Added NSR conf file as e.g. use of two bit packed

file sample source. NOTE: This has not been tested with a real NSR front
end. The assumption is, based on reading the NSRFileSignalSource, that
the data is:
 o byte item type
 o real
 o bytes are little endian (least significant bits output first)

conf/gnss-sdr_GPS_L1_nsr_twobit_packed.conf

@@ -0,0 +1,152 @@
+; Sample configuration file for IFEN SX-NSR software receiver front-end
+; http://www.ifen.com/products/sx-scientific-gnss-solutions/nsr-software-receiver.html
+; This sample configuration is able to process directly .sream binary files
+; You can define your own receiver and invoke it by doing
+; gnss-sdr --config_file=my_GNSS_SDR_configuration.conf
+;
+
+[GNSS-SDR]
+
+;######### GLOBAL OPTIONS ##################
+;internal_fs_hz: Internal signal sampling frequency after the signal conditioning stage [Hz].
+GNSS-SDR.internal_fs_hz=2560000
+
+;######### 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=false
+GNSS-SDR.SUPL_gps_ephemeris_server=supl.nokia.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=Two_Bit_Packed_File_Signal_Source
+SignalSource.filename=/datalogger/signals/ifen/E1L1_FE0_Band0.stream
+SignalSource.item_type=byte
+; big_endian_items : not needed for byte inputs
+; If the input were 'short' then this can either be big endian or little
+; endian. If it is big endian then the second byte should be output
+; first in each short.
+; SignalSource.big_endian_items=false
+; big_endian_bytes: true if the most signficiant two bits in the byte
+; are the first two to be output.
+SignalSource.big_endian_bytes=false
+; sample_type: one of 'real' 'iq' or 'qi'
+; Data is either real or complex.
+; if the data is complex there are two conventions for sample ordering:
+; 1) Real first : 'iq'
+; 2) Imaginary first: 'qi'
+; This setting specifies which of the three cases holds for this data file
+SignalSource.sample_type=real
+SignalSource.sampling_frequency=20480000
+SignalSource.freq=1575420000
+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=float
+
+;######### INPUT_FILTER CONFIG ############
+InputFilter.implementation=Freq_Xlating_Fir_Filter
+InputFilter.dump=false
+InputFilter.dump_filename=../data/input_filter.dat
+InputFilter.input_item_type=float
+InputFilter.output_item_type=gr_complex
+InputFilter.taps_item_type=float
+InputFilter.number_of_taps=5
+InputFilter.number_of_bands=2
+InputFilter.band1_begin=0.0
+InputFilter.band1_end=0.45
+InputFilter.band2_begin=0.55
+InputFilter.band2_end=1.0
+InputFilter.ampl1_begin=1.0
+InputFilter.ampl1_end=1.0
+InputFilter.ampl2_begin=0.0
+InputFilter.ampl2_end=0.0
+InputFilter.band1_error=1.0
+InputFilter.band2_error=1.0
+InputFilter.filter_type=bandpass
+InputFilter.grid_density=16
+InputFilter.sampling_frequency=20480000
+InputFilter.IF=5499998.47412109
+InputFilter.decimation_factor=8
+
+
+;######### RESAMPLER CONFIG ############
+Resampler.implementation=Pass_Through
+Resampler.dump=false
+Resampler.dump_filename=../data/resampler.dat
+Resampler.item_type=gr_complex
+
+
+;######### CHANNELS GLOBAL CONFIG ############
+;#count: Number of available GPS satellite channels.
+Channels_1C.count=8
+Channels.in_acquisition=1
+Channel.signal=1C
+
+
+;######### GPS ACQUISITION CONFIG ############
+Acquisition_1C.dump=false
+Acquisition_1C.dump_filename=./acq_dump.dat
+Acquisition_1C.item_type=gr_complex
+Acquisition_1C.if=0
+Acquisition_1C.sampled_ms=1
+Acquisition_1C.implementation=GPS_L1_CA_PCPS_Acquisition
+Acquisition_1C.threshold=0.0075
+;Acquisition_1C.pfa=0.01
+Acquisition_1C.doppler_max=10000
+Acquisition_1C.doppler_step=500
+
+
+;######### TRACKING GPS CONFIG ############
+Tracking_1C.implementation=GPS_L1_CA_DLL_PLL_Tracking
+Tracking_1C.item_type=gr_complex
+Tracking_1C.if=0
+Tracking_1C.dump=false
+Tracking_1C.dump_filename=../data/epl_tracking_ch_
+Tracking_1C.pll_bw_hz=45.0;
+Tracking_1C.dll_bw_hz=2.0;
+Tracking_1C.order=3;
+
+;######### TELEMETRY DECODER GPS CONFIG ############
+TelemetryDecoder_1C.implementation=GPS_L1_CA_Telemetry_Decoder
+TelemetryDecoder_1C.dump=false
+TelemetryDecoder_1C.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=100
+PVT.flag_averaging=false
+PVT.output_rate_ms=10
+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.dump=true
+
+;######### OUTPUT_FILTER CONFIG ############
+OutputFilter.implementation=Null_Sink_Output_Filter
+OutputFilter.item_type=gr_complex