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Changes in gps_l1_ca_pcps_acquisition_cc.cc. New test statistic of CFAR algorithm, according to decision theory. 

git-svn-id: https://svn.code.sf.net/p/gnss-sdr/code/trunk@78 64b25241-fba3-4117-9849-534c7e92360d
This commit is contained in:
Luis Esteve 2011-11-12 17:39:32 +00:00
parent dcc3e4d858
commit 93bb040a1e
2 changed files with 9 additions and 8 deletions
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11
conf/mercurio.conf
View File

@ -9,7 +9,8 @@ ControlThread.wait_for_flowgraph=false
SignalSource.implementation=File_Signal_Source SignalSource.implementation=File_Signal_Source
;SignalSource.filename=/media/DATALOGGER/signals/spirent scenario 2/data/sc2_d8.dat ;SignalSource.filename=/media/DATALOGGER/signals/spirent scenario 2/data/sc2_d8.dat
;SignalSource.filename=/media/My Passport/KINGSTON (G)/Project Luis/GPSL1_Fs_8MHz_ID_1_CN0_60.dat ;SignalSource.filename=/media/My Passport/KINGSTON (G)/Project Luis/GPSL1_Fs_8MHz_ID_1_CN0_60.dat
SignalSource.filename=/media/DATALOGGER/signals/Agilent GPS Generator/cap2/agilent_cap2.dat SignalSource.filename=/home/luis/Project/signals/cap2/agilent_cap2.dat
;SignalSource.filename=/home/luis/Project/signals/GPS_L1_8sats_4_Msps_CN0_52.dat
SignalSource.item_type=gr_complex SignalSource.item_type=gr_complex
SignalSource.sampling_frequency=4000000 SignalSource.sampling_frequency=4000000
SignalSource.samples=0 SignalSource.samples=0
@ -38,7 +39,7 @@ Acquisition.sampled_ms=1
;######### ACQUISITION 0 CONFIG ############ ;######### ACQUISITION 0 CONFIG ############
Acquisition0.implementation=GPS_L1_CA_PCPS_Acquisition Acquisition0.implementation=GPS_L1_CA_PCPS_Acquisition
Acquisition0.threshold=0.055 Acquisition0.threshold=440
Acquisition0.doppler_max=10000 Acquisition0.doppler_max=10000
Acquisition0.doppler_step=500 Acquisition0.doppler_step=500
Acquisition0.satellite=2 Acquisition0.satellite=2
@ -46,7 +47,7 @@ Acquisition0.repeat_satellite=true
;######### ACQUISITION 1 CONFIG ############ ;######### ACQUISITION 1 CONFIG ############
Acquisition1.implementation=GPS_L1_CA_PCPS_Acquisition Acquisition1.implementation=GPS_L1_CA_PCPS_Acquisition
Acquisition1.threshold=0.055 Acquisition1.threshold=440
Acquisition1.doppler_max=10000 Acquisition1.doppler_max=10000
Acquisition1.doppler_step=500 Acquisition1.doppler_step=500
Acquisition1.satellite=1 Acquisition1.satellite=1
@ -54,7 +55,7 @@ Acquisition1.repeat_satellite=true
;######### ACQUISITION 2 CONFIG ############ ;######### ACQUISITION 2 CONFIG ############
Acquisition2.implementation=GPS_L1_CA_PCPS_Acquisition Acquisition2.implementation=GPS_L1_CA_PCPS_Acquisition
Acquisition2.threshold=0.055 Acquisition2.threshold=440
Acquisition2.doppler_max=10000 Acquisition2.doppler_max=10000
Acquisition2.doppler_step=500 Acquisition2.doppler_step=500
Acquisition2.satellite=11 Acquisition2.satellite=11
@ -62,7 +63,7 @@ Acquisition2.repeat_satellite=true
;######### ACQUISITION 3 CONFIG ############ ;######### ACQUISITION 3 CONFIG ############
Acquisition3.implementation=GPS_L1_CA_PCPS_Acquisition Acquisition3.implementation=GPS_L1_CA_PCPS_Acquisition
Acquisition3.threshold=0.055 Acquisition3.threshold=440
Acquisition3.doppler_max=10000 Acquisition3.doppler_max=10000
Acquisition3.doppler_step=500 Acquisition3.doppler_step=500
Acquisition3.satellite=32 Acquisition3.satellite=32

6
src/algorithms/acquisition/gnuradio_blocks/gps_l1_ca_pcps_acquisition_cc.cc
View File

@ -216,7 +216,7 @@ int gps_l1_ca_pcps_acquisition_cc::general_work(int noutput_items,
{ {
d_input_power += std::abs(in[i]) * std::abs(in[i]); d_input_power += std::abs(in[i]) * std::abs(in[i]);
} }
//d_input_power = d_input_power / ((float)d_fft_size * (float)d_fft_size);
d_input_power = d_input_power / (float)d_fft_size; d_input_power = d_input_power / (float)d_fft_size;
// 2º- Doppler frequency search loop // 2º- Doppler frequency search loop
@ -255,7 +255,7 @@ int gps_l1_ca_pcps_acquisition_cc::general_work(int noutput_items,
indext=i; indext=i;
} }
} }
//magt = magt / (float)d_fft_size;
// Record results to files // Record results to files
if (d_dump) if (d_dump)
{ {
@ -278,7 +278,7 @@ int gps_l1_ca_pcps_acquisition_cc::general_work(int noutput_items,
} }
// 5º- Compute the test statistics and compare to the threshold // 5º- Compute the test statistics and compare to the threshold
d_test_statistics = d_mag / d_input_power; d_test_statistics = 2*d_fft_size*d_mag / d_input_power;
// 6º- Declare positive or negative acquisition using a message queue // 6º- Declare positive or negative acquisition using a message queue
if (d_test_statistics > d_threshold) if (d_test_statistics > d_threshold)