; Configuration file for using USRP1 as a RF front-end for GPS L2C signals ; Run: ; gnss-sdr --config_file=/path/to/gnss-sdr_GPS_L2C_USRP1_realtime.conf ; [GNSS-SDR] ;######### GLOBAL OPTIONS ################## ;internal_fs_hz: Internal signal sampling frequency after the signal conditioning stage [Hz]. GNSS-SDR.internal_fs_hz=2000000 ;######### CONTROL_THREAD CONFIG ############ ControlThread.wait_for_flowgraph=false ;######### SUPL RRLP GPS assistance configuration ##### GNSS-SDR.SUPL_gps_enabled=false GNSS-SDR.SUPL_read_gps_assistance_xml=true GNSS-SDR.SUPL_gps_ephemeris_server=supl.google.com GNSS-SDR.SUPL_gps_ephemeris_port=7275 GNSS-SDR.SUPL_gps_acquisition_server=supl.google.com GNSS-SDR.SUPL_gps_acquisition_port=7275 GNSS-SDR.SUPL_MCC=244 GNSS-SDR.SUPL_MNS=5 GNSS-SDR.SUPL_LAC=0x59e2 GNSS-SDR.SUPL_CI=0x31b0 ;######### SIGNAL_SOURCE CONFIG ############ SignalSource.implementation=UHD_Signal_Source SignalSource.item_type=gr_complex SignalSource.sampling_frequency=2000000 SignalSource.freq=1227600000 SignalSource.gain=60 SignalSource.subdevice=A:0 SignalSource.samples=0 SignalSource.repeat=false SignalSource.dump=false SignalSource.dump_filename=../data/signal_source.dat SignalSource.enable_throttle_control=false ;######### SIGNAL_CONDITIONER CONFIG ############ SignalConditioner.implementation=Signal_Conditioner ;######### DATA_TYPE_ADAPTER CONFIG ############ DataTypeAdapter.implementation=Pass_Through DataTypeAdapter.item_type=gr_complex ;######### INPUT_FILTER 0 CONFIG ############ ;## Filter the input data. Can be combined with frequency translation for IF signals ;#implementation: Use [Pass_Through] or [Fir_Filter] or [Freq_Xlating_Fir_Filter] ;#[Pass_Through] disables this block ;#[Fir_Filter] enables a FIR Filter ;#[Freq_Xlating_Fir_Filter] enables FIR filter and a composite frequency translation that shifts IF down to zero Hz. InputFilter.implementation=Freq_Xlating_Fir_Filter ;#dump: Dump the filtered data to a file. InputFilter.dump=false ;#dump_filename: Log path and filename. InputFilter.dump_filename=../data/input_filter.dat ;#The following options are used in the filter design of Fir_Filter and Freq_Xlating_Fir_Filter implementation. ;#These options are based on parameters of gnuradio's function: gr_remez. ;#These function calculates the optimal (in the Chebyshev/minimax sense) FIR filter inpulse reponse given a set of band edges, ;#the desired reponse on those bands, and the weight given to the error in those bands. ;#input_item_type: Type and resolution for input signal samples. Use only gr_complex in this version. InputFilter.input_item_type=gr_complex ;#outut_item_type: Type and resolution for output filtered signal samples. Use only gr_complex in this version. InputFilter.output_item_type=gr_complex ;#taps_item_type: Type and resolution for the taps of the filter. Use only float in this version. InputFilter.taps_item_type=float ;#number_of_taps: Number of taps in the filter. Increasing this parameter increases the processing time InputFilter.number_of_taps=5 ;#number_of _bands: Number of frequency bands in the filter. InputFilter.number_of_bands=2 ;#bands: frequency at the band edges [ b1 e1 b2 e2 b3 e3 ...]. ;#Frequency is in the range [0, 1], with 1 being the Nyquist frequency (Fs/2) ;#The number of band_begin and band_end elements must match the number of bands InputFilter.band1_begin=0.0 InputFilter.band1_end=0.45 InputFilter.band2_begin=0.55 InputFilter.band2_end=1.0 ;#ampl: desired amplitude at the band edges [ a(b1) a(e1) a(b2) a(e2) ...]. ;#The number of ampl_begin and ampl_end elements must match the number of bands InputFilter.ampl1_begin=1.0 InputFilter.ampl1_end=1.0 InputFilter.ampl2_begin=0.0 InputFilter.ampl2_end=0.0 ;#band_error: weighting applied to each band (usually 1). ;#The number of band_error elements must match the number of bands InputFilter.band1_error=1.0 InputFilter.band2_error=1.0 ;#filter_type: one of "bandpass", "hilbert" or "differentiator" InputFilter.filter_type=bandpass ;#grid_density: determines how accurately the filter will be constructed. ;The minimum value is 16; higher values are slower to compute the filter. 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=20000000 InputFilter.IF=-1600000 ;# Decimation factor after the frequency tranaslating block InputFilter.decimation_factor=1 ;######### RESAMPLER CONFIG ############ 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 ;######### CHANNELS GLOBAL CONFIG ############ ;#count: Number of available GPS satellite channels. Channels_2S.count=1 ;#in_acquisition: Number of channels simultaneously acquiring for the whole receiver Channels.in_acquisition=1 Channel.signal=2S Channel0.signal=2S Channel1.signal=2S Channel2.signal=2S Channel3.signal=2S Channel4.signal=2S Channel5.signal=2S Channel6.signal=2S Channel7.signal=2S ;Channel8.signal=2S ;Channel9.signal=2S ;Channel10.signal=2S ;Channel11.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.implementation=GPS_L2_M_PCPS_Acquisition Acquisition_2S.threshold=0.0013 ;Acquisition_2S.pfa=0.001 Acquisition_2S.doppler_max=10000 Acquisition_2S.doppler_min=-10000 Acquisition_2S.doppler_step=100 Acquisition_2S.max_dwells=1 Tracking_2S.implementation=GPS_L2_M_DLL_PLL_Tracking 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=1.5; Tracking_2S.dll_bw_hz=0.3; Tracking_2S.order=3; Tracking_2S.early_late_space_chips=0.5; ;######### TELEMETRY DECODER GPS CONFIG ############ TelemetryDecoder_2S.implementation=GPS_L2_M_Telemetry_Decoder TelemetryDecoder_2S.dump=false TelemetryDecoder_2S.decimation_factor=1; ;######### OBSERVABLES CONFIG ############. Observables.implementation=GPS_L1_CA_Observables Observables.dump=false Observables.dump_filename=./observables.dat ;######### PVT CONFIG ############ PVT.implementation=GPS_L1_CA_PVT PVT.averaging_depth=10 PVT.flag_averaging=true PVT.output_rate_ms=100 PVT.display_rate_ms=500 PVT.dump_filename=./PVT PVT.nmea_dump_filename=./gnss_sdr_pvt.nmea; PVT.flag_nmea_tty_port=false; PVT.nmea_dump_devname=/dev/pts/4 PVT.flag_rtcm_server=false PVT.flag_rtcm_tty_port=false PVT.rtcm_dump_devname=/dev/pts/1 PVT.dump=false