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Added support to select the frontend clock reference source in UHD

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signal source (i.e. internal or external clock reference)
This commit is contained in:
Javier 2015-06-17 18:07:36 +02:00
parent df48bf7342
commit a31542cbf6
3 changed files with 20 additions and 21 deletions
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36
conf/gnss-sdr_GPS_L2C_USRP_X300_realtime.conf
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@ -7,7 +7,7 @@
;######### GLOBAL OPTIONS ##################
;internal_fs_hz: Internal signal sampling frequency after the signal conditioning stage [Hz].
GNSS-SDR.internal_fs_hz=2000000
GNSS-SDR.internal_fs_hz=4000000
;######### CONTROL_THREAD CONFIG ############
ControlThread.wait_for_flowgraph=false
@ -28,8 +28,10 @@ GNSS-SDR.SUPL_CI=0x31b0
SignalSource.implementation=UHD_Signal_Source
SignalSource.device_address=192.168.50.2
SignalSource.item_type=cshort
SignalSource.sampling_frequency=2000000
SignalSource.sampling_frequency=4000000
SignalSource.freq=1227600000
;### Options: internal, external, or MIMO
SignalSource.clock_source=internal
SignalSource.gain=35
SignalSource.subdevice=A:0
SignalSource.samples=0
@ -71,7 +73,7 @@ InputFilter.band2_error=1.0
InputFilter.filter_type=bandpass
InputFilter.grid_density=16
InputFilter.sampling_frequency=2000000
InputFilter.sampling_frequency=4000000
InputFilter.IF=0
;######### RESAMPLER CONFIG ############
@ -79,13 +81,13 @@ Resampler.implementation=Pass_Through
Resampler.dump=false
Resampler.dump_filename=../data/resampler.dat
Resampler.item_type=gr_complex
Resampler.sample_freq_in=2000000
Resampler.sample_freq_out=2000000
Resampler.sample_freq_in=4000000
Resampler.sample_freq_out=4000000
;######### CHANNELS GLOBAL CONFIG ############
;#count: Number of available GPS satellite channels.
Channels_2S.count=2
Channels_2S.count=1
;#in_acquisition: Number of channels simultaneously acquiring for the whole receiver
Channels.in_acquisition=1
@ -108,32 +110,28 @@ Channel7.signal=2S
;######### ACQUISITION GLOBAL CONFIG ############
;# GPS L2C M
Acquisition_2S.dump=false
Acquisition_2S.dump_filename=./acq_dump.dat
Acquisition_2S.item_type=gr_complex
Acquisition_2S.if=0
Acquisition_2S.coherent_integration_time_ms=1
Acquisition_2S.implementation=GPS_L2_M_PCPS_Acquisition
Acquisition_2S.threshold=0.001
;Acquisition_2S.pfa=0.00001
Acquisition_2S.threshold=0.0015
;Acquisition_2S.pfa=0.001
Acquisition_2S.doppler_max=5000
Acquisition_2S.doppler_step=30
Acquisition_2S.bit_transition_flag=false
Acquisition_2S.doppler_min=-5000
Acquisition_2S.doppler_step=60
Acquisition_2S.max_dwells=1
;######### TRACKING GLOBAL CONFIG ############
Tracking_2S.implementation=GPS_L2_M_DLL_PLL_Tracking
Tracking_2S.item_type=gr_complex
Tracking_2S.item_type=gr_complex
Tracking_2S.if=0
Tracking_2S.dump=true
Tracking_2S.dump_filename=./tracking_ch_
Tracking_2S.pll_bw_hz=2.0;
Tracking_2S.dll_bw_hz=0.3;
Tracking_2S.fll_bw_hz=2.0;
Tracking_2S.order=3;
Tracking_2S.dll_bw_hz=0.25;
Tracking_2S.fll_bw_hz=0.0;
Tracking_2S.order=2;
Tracking_2S.early_late_space_chips=0.5;
;######### TELEMETRY DECODER GPS CONFIG ############

4
src/algorithms/signal_source/adapters/uhd_signal_source.cc
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@ -64,6 +64,7 @@ UhdSignalSource::UhdSignalSource(ConfigurationInterface* configuration,
}
subdevice_ = configuration->property(role + ".subdevice", empty);
clock_source_ = configuration->property(role + ".clock_source", std::string("internal"));
RF_channels_ = configuration->property(role + ".RF_channels", 1);
sample_rate_ = configuration->property(role + ".sampling_frequency", (double)4.0e6);
item_type_ = configuration->property(role + ".item_type", default_item_type);
@ -152,8 +153,7 @@ UhdSignalSource::UhdSignalSource(ConfigurationInterface* configuration,
// 2.1 set sampling clock reference
// Set the clock source for the usrp device.
// Options: internal, external, or MIMO
std::string clk_reference = "internal";
uhd_source_->set_clock_source(clk_reference);
uhd_source_->set_clock_source(clock_source_);
// 2.2 set the sample rate for the usrp device
uhd_source_->set_samp_rate(sample_rate_);

1
src/algorithms/signal_source/adapters/uhd_signal_source.h
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@ -94,6 +94,7 @@ private:
size_t item_size_;
std::string subdevice_;
std::string clock_source_;
std::vector<double> freq_;
std::vector<double> gain_;