;
double carr_error_filt_hz=0;
double code_error_chips=0;
double code_error_filt_chips=0;
// GNSS_SYNCHRO OBJECT to interchange data between tracking->telemetry_decoder
Gnss_Synchro current_synchro_data = Gnss_Synchro();
@ -355,7 +355,7 @@ int gps_l2_m_dll_pll_tracking_cc::general_work (int noutput_items, gr_vector_int
if (d_pull_in == true)
{
int samples_offset;
float acq_trk_shif_correction_samples;
double acq_trk_shif_correction_samples;
int acq_to_trk_delay_samples;
acq_to_trk_delay_samples = (d_sample_counter - (d_acq_sample_stamp-d_current_prn_length_samples));
acq_trk_shif_correction_samples = -fmod(static_cast<float>(acq_to_trk_delay_samples), static_cast<float>(d_current_prn_length_samples));
@ -419,7 +419,7 @@ int gps_l2_m_dll_pll_tracking_cc::general_work (int noutput_items, gr_vector_int
// ################## PLL ##########################################################
// PLL discriminator
carr_error_hz = pll_cloop_two_quadrant_atan(*d_Prompt) / static_cast<float>(GPS_L2_TWO_PI);
carr_error_hz = pll_cloop_two_quadrant_atan(*d_Prompt) / GPS_L2_TWO_PI;
// Carrier discriminator filter
carr_error_filt_hz = d_carrier_loop_filter.get_carrier_nco(carr_error_hz);
// New carrier Doppler frequency estimation
@ -427,7 +427,7 @@ int gps_l2_m_dll_pll_tracking_cc::general_work (int noutput_items, gr_vector_int
// New code Doppler frequency estimation
d_code_freq_chips = GPS_L2_M_CODE_RATE_HZ + ((d_carrier_doppler_hz * GPS_L2_M_CODE_RATE_HZ) / GPS_L2_FREQ_HZ);
//carrier phase accumulator for (K) doppler estimation
d_acc_carrier_phase_rad = d_acc_carrier_phase_rad + GPS_L2_TWO_PI * d_carrier_doppler_hz * GPS_L2_M_PERIOD;
d_acc_carrier_phase_rad -= GPS_L2_TWO_PI * d_carrier_doppler_hz * GPS_L2_M_PERIOD;
//remanent carrier phase to prevent overflow in the code NCO
d_rem_carr_phase_rad = d_rem_carr_phase_rad + GPS_L2_TWO_PI * d_carrier_doppler_hz * GPS_L2_M_PERIOD;
d_rem_carr_phase_rad = fmod(d_rem_carr_phase_rad, GPS_L2_TWO_PI);
@ -438,7 +438,7 @@ int gps_l2_m_dll_pll_tracking_cc::general_work (int noutput_items, gr_vector_int
// Code discriminator filter
code_error_filt_chips = d_code_loop_filter.get_code_nco(code_error_chips); //[chips/second]
//Code phase accumulator
float code_error_filt_secs;
double code_error_filt_secs;
code_error_filt_secs = (GPS_L2_M_PERIOD * code_error_filt_chips) / GPS_L2_M_CODE_RATE_HZ; //[seconds]
d_acc_code_phase_secs = d_acc_code_phase_secs + code_error_filt_secs;
@ -449,7 +449,7 @@ int gps_l2_m_dll_pll_tracking_cc::general_work (int noutput_items, gr_vector_int
double T_prn_samples;
double K_blk_samples;
// Compute the next buffer length based in the new period of the PRN sequence and the code phase error estimation
T_chip_seconds = 1 / static_cast<double>(d_code_freq_chips);
T_chip_seconds = 1.0 / d_code_freq_chips;
T_prn_seconds = T_chip_seconds * GPS_L2_M_CODE_LENGTH_CHIPS;
T_prn_samples = T_prn_seconds * static_cast<double>(d_fs_in);
K_blk_samples = T_prn_samples + d_rem_code_phase_samples + code_error_filt_secs * static_cast<double>(d_fs_in);
@ -502,16 +502,16 @@ int gps_l2_m_dll_pll_tracking_cc::general_work (int noutput_items, gr_vector_int
//current_synchro_data.Tracking_timestamp_secs = ((double)d_sample_counter + (double)d_current_prn_length_samples + (double)d_rem_code_phase_samples)/static_cast<double>(d_fs_in);
// Tracking_timestamp_secs is aligned with the CURRENT PRN start sample (Hybridization OK!, but some glitches??)
current_synchro_data.Tracking_timestamp_secs = (static_cast<double>(d_sample_counter) + static_cast<double>(d_rem_code_phase_samples)) / static_cast<double>(d_fs_in);
current_synchro_data.Tracking_timestamp_secs = (static_cast<double>(d_sample_counter) + d_rem_code_phase_samples) / static_cast<double>(d_fs_in);
//compute remnant code phase samples AFTER the Tracking timestamp
d_rem_code_phase_samples = K_blk_samples - d_current_prn_length_samples; //rounding error < 1 sample
//current_synchro_data.Tracking_timestamp_secs = ((double)d_sample_counter)/static_cast<double>(d_fs_in);
// This tracking block aligns the Tracking_timestamp_secs with the start sample of the PRN, thus, Code_phase_secs=0
current_synchro_data.Code_phase_secs = 0;
current_synchro_data.Carrier_phase_rads = static_cast<double>(d_acc_carrier_phase_rad);
current_synchro_data.Carrier_Doppler_hz = static_cast<double>(d_carrier_doppler_hz);
current_synchro_data.CN0_dB_hz = static_cast<double>(d_CN0_SNV_dB_Hz);
current_synchro_data.Carrier_phase_rads = d_acc_carrier_phase_rad;
current_synchro_data.Carrier_Doppler_hz = d_carrier_doppler_hz;
current_synchro_data.CN0_dB_hz = d_CN0_SNV_dB_Hz;
current_synchro_data.Flag_valid_tracking = true;
*out[0] = current_synchro_data;
@ -596,27 +596,27 @@ int gps_l2_m_dll_pll_tracking_cc::general_work (int noutput_items, gr_vector_int
//tmp_float=(float)d_sample_counter;
d_dump_file.write(reinterpret_cast<char*>(&d_sample_counter), sizeof(unsigned long int));
// accumulated carrier phase
d_dump_file.write(reinterpret_cast<char*>(&d_acc_carrier_phase_rad), sizeof(float));
d_dump_file.write(reinterpret_cast<char*>(&d_acc_carrier_phase_rad), sizeof(double));
// carrier and code frequency
d_dump_file.write(reinterpret_cast<char*>(&d_carrier_doppler_hz), sizeof(float));
d_dump_file.write(reinterpret_cast<char*>(&d_code_freq_chips), sizeof(float));
d_dump_file.write(reinterpret_cast<char*>(&d_carrier_doppler_hz), sizeof(double));
d_dump_file.write(reinterpret_cast<char*>(&d_code_freq_chips), sizeof(double));
//PLL commands
d_dump_file.write(reinterpret_cast<char*>(&carr_error_hz), sizeof(float));
d_dump_file.write(reinterpret_cast<char*>(&carr_error_filt_hz), sizeof(float));
d_dump_file.write(reinterpret_cast<char*>(&carr_error_hz), sizeof(double));
d_dump_file.write(reinterpret_cast<char*>(&d_carrier_doppler_hz), sizeof(double));
//DLL commands
d_dump_file.write(reinterpret_cast<char*>(&code_error_chips), sizeof(float));
d_dump_file.write(reinterpret_cast<char*>(&code_error_filt_chips), sizeof(float));
d_dump_file.write(reinterpret_cast<char*>(&code_error_chips), sizeof(double));
d_dump_file.write(reinterpret_cast<char*>(&code_error_filt_chips), sizeof(double));
// CN0 and carrier lock test
d_dump_file.write(reinterpret_cast<char*>(&d_CN0_SNV_dB_Hz), sizeof(float));
d_dump_file.write(reinterpret_cast<char*>(&d_carrier_lock_test), sizeof(float));
d_dump_file.write(reinterpret_cast<char*>(&d_CN0_SNV_dB_Hz), sizeof(double));
d_dump_file.write(reinterpret_cast<char*>(&d_carrier_lock_test), sizeof(double));
// AUX vars (for debug purposes)
tmp_float = d_rem_code_phase_samples;
d_dump_file.write(reinterpret_cast<char*>(&tmp_float), sizeof(float));
tmp_double = d_rem_code_phase_samples;
d_dump_file.write(reinterpret_cast<char*>(&tmp_double), sizeof(double));
tmp_double = static_cast<double>(d_sample_counter + d_current_prn_length_samples);
d_dump_file.write(reinterpret_cast<char*>(&tmp_double), sizeof(double));
}

20
src/algorithms/tracking/gnuradio_blocks/gps_l2_m_dll_pll_tracking_cc.h
View File

@ -137,24 +137,24 @@ private:
// remaining code phase and carrier phase between tracking loops
double d_rem_code_phase_samples;
float d_rem_carr_phase_rad;
double d_rem_carr_phase_rad;
// PLL and DLL filter library
Tracking_2nd_DLL_filter d_code_loop_filter;
Tracking_2nd_PLL_filter d_carrier_loop_filter;
// acquisition
float d_acq_code_phase_samples;
float d_acq_carrier_doppler_hz;
double d_acq_code_phase_samples;
double d_acq_carrier_doppler_hz;
// correlator
Correlator d_correlator;
// tracking vars
double d_code_freq_chips;
float d_carrier_doppler_hz;
float d_acc_carrier_phase_rad;
float d_code_phase_samples;
float d_acc_code_phase_secs;
double d_carrier_doppler_hz;
double d_acc_carrier_phase_rad;
double d_code_phase_samples;
double d_acc_code_phase_secs;
//PRN period in samples
int d_current_prn_length_samples;
@ -166,9 +166,9 @@ private:
// CN0 estimation and lock detector
int d_cn0_estimation_counter;
gr_complex* d_Prompt_buffer;
float d_carrier_lock_test;
float d_CN0_SNV_dB_Hz;
float d_carrier_lock_threshold;
double d_carrier_lock_test;
double d_CN0_SNV_dB_Hz;
double d_carrier_lock_threshold;
int d_carrier_lock_fail_counter;
// control vars

20
src/algorithms/tracking/libs/CMakeLists.txt
View File

@ -18,21 +18,15 @@
if(ENABLE_CUDA)
FIND_PACKAGE(CUDA REQUIRED)
# Append current NVCC flags by something, eg comput capability
# set(CUDA_NVCC_FLAGS ${CUDA_NVCC_FLAGS} --gpu-architecture sm_30)
list(APPEND CUDA_NVCC_FLAGS "-gencode arch=compute_30,code=sm_30; -std=c++11;-O3; -use_fast_math -default-stream per-thread")
SET(CUDA_PROPAGATE_HOST_FLAGS OFF)
CUDA_INCLUDE_DIRECTORIES(
${CMAKE_CURRENT_SOURCE_DIR}
#${CMAKE_CURRENT_SOURCE_DIR}/cudahelpers
)
SET(LIB_TYPE STATIC) #set the lib type
set(CUDA_PROPAGATE_HOST_FLAGS OFF)
CUDA_INCLUDE_DIRECTORIES( ${CMAKE_CURRENT_SOURCE_DIR})
set(LIB_TYPE STATIC) #set the lib type
CUDA_ADD_LIBRARY(CUDA_CORRELATOR_LIB ${LIB_TYPE} cuda_multicorrelator.h cuda_multicorrelator.cu)
set(OPT_TRACKING_LIBRARIES ${OPT_TRACKING_LIBRARIES} CUDA_CORRELATOR_LIB)
set(OPT_TRACKING_INCLUDES ${OPT_TRACKING_INCLUDES} ${CUDA_INCLUDE_DIRS} )
endif(ENABLE_CUDA)
@ -54,7 +48,7 @@ include_directories(
${CMAKE_SOURCE_DIR}/src/core/interfaces
${CMAKE_SOURCE_DIR}/src/core/receiver
${VOLK_INCLUDE_DIRS}
${CUDA_INCLUDE_DIRS}
${OPT_TRACKING_INCLUDES}
)
if(ENABLE_GENERIC_ARCH)
@ -69,4 +63,4 @@ endif(SSE3_AVAILABLE)
file(GLOB TRACKING_LIB_HEADERS "*.h")
add_library(tracking_lib ${TRACKING_LIB_SOURCES} ${TRACKING_LIB_HEADERS})
source_group(Headers FILES ${TRACKING_LIB_HEADERS})
target_link_libraries(tracking_lib ${CUDA_CORRELATOR_LIB} ${VOLK_LIBRARIES} ${GNURADIO_RUNTIME_LIBRARIES})
target_link_libraries(tracking_lib ${OPT_TRACKING_LIBRARIES} ${VOLK_LIBRARIES} ${GNURADIO_RUNTIME_LIBRARIES})

16
src/algorithms/tracking/libs/tracking_discriminators.cc
View File

@ -46,9 +46,9 @@
* \f$I_{PS2},Q_{PS2}\f$ are the inphase and quadrature prompt correlator outputs respectively at sample time \f$t_2\f$. The output is in [radians/second].
*/
float fll_four_quadrant_atan(gr_complex prompt_s1, gr_complex prompt_s2, float t1, float t2)
double fll_four_quadrant_atan(gr_complex prompt_s1, gr_complex prompt_s2, double t1, double t2)
{
float cross, dot;
double cross, dot;
dot = prompt_s1.real()*prompt_s2.real() + prompt_s1.imag()*prompt_s2.imag();
cross = prompt_s1.real()*prompt_s2.imag() - prompt_s2.real()*prompt_s1.imag();
return atan2(cross, dot) / (t2-t1);
@ -62,7 +62,7 @@ float fll_four_quadrant_atan(gr_complex prompt_s1, gr_complex prompt_s2, float t
* \f}
* where \f$I_{PS1},Q_{PS1}\f$ are the inphase and quadrature prompt correlator outputs respectively. The output is in [radians].
*/
float pll_four_quadrant_atan(gr_complex prompt_s1)
double pll_four_quadrant_atan(gr_complex prompt_s1)
{
return atan2(prompt_s1.imag(), prompt_s1.real());
}
@ -75,7 +75,7 @@ float pll_four_quadrant_atan(gr_complex prompt_s1)
* \f}
* where \f$I_{PS1},Q_{PS1}\f$ are the inphase and quadrature prompt correlator outputs respectively. The output is in [radians].
*/
float pll_cloop_two_quadrant_atan(gr_complex prompt_s1)
double pll_cloop_two_quadrant_atan(gr_complex prompt_s1)
{
if (prompt_s1.real() != 0.0)
{
@ -96,9 +96,9 @@ float pll_cloop_two_quadrant_atan(gr_complex prompt_s1)
* where \f$E=\sqrt{I_{ES}^2+Q_{ES}^2}\f$ is the Early correlator output absolute value and
* \f$L=\sqrt{I_{LS}^2+Q_{LS}^2}\f$ is the Late correlator output absolute value. The output is in [chips].
*/
float dll_nc_e_minus_l_normalized(gr_complex early_s1, gr_complex late_s1)
double dll_nc_e_minus_l_normalized(gr_complex early_s1, gr_complex late_s1)
{
float P_early, P_late;
double P_early, P_late;
P_early = std::abs(early_s1);
P_late = std::abs(late_s1);
return 0.5*(P_early - P_late) / ((P_early + P_late));
@ -113,9 +113,9 @@ float dll_nc_e_minus_l_normalized(gr_complex early_s1, gr_complex late_s1)
* where \f$E=\sqrt{I_{VE}^2+Q_{VE}^2+I_{E}^2+Q_{E}^2}\f$ and
* \f$L=\sqrt{I_{VL}^2+Q_{VL}^2+I_{L}^2+Q_{L}^2}\f$ . The output is in [chips].
*/
float dll_nc_vemlp_normalized(gr_complex very_early_s1, gr_complex early_s1, gr_complex late_s1, gr_complex very_late_s1)
double dll_nc_vemlp_normalized(gr_complex very_early_s1, gr_complex early_s1, gr_complex late_s1, gr_complex very_late_s1)
{
float P_early, P_late;
double P_early, P_late;
P_early = std::sqrt(std::norm(very_early_s1) + std::norm(early_s1));
P_late = std::sqrt(std::norm(very_late_s1) + std::norm(late_s1));
return (P_early - P_late) / ((P_early + P_late));

10
src/algorithms/tracking/libs/tracking_discriminators.h
View File

@ -50,7 +50,7 @@
* \f$I_{PS1},Q_{PS1}\f$ are the inphase and quadrature prompt correlator outputs respectively at sample time \f$t_1\f$, and
* \f$I_{PS2},Q_{PS2}\f$ are the inphase and quadrature prompt correlator outputs respectively at sample time \f$t_2\f$. The output is in [radians/second].
*/
float fll_four_quadrant_atan(gr_complex prompt_s1, gr_complex prompt_s2, float t1, float t2);
double fll_four_quadrant_atan(gr_complex prompt_s1, gr_complex prompt_s2, double t1, double t2);
/*! \brief PLL four quadrant arctan discriminator
@ -61,7 +61,7 @@ float fll_four_quadrant_atan(gr_complex prompt_s1, gr_complex prompt_s2, float t
* \f}
* where \f$I_{PS1},Q_{PS1}\f$ are the inphase and quadrature prompt correlator outputs respectively. The output is in [radians].
*/
float pll_four_quadrant_atan(gr_complex prompt_s1);
double pll_four_quadrant_atan(gr_complex prompt_s1);
/*! \brief PLL Costas loop two quadrant arctan discriminator
@ -72,7 +72,7 @@ float pll_four_quadrant_atan(gr_complex prompt_s1);
* \f}
* where \f$I_{PS1},Q_{PS1}\f$ are the inphase and quadrature prompt correlator outputs respectively. The output is in [radians].
*/
float pll_cloop_two_quadrant_atan(gr_complex prompt_s1);
double pll_cloop_two_quadrant_atan(gr_complex prompt_s1);
/*! \brief DLL Noncoherent Early minus Late envelope normalized discriminator
@ -84,7 +84,7 @@ float pll_cloop_two_quadrant_atan(gr_complex prompt_s1);
* where \f$E=\sqrt{I_{ES}^2+Q_{ES}^2}\f$ is the Early correlator output absolute value and
* \f$L=\sqrt{I_{LS}^2+Q_{LS}^2}\f$ is the Late correlator output absolute value. The output is in [chips].
*/
float dll_nc_e_minus_l_normalized(gr_complex early_s1, gr_complex late_s1);
double dll_nc_e_minus_l_normalized(gr_complex early_s1, gr_complex late_s1);
/*! \brief DLL Noncoherent Very Early Minus Late Power (VEMLP) normalized discriminator
@ -97,7 +97,7 @@ float dll_nc_e_minus_l_normalized(gr_complex early_s1, gr_complex late_s1);
* where \f$E=\sqrt{I_{VE}^2+Q_{VE}^2+I_{E}^2+Q_{E}^2}\f$ and
* \f$L=\sqrt{I_{VL}^2+Q_{VL}^2+I_{L}^2+Q_{L}^2}\f$ . The output is in [chips].
*/
float dll_nc_vemlp_normalized(gr_complex very_early_s1, gr_complex early_s1, gr_complex late_s1, gr_complex very_late_s1);
double dll_nc_vemlp_normalized(gr_complex very_early_s1, gr_complex early_s1, gr_complex late_s1, gr_complex very_late_s1);
#endif

2
src/core/system_parameters/GPS_L1_CA.h
View File

@ -70,7 +70,7 @@ const double GPS_STARTOFFSET_ms = 68.802; //[ms] Initial sign. travel time (this
// OBSERVABLE HISTORY DEEP FOR INTERPOLATION
const int GPS_L1_CA_HISTORY_DEEP=200;
const int GPS_L1_CA_HISTORY_DEEP=100;
// NAVIGATION MESSAGE DEMODULATION AND DECODING
#define GPS_PREAMBLE {1, 0, 0, 0, 1, 0, 1, 1}

4
src/main/CMakeLists.txt
View File

@ -33,6 +33,10 @@ if(ENABLE_UHD)
set(GNSS_SDR_OPTIONAL_HEADERS ${GNSS_SDR_OPTIONAL_HEADERS} ${UHD_INCLUDE_DIRS})
endif(ENABLE_UHD)
if(OPENSSL_FOUND)
add_definitions( -DUSE_OPENSSL_FALLBACK=1 )
endif(OPENSSL_FOUND)
if(ENABLE_CUDA)
add_definitions(-DCUDA_GPU_ACCEL=1)
set(GNSS_SDR_OPTIONAL_LIBS ${GNSS_SDR_OPTIONAL_LIBS} ${CUDA_LIBRARIES})