Added support for the Realtek RTL2832U OsmoSDR signal source. The Rtlsdr_Signal_Source adapter compilation is optional. See GNSS-SDR README for more information.

git-svn-id: https://svn.code.sf.net/p/gnss-sdr/code/trunk@220 64b25241-fba3-4117-9849-534c7e92360d
2025-01-11 18:00:34 +00:00 · 2012-08-01 13:11:02 +00:00 · 2012-08-01 13:11:02 +00:00 · bc87ea4472
commit bc87ea4472
parent 690d7c66e7
11 changed files with 820 additions and 147 deletions
--- a/13
+++ b/13
@ -104,7 +104,7 @@ $ make
 $ sudo make install
 $ sudo ldconfig

-Set the envirnoment variable GN3S_DRIVER=1 in order to enable the GN3S_Signal_Source in GNSS-SDR (OPTIONAL)
+- Set the envirnoment variable GN3S_DRIVER=1 in order to enable the GN3S_Signal_Source in GNSS-SDR (OPTIONAL)

 export GN3S_DRIVER=1

@ -116,6 +116,17 @@ Please copy this file to the application path. The GNSS-SDR default path is gnss

 (in order to disable the GN3S_Signal_Source compilation, you should remove the GN3S_DRIVER variable and build again GNSS-SDR)

+- Set the envirnoment variable RTLSDR_DRIVER=1 in order to enable the Rtlsdr_Signal_Source in GNSS-SDR (OPTIONAL)
+
+export RTLSDR_DRIVER=1
+
+In order to compile the RTLSDR adapter you should also provide the path to the gr-osmosdr source code using:
+
+export OSMOSDR_ROOT=/path/to/gr-osmosdr
+
+(in order to disable the Rtlsdr_Signal_Source compilation, you should remove the RTLSDR_DRIVER variable and build again GNSS-SDR)
+
+
 * Build GNSS-SDR

 - Go to GNSS-SDR's root directory and compile the program:
--- a/conf/gnss-sdr_rtlsdr_realtime.conf
+++ b/conf/gnss-sdr_rtlsdr_realtime.conf
@ -0,0 +1,438 @@
+; Default configuration file
+; 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=2000000
+
+;######### CONTROL_THREAD CONFIG ############
+ControlThread.wait_for_flowgraph=false
+
+;######### SIGNAL_SOURCE CONFIG ############
+;#implementation: Use [File_Signal_Source] or [UHD_Signal_Source] or [GN3S_Signal_Source] or [Rtlsdr_Signal_Source]
+SignalSource.implementation=Rtlsdr_Signal_Source
+
+;#filename: path to file with the captured GNSS signal samples to be processed
+SignalSource.filename=/media/DATALOGGER_/signals/Agilent GPS Generator/cap2/agilent_cap2.dat
+
+;#item_type: Type and resolution for each of the signal samples. Use only gr_complex in this version.
+SignalSource.item_type=gr_complex
+
+;#sampling_frequency: Original Signal sampling frequency in [Hz] 
+SignalSource.sampling_frequency=2000000
+
+;#freq: RF front-end center frequency in [Hz] 
+SignalSource.freq=1575420000
+
+;#gain: Front-end Gain in [dB] 
+SignalSource.gain=60
+
+;#AGC_enabled: RTLSDR AGC enabled [true or false]
+
+SignalSource.AGC_enabled=true
+
+;#subdevice: UHD subdevice specification (for USRP1 use A:0 or B:0)
+SignalSource.subdevice=B:0
+
+;#samples: Number of samples to be processed. Notice that 0 indicates the entire file.
+SignalSource.samples=0
+
+;#repeat: Repeat the processing file. Disable this option in this version
+SignalSource.repeat=false
+
+;#dump: Dump the Signal source data to a file. Disable this option in this version
+SignalSource.dump=false
+
+SignalSource.dump_filename=../data/signal_source.dat
+
+
+;#enable_throttle_control: Enabling this option tells the signal source to keep the delay between samples in post processing.
+; it helps to not overload the CPU, but the processing time will be longer. 
+SignalSource.enable_throttle_control=false
+
+
+;######### SIGNAL_CONDITIONER CONFIG ############
+;## It holds blocks to change data type, filter and resample input data. 
+
+;#implementation: Use [Pass_Through] or [Signal_Conditioner]
+;#[Pass_Through] disables this block and the [DataTypeAdapter], [InputFilter] and [Resampler] blocks
+;#[Signal_Conditioner] enables this block. Then you have to configure [DataTypeAdapter], [InputFilter] and [Resampler] blocks
+SignalConditioner.implementation=Signal_Conditioner
+;SignalConditioner.implementation=Pass_Through
+
+;######### DATA_TYPE_ADAPTER CONFIG ############
+;## Changes the type of input data. Please disable it in this version.
+;#implementation: [Pass_Through] disables this block
+DataTypeAdapter.implementation=Pass_Through
+
+;######### INPUT_FILTER 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=Fir_Filter
+InputFilter.implementation=Freq_Xlating_Fir_Filter
+;InputFilter.implementation=Pass_Through
+
+;#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=0.8
+InputFilter.band1_end=0.85
+InputFilter.band2_begin=0.90
+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=2000000
+InputFilter.IF=14821
+
+
+
+;######### RESAMPLER CONFIG ############
+;## Resamples the input data. 
+
+;#implementation: Use [Pass_Through] or [Direct_Resampler]
+;#[Pass_Through] disables this block
+;#[Direct_Resampler] enables a resampler that implements a nearest neigbourhood interpolation
+;Resampler.implementation=Direct_Resampler
+Resampler.implementation=Pass_Through
+
+;#dump: Dump the resamplered data to a file.
+Resampler.dump=false
+;#dump_filename: Log path and filename.
+Resampler.dump_filename=../data/resampler.dat
+
+;#item_type: Type and resolution for each of the signal samples. Use only gr_complex in this version.
+Resampler.item_type=gr_complex
+
+;#sample_freq_in: the sample frequency of the input signal
+Resampler.sample_freq_in=2000000
+
+;#sample_freq_out: the desired sample frequency of the output signal
+Resampler.sample_freq_out=2000000
+
+
+;######### CHANNELS GLOBAL CONFIG ############
+;#count: Number of available satellite channels.
+Channels.count=8
+;#in_acquisition: Number of channels simultaneously acquiring
+Channels.in_acquisition=1
+
+;######### CHANNEL 0 CONFIG ############
+;#system: GPS, GLONASS, GALILEO, SBAS or COMPASS
+;#if the option is disabled by default is assigned GPS
+Channel0.system=GPS
+
+;#signal: 
+;# "1C" GPS L1 C/A
+;# "1P" GPS L1 P
+;# "1W" GPS L1 Z-tracking and similar (AS on)
+;# "1Y" GPS L1 Y
+;# "1M" GPS L1 M
+;# "1N" GPS L1 codeless
+;# "2C" GPS L2 C/A
+;# "2D" GPS L2 L1(C/A)+(P2-P1) semi-codeless
+;# "2S" GPS L2 L2C (M)
+;# "2L" GPS L2 L2C (L)
+;# "2X" GPS L2 L2C (M+L)
+;# "2P" GPS L2 P
+;# "2W" GPS L2 Z-tracking and similar (AS on)
+;# "2Y" GPS L2 Y
+;# "2M" GPS GPS L2 M
+;# "2N" GPS L2 codeless
+;# "5I" GPS L5 I
+;# "5Q" GPS L5 Q
+;# "5X" GPS L5 I+Q
+;# "1C" GLONASS G1 C/A
+;# "1P" GLONASS G1 P
+;# "2C" GLONASS G2 C/A  (Glonass M)
+;# "2P" GLONASS G2 P
+;# "1A" GALILEO E1 A (PRS)
+;# "1B" GALILEO E1 B (I/NAV OS/CS/SoL)
+;# "1C" GALILEO E1 C (no data)
+;# "1X" GALILEO E1 B+C
+;# "1Z" GALILEO E1 A+B+C
+;# "5I" GALILEO E5a I (F/NAV OS)
+;# "5Q" GALILEO E5a Q  (no data)
+;# "5X" GALILEO E5a I+Q
+;# "7I" GALILEO E5b I
+;# "7Q" GALILEO E5b Q
+;# "7X" GALILEO E5b I+Q
+;# "8I" GALILEO E5 I
+;# "8Q" GALILEO E5 Q
+;# "8X" GALILEO E5 I+Q
+;# "6A" GALILEO E6 A
+;# "6B" GALILEO E6 B
+;# "6C" GALILEO E6 C
+;# "6X" GALILEO E6 B+C
+;# "6Z" GALILEO E6 A+B+C
+;# "1C" SBAS L1 C/A
+;# "5I" SBAS L5 I
+;# "5Q" SBAS L5 Q
+;# "5X" SBAS L5 I+Q
+;# "2I" COMPASS E2 I
+;# "2Q" COMPASS E2 Q
+;# "2X" COMPASS E2 IQ
+;# "7I" COMPASS E5b I
+;# "7Q" COMPASS E5b Q
+;# "7X" COMPASS E5b IQ
+;# "6I" COMPASS E6 I
+;# "6Q" COMPASS E6 Q
+;# "6X" COMPASS E6 IQ
+;#if the option is disabled by default is assigned "1C" GPS L1 C/A
+Channel0.signal=1C
+
+;#satellite: Satellite PRN ID for this channel. Disable this option to random search
+Channel0.satellite=15
+Channel0.repeat_satellite=false
+
+;######### CHANNEL 1 CONFIG ############
+
+Channel1.system=GPS
+Channel1.signal=1C
+Channel1.satellite=18
+Channel1.repeat_satellite=false
+
+;######### CHANNEL 2 CONFIG ############
+
+Channel2.system=GPS
+Channel2.signal=1C
+Channel2.satellite=16
+Channel2.repeat_satellite=false
+
+;######### CHANNEL 3 CONFIG ############
+
+Channel3.system=GPS
+Channel3.signal=1C
+Channel3.satellite=21
+Channel3.repeat_satellite=false
+
+;######### CHANNEL 4 CONFIG ############
+
+Channel4.system=GPS
+Channel4.signal=1C
+Channel4.satellite=3
+Channel4.repeat_satellite=false
+
+;######### CHANNEL 5 CONFIG ############
+
+Channel5.system=GPS
+Channel5.signal=1C
+;Channel5.satellite=21
+;Channel5.repeat_satellite=false
+
+
+;######### ACQUISITION GLOBAL CONFIG ############
+
+;#dump: Enable or disable the acquisition internal data file logging [true] or [false] 
+Acquisition.dump=false
+;#filename: Log path and filename
+Acquisition.dump_filename=./acq_dump.dat
+;#item_type: Type and resolution for each of the signal samples. Use only gr_complex in this version.
+Acquisition.item_type=gr_complex
+;#if: Signal intermediate frequency in [Hz] 
+Acquisition.if=0
+;#sampled_ms: Signal block duration for the acquisition signal detection [ms]
+Acquisition.sampled_ms=1
+
+;######### ACQUISITION CHANNELS CONFIG ######
+
+;######### ACQUISITION CH 0 CONFIG ############
+;#implementation: Acquisition algorithm selection for this channel: [GPS_L1_CA_PCPS_Acquisition]
+Acquisition0.implementation=GPS_L1_CA_PCPS_Acquisition
+;#threshold: Acquisition threshold
+Acquisition0.threshold=70
+;#doppler_max: Maximum expected Doppler shift [Hz]
+Acquisition0.doppler_max=10000
+;#doppler_max: Doppler step in the grid search [Hz]
+Acquisition0.doppler_step=250
+;#repeat_satellite: Use only jointly with the satellte PRN ID option. 
+
+
+;######### ACQUISITION CH 1 CONFIG ############
+Acquisition1.implementation=GPS_L1_CA_PCPS_Acquisition
+Acquisition1.threshold=70
+Acquisition1.doppler_max=10000
+Acquisition1.doppler_step=250
+
+
+;######### ACQUISITION CH 2 CONFIG ############
+Acquisition2.implementation=GPS_L1_CA_PCPS_Acquisition
+Acquisition2.threshold=70
+Acquisition2.doppler_max=10000
+Acquisition2.doppler_step=250
+
+
+;######### ACQUISITION CH 3 CONFIG ############
+Acquisition3.implementation=GPS_L1_CA_PCPS_Acquisition
+Acquisition3.threshold=70
+Acquisition3.doppler_max=10000
+Acquisition3.doppler_step=250
+
+
+;######### ACQUISITION CH 4 CONFIG ############
+Acquisition4.implementation=GPS_L1_CA_PCPS_Acquisition
+Acquisition4.threshold=70
+Acquisition4.doppler_max=10000
+Acquisition4.doppler_step=250
+
+
+;######### ACQUISITION CH 5 CONFIG ############
+Acquisition5.implementation=GPS_L1_CA_PCPS_Acquisition
+Acquisition5.threshold=50
+Acquisition5.doppler_max=10000
+Acquisition5.doppler_step=250
+
+
+;######### ACQUISITION CH 6 CONFIG ############
+Acquisition6.implementation=GPS_L1_CA_PCPS_Acquisition
+Acquisition6.threshold=70
+Acquisition6.doppler_max=10000
+Acquisition6.doppler_step=250
+
+
+;######### ACQUISITION CH 7 CONFIG ############
+Acquisition7.implementation=GPS_L1_CA_PCPS_Acquisition
+Acquisition7.threshold=70
+Acquisition7.doppler_max=10000
+Acquisition7.doppler_step=250
+
+
+;######### ACQUISITION CH 8 CONFIG ############
+Acquisition8.implementation=GPS_L1_CA_PCPS_Acquisition
+Acquisition8.threshold=70
+Acquisition8.doppler_max=10000
+Acquisition8.doppler_step=250
+
+
+
+;######### TRACKING GLOBAL CONFIG ############
+
+;#implementation: Selected tracking algorithm: [GPS_L1_CA_DLL_PLL_Tracking] or [GPS_L1_CA_DLL_FLL_PLL_Tracking]
+Tracking.implementation=GPS_L1_CA_DLL_PLL_Tracking
+;#item_type: Type and resolution for each of the signal samples. Use only [gr_complex] in this version.
+Tracking.item_type=gr_complex
+
+;#sampling_frequency: Signal Intermediate Frequency in [Hz] 
+Tracking.if=0
+
+;#dump: Enable or disable the Tracking internal binary data file logging [true] or [false] 
+Tracking.dump=false
+
+;#dump_filename: Log path and filename. Notice that the tracking channel will add "x.dat" where x is the channel number.
+Tracking.dump_filename=./tracking_ch_
+
+;#pll_bw_hz: PLL loop filter bandwidth [Hz]
+Tracking.pll_bw_hz=50.0;
+
+;#dll_bw_hz: DLL loop filter bandwidth [Hz]
+Tracking.dll_bw_hz=4.0;
+
+;#fll_bw_hz: FLL loop filter bandwidth [Hz]
+Tracking.fll_bw_hz=10.0;
+
+;#order: PLL/DLL loop filter order [2] or [3]
+Tracking.order=3;
+
+;#early_late_space_chips: correlator early-late space [chips]. Use [0.5]
+Tracking.early_late_space_chips=0.5;
+
+;######### TELEMETRY DECODER CONFIG ############
+;#implementation: Use [GPS_L1_CA_Telemetry_Decoder] for GPS L1 C/A.
+TelemetryDecoder.implementation=GPS_L1_CA_Telemetry_Decoder
+TelemetryDecoder.dump=false
+
+;######### OBSERVABLES CONFIG ############
+;#implementation: Use [GPS_L1_CA_Observables] for GPS L1 C/A.
+Observables.implementation=GPS_L1_CA_Observables
+
+;#dump: Enable or disable the Observables internal binary data file logging [true] or [false] 
+Observables.dump=false
+
+;#dump_filename: Log path and filename.
+Observables.dump_filename=./observables.dat
+
+
+;######### PVT CONFIG ############
+;#implementation: Position Velocity and Time (PVT) implementation algorithm: Use [GPS_L1_CA_PVT] in this version.
+PVT.implementation=GPS_L1_CA_PVT
+
+;#averaging_depth: Number of PVT observations in the moving average algorithm
+PVT.averaging_depth=10
+
+;#flag_average: Enables the PVT averaging between output intervals (arithmetic mean) [true] or [false] 
+PVT.flag_averaging=true
+
+;#output_rate_ms: Period between two PVT outputs. Notice that the minimum period is equal to the tracking integration time (for GPS CA L1 is 1ms) [ms]
+PVT.output_rate_ms=100;
+
+;#display_rate_ms: Position console print (std::out) interval [ms]. Notice that output_rate_ms<=display_rate_ms.
+PVT.display_rate_ms=500;
+
+;#dump: Enable or disable the PVT internal binary data file logging [true] or [false] 
+PVT.dump=false
+
+;#dump_filename: Log path and filename without extension. Notice that PVT will add ".dat" to the binary dump and ".kml" to GoogleEarth dump.
+PVT.dump_filename=./PVT
+
+;######### OUTPUT_FILTER CONFIG ############
+;# Receiver output filter: Leave this block disabled in this version
+OutputFilter.implementation=Null_Sink_Output_Filter
+OutputFilter.filename=data/gnss-sdr.dat
+OutputFilter.item_type=gr_complex
--- a/jamroot.jam
+++ b/jamroot.jam
@ -1,10 +1,13 @@
 import os ;

 local GN3S_DRIVER = [ os.environ GN3S_DRIVER ] ;
+local RTLSDR_DRIVER = [ os.environ RTLSDR_DRIVER ] ;
+
 module
 {
 	 #Global variable in the global module
     .GN3S_DRIVER = GN3S_DRIVER ;
+     .RTLSDR_DRIVER = RTLSDR_DRIVER ;
 }


@ -30,6 +33,12 @@ if ($(GN3S_DRIVER))
 	lib gr-gn3s ;
 }

+if ($(RTLSDR_DRIVER))
+{
+    echo "RTLSDR_DRIVER enabled" ;
+	lib gnuradio-osmosdr ;
+}
+
 project
 : usage-requirements <include>.
 ;
@ -77,6 +86,7 @@ project : requirements
 <include>$GNURADIO_ROOT/gnuradio-core/src/lib/gengen
 <include>$GNURADIO_ROOT/gr-uhd/include
 <include>$GNURADIO_ROOT/volk/lib
+<include>$OSMOSDR_ROOT/include/osmosdr
 <include>$(GTEST_DIR)/include
 <threading>multi 
 <toolset>darwin:<include>/opt/local/include ;
--- a/src/algorithms/signal_source/adapters/jamfile.jam
+++ b/src/algorithms/signal_source/adapters/jamfile.jam
@ -2,6 +2,7 @@ project : build-dir ../../../../build ;

 #ECHO Global: [ VARNAMES ] ;
 local GN3S_DRIVER = [ modules.peek : GN3S_DRIVER ] ; 
+local RTLSDR_DRIVER = [ modules.peek : RTLSDR_DRIVER ] ; 

 obj file_signal_source : file_signal_source.cc ;
 obj uhd_signal_source : uhd_signal_source.cc ;
@ -11,3 +12,7 @@ if ($(GN3S_DRIVER))
 	obj gn3s_signal_source : gn3s_signal_source.cc ;
 }

+if ($(RTLSDR_DRIVER))
+{
+	obj rtlsdr_signal_source : rtlsdr_signal_source.cc ;	
+}
--- a/src/algorithms/signal_source/adapters/rtlsdr_signal_source.cc
+++ b/src/algorithms/signal_source/adapters/rtlsdr_signal_source.cc
@ -0,0 +1,197 @@
+/*!
+ * \file rtlsdr_signal_source.cc
+ * \brief Signal source for the Realtek RTL2832U USB dongle DVB-T receiver
+ * (see http://sdr.osmocom.org/trac/wiki/rtl-sdr for more information)
+ * \author Javier Arribas, 2012. jarribas(at)cttc.es
+ *
+ * -------------------------------------------------------------------------
+ *
+ * Copyright (C) 2010-2012  (see AUTHORS file for a list of contributors)
+ *
+ * GNSS-SDR is a software defined Global Navigation
+ *          Satellite Systems receiver
+ *
+ * This file is part of GNSS-SDR.
+ *
+ * GNSS-SDR is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * at your option) any later version.
+ *
+ * GNSS-SDR is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * -------------------------------------------------------------------------
+ */
+
+#include "rtlsdr_signal_source.h"
+#include <osmosdr_api.h>
+#include <osmosdr_source_c.h>
+#include <gnuradio/gr_file_sink.h>
+#include "configuration_interface.h"
+#include "gnss_sdr_valve.h"
+#include <glog/log_severity.h>
+#include <glog/logging.h>
+#include <iostream>
+#include "GPS_L1_CA.h"
+#include <boost/format.hpp>
+
+using google::LogMessage;
+
+
+RtlsdrSignalSource::RtlsdrSignalSource(ConfigurationInterface* configuration,
+        std::string role, unsigned int in_stream, unsigned int out_stream,
+        gr_msg_queue_sptr queue) :
+        role_(role), in_stream_(in_stream), out_stream_(out_stream),
+        queue_(queue)
+{
+
+    // DUMP PARAMETERS
+    std::string empty = "";
+    std::string default_dump_file = "./data/signal_source.dat";
+    std::string default_item_type = "gr_complex";
+    samples_ = configuration->property(role + ".samples", 0);
+    dump_ = configuration->property(role + ".dump", false);
+    dump_filename_ = configuration->property(role + ".dump_filename",
+            default_dump_file);
+
+    // RTLSDR Driver parameters
+    AGC_enabled_=configuration->property(role + ".AGC_enabled",true);
+
+    freq_ = configuration->property(role + ".freq", GPS_L1_FREQ_HZ);
+    gain_ = configuration->property(role + ".gain", (double)50.0);
+    sample_rate_ = configuration->property(role + ".sampling_frequency", (double)2.0e6);
+
+    item_type_ = configuration->property(role + ".item_type",
+            default_item_type);
+    if (item_type_.compare("short") == 0)
+        {
+            item_size_ = sizeof(short);
+        }
+    else if (item_type_.compare("gr_complex") == 0)
+        {
+    	    item_size_ = sizeof(gr_complex);
+            // 1. Make the driver instance
+            rtlsdr_source_ = osmosdr_make_source_c();
+
+            // 2 set sampling rate
+            rtlsdr_source_->set_sample_rate(sample_rate_);
+            std::cout << boost::format("Actual RX Rate: %f [SPS]...") % (rtlsdr_source_->get_sample_rate()) << std::endl ;
+            DLOG(INFO) << boost::format("Actual RX Rate: %f [SPS]...") % (rtlsdr_source_->get_sample_rate()) << std::endl;
+
+            // 3. set rx frequency
+            rtlsdr_source_->set_center_freq(freq_);
+            std::cout << boost::format("Actual RX Freq: %f [Hz]...") % (rtlsdr_source_->get_center_freq()) << std::endl ;
+            DLOG(INFO) << boost::format("Actual RX Freq: %f [Hz]...") % (rtlsdr_source_->get_center_freq()) << std::endl ;
+
+            // TODO: Asign the remanent IF from the PLL tune error
+            std::cout << boost::format("PLL Frequency tune error %f [Hz]...") % (rtlsdr_source_->get_center_freq()-freq_) ;
+            DLOG(INFO) <<  boost::format("PLL Frequency tune error %f [Hz]...") % (rtlsdr_source_->get_center_freq()-freq_) ;
+
+            // 4. set rx gain
+            if (this->AGC_enabled_==true)
+            {
+            	rtlsdr_source_->set_gain_mode(true);
+            	std::cout << "AGC enabled"<< std::endl;
+            	DLOG(INFO)<< "AGC enabled"<< std::endl;
+            }else{
+            	rtlsdr_source_->set_gain_mode(false);
+                rtlsdr_source_->set_gain(gain_);
+                std::cout << boost::format("Actual RX Gain: %f dB...") % rtlsdr_source_->get_gain() << std::endl;
+                DLOG(INFO) << boost::format("Actual RX Gain: %f dB...") % rtlsdr_source_->get_gain() << std::endl;
+            }
+        }
+    else
+        {
+            LOG_AT_LEVEL(WARNING) << item_type_
+                    << " unrecognized item type. Using short.";
+            item_size_ = sizeof(short);
+        }
+
+    if (samples_ != 0)
+        {
+            DLOG(INFO) << "Send STOP signal after " << samples_ << " samples";
+            valve_ = gnss_sdr_make_valve(item_size_, samples_, queue_);
+            DLOG(INFO) << "valve(" << valve_->unique_id() << ")";
+        }
+
+    if (dump_)
+        {
+            DLOG(INFO) << "Dumping output into file " << dump_filename_;
+            file_sink_ = gr_make_file_sink(item_size_, dump_filename_.c_str());
+            DLOG(INFO) << "file_sink(" << file_sink_->unique_id() << ")";
+        }
+
+}
+
+RtlsdrSignalSource::~RtlsdrSignalSource()
+{
+}
+
+void RtlsdrSignalSource::connect(gr_top_block_sptr top_block)
+{
+
+    if (samples_ != 0)
+        {
+            top_block->connect(rtlsdr_source_, 0, valve_, 0);
+            DLOG(INFO) << "connected rtlsdr source to valve";
+
+            if (dump_)
+                {
+                    top_block->connect(valve_, 0, file_sink_, 0);
+                    DLOG(INFO) << "connected valve to file sink";
+                }
+        }
+    else
+        {
+            if (dump_)
+                {
+                    top_block->connect(rtlsdr_source_, 0, file_sink_, 0);
+                    DLOG(INFO) << "connected rtlsdr source to file sink";
+                }
+        }
+}
+
+void RtlsdrSignalSource::disconnect(gr_top_block_sptr top_block)
+{
+
+    if (samples_ != 0)
+        {
+            top_block->disconnect(rtlsdr_source_, 0, valve_, 0);
+
+            if (dump_)
+                {
+                    top_block->disconnect(valve_, 0, file_sink_, 0);
+                }
+        }
+    else
+        {
+            if (dump_)
+                {
+                    top_block->disconnect(rtlsdr_source_, 0, file_sink_, 0);
+                }
+        }
+}
+
+gr_basic_block_sptr RtlsdrSignalSource::get_left_block()
+{
+    LOG_AT_LEVEL(WARNING) << "Trying to get signal source left block.";
+    return gr_basic_block_sptr();
+}
+
+gr_basic_block_sptr RtlsdrSignalSource::get_right_block()
+{
+    if (samples_ != 0)
+        {
+            return valve_;
+        }
+    else
+        {
+            return rtlsdr_source_;
+        }
+}
--- a/src/algorithms/signal_source/adapters/rtlsdr_signal_source.h
+++ b/src/algorithms/signal_source/adapters/rtlsdr_signal_source.h
@ -0,0 +1,101 @@
+/*!
+ * \file rtlsdr_signal_source.h
+ * \brief Signal source for the Realtek RTL2832U USB dongle DVB-T receiver
+ * (see http://sdr.osmocom.org/trac/wiki/rtl-sdr for more information)
+ * \author Javier Arribas, 2012. jarribas(at)cttc.es
+ *
+ * -------------------------------------------------------------------------
+ *
+ * Copyright (C) 2010-2012  (see AUTHORS file for a list of contributors)
+ *
+ * GNSS-SDR is a software defined Global Navigation
+ *          Satellite Systems receiver
+ *
+ * This file is part of GNSS-SDR.
+ *
+ * GNSS-SDR is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * at your option) any later version.
+ *
+ * GNSS-SDR is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * -------------------------------------------------------------------------
+ */
+
+#ifndef GNSS_SDR_RTLSDR_SIGNAL_SOURCE_H_
+#define GNSS_SDR_RTLSDR_SIGNAL_SOURCE_H_
+
+#include <boost/shared_ptr.hpp>
+#include <osmosdr/osmosdr_source_c.h>
+#include <gnuradio/gr_hier_block2.h>
+#include <gnuradio/gr_msg_queue.h>
+#include "gnss_block_interface.h"
+
+class ConfigurationInterface;
+
+/*!
+ * \brief This class reads samples from Realtek RTL2832U USB dongle DVB-T receiver (see http://sdr.osmocom.org/trac/wiki/rtl-sdr)
+ */
+class RtlsdrSignalSource: public GNSSBlockInterface
+{
+
+public:
+	RtlsdrSignalSource(ConfigurationInterface* configuration,
+            std::string role, unsigned int in_stream,
+            unsigned int out_stream, gr_msg_queue_sptr queue);
+
+    virtual ~RtlsdrSignalSource();
+
+    std::string role()
+    {
+        return role_;
+    }
+    std::string implementation()
+    {
+        return "Rtlsdr_Signal_Source";
+    }
+    size_t item_size()
+    {
+        return item_size_;
+    }
+
+    void connect(gr_top_block_sptr top_block);
+    void disconnect(gr_top_block_sptr top_block);
+    gr_basic_block_sptr get_left_block();
+    gr_basic_block_sptr get_right_block();
+
+private:
+
+    std::string role_;
+
+    // UHD SETTINGS
+    bool AGC_enabled_;
+    double sample_rate_;
+
+    unsigned int in_stream_;
+    unsigned int out_stream_;
+
+    double freq_;
+    double gain_;
+
+    std::string item_type_;
+    size_t item_size_;
+    long samples_;
+    bool dump_;
+    std::string dump_filename_;
+
+    boost::shared_ptr<osmosdr_source_c> rtlsdr_source_;
+
+    gr_block_sptr valve_;
+    gr_block_sptr file_sink_;
+    gr_msg_queue_sptr queue_;
+};
+
+#endif /*GNSS_SDR_RTLSDR_SIGNAL_SOURCE_H_*/
--- a/src/core/receiver/gnss_block_factory.cc
+++ b/src/core/receiver/gnss_block_factory.cc
@ -64,6 +64,10 @@
 	#include "gn3s_signal_source.h"
 #endif

+#if RTLSDR_DRIVER
+	#include "rtlsdr_signal_source.h"
+#endif
+
 using google::LogMessage;


@ -290,6 +294,14 @@ GNSSBlockInterface* GNSSBlockFactory::GetBlock(
        }
 #endif

+#if RTLSDR_DRIVER
+        else if (implementation.compare("Rtlsdr_Signal_Source") == 0)
+        {
+            block = new RtlsdrSignalSource(configuration, role, in_streams,
+                    out_streams, queue);
+        }
+#endif
+
    // DATA TYPE ADAPTER -----------------------------------------------------------

    // INPUT FILTER ----------------------------------------------------------------
--- a/src/core/receiver/jamfile.jam
+++ b/src/core/receiver/jamfile.jam
@ -6,13 +6,18 @@ obj file_configuration : file_configuration.cc ;
 obj in_memory_configuration : in_memory_configuration.cc ;

 local GN3S_DRIVER = [ modules.peek : GN3S_DRIVER ] ; 
+local RTLSDR_DRIVER = [ modules.peek : RTLSDR_DRIVER ] ; 

-if $(GN3S_DRIVER)
+if ($(GN3S_DRIVER))
 {
-	obj gnss_block_factory : gnss_block_factory.cc : <define>GN3S_DRIVER ;
+	GN3S_DRIVER_DEFINE = "GN3S_DRIVER" ;
 }
-else
+
+if ($(RTLSDR_DRIVER))
 {
-	obj gnss_block_factory : gnss_block_factory.cc ;
+	RTLSDR_DRIVER_DEFINE = "RTLSDR_DRIVER" ;
 }
+
+obj gnss_block_factory : gnss_block_factory.cc : <define>$(GN3S_DRIVER_DEFINE) <define>$(RTLSDR_DRIVER_DEFINE) ;
+
 obj gnss_flowgraph : gnss_flowgraph.cc ;
--- a/src/main/jamfile.jam
+++ b/src/main/jamfile.jam
@ -1,9 +1,22 @@
 project : build-dir ../../build ;

 local GN3S_DRIVER = [ modules.peek : GN3S_DRIVER ] ; 
+local RTLSDR_DRIVER = [ modules.peek : RTLSDR_DRIVER ] ; 

-if $(GN3S_DRIVER)
+if ($(GN3S_DRIVER))
 {
+	GN3S_DRIVER_INCLUDE1 = "../algorithms/signal_source/adapters//gn3s_signal_source" ;
+	GN3S_DRIVER_INCLUDE2 = "../..//gr-gn3s" ;
+}
+
+if ($(RTLSDR_DRIVER))
+{
+	RTLSDR_DRIVER_INCLUDE1 = "../algorithms/signal_source/adapters//rtlsdr_signal_source" ;
+	RTLSDR_DRIVER_INCLUDE2 = "../..//gnuradio-osmosdr" ;
+}
+
+#echo $(GN3S_DRIVER_INCLUDE1)
+#echo $(GN3S_DRIVER_INCLUDE2)

 exe gnss-sdr : main.cc
 ../algorithms/acquisition/adapters//gps_l1_ca_pcps_acquisition
@ -68,74 +81,10 @@ exe gnss-sdr : main.cc
 ../..//uhd
 ../..//gnuradio-uhd 
 # GN3S DRIVER
-../algorithms/signal_source/adapters//gn3s_signal_source 
-../..//gr-gn3s ;
-
-}
-else
-{
-exe gnss-sdr : main.cc
-../algorithms/acquisition/adapters//gps_l1_ca_pcps_acquisition
-../algorithms/acquisition/adapters//galileo_e1_pcps_ambiguous_acquisition
-../algorithms/acquisition/gnuradio_blocks//pcps_acquisition_cc
-../algorithms/channel/adapters//channel
-../algorithms/channel/libs//gps_l1_ca_channel_fsm
-../algorithms/conditioner/adapters//signal_conditioner
-../algorithms/input_filter/adapters//fir_filter
-../algorithms/input_filter/adapters//freq_xlating_fir_filter
-../algorithms/libs//gnss_signal_processing
-../algorithms/libs//gps_sdr_signal_processing
-../algorithms/libs//galileo_e1_signal_processing
-../algorithms/libs//gnss_sdr_valve
-../algorithms/libs//pass_through
-../algorithms/observables/adapters//gps_l1_ca_observables
-../algorithms/observables/gnuradio_blocks//gps_l1_ca_observables_cc
-../algorithms/PVT/libs//rinex_printer
-../algorithms/PVT/libs//kml_printer
-../algorithms/PVT/libs//gps_l1_ca_ls_pvt
-../algorithms/output_filter/adapters//file_output_filter
-../algorithms/output_filter/adapters//null_sink_output_filter
-../algorithms/resampler/adapters//direct_resampler_conditioner
-../algorithms/resampler/gnuradio_blocks//direct_resampler_conditioner_cc
-../algorithms/signal_source/adapters//file_signal_source
-../algorithms/signal_source/adapters//uhd_signal_source
-../algorithms/telemetry_decoder/adapters//gps_l1_ca_telemetry_decoder
-../algorithms/telemetry_decoder/gnuradio_blocks//gps_l1_ca_telemetry_decoder_cc
-../algorithms/telemetry_decoder/libs//gps_l1_ca_subframe_fsm
-../algorithms/PVT/adapters//gps_l1_ca_pvt
-../algorithms/PVT/gnuradio_blocks//gps_l1_ca_pvt_cc
-../algorithms/tracking/adapters//gps_l1_ca_dll_pll_tracking
-../algorithms/tracking/adapters//gps_l1_ca_dll_fll_pll_tracking
-../algorithms/tracking/adapters//gps_l1_ca_tcp_connector_tracking
-../algorithms/tracking/gnuradio_blocks//gps_l1_ca_dll_pll_tracking_cc
-../algorithms/tracking/gnuradio_blocks//gps_l1_ca_dll_fll_pll_tracking_cc
-../algorithms/tracking/gnuradio_blocks//gps_l1_ca_tcp_connector_tracking_cc
-../algorithms/tracking/libs//tracking_discriminators
-../algorithms/tracking/libs//CN_estimators
-../algorithms/tracking/libs//tracking_FLL_PLL_filter
-../algorithms/tracking/libs//tracking_2nd_PLL_filter
-../algorithms/tracking/libs//tracking_2nd_DLL_filter
-../algorithms/tracking/libs//correlator
-../algorithms/tracking/libs//cordic
-../algorithms/tracking/libs//tcp_communication
-../core/libs//INIReader
-../core/libs//ini
-../core/libs//string_converter
-../core/receiver//control_message_factory
-../core/receiver//control_thread
-../core/receiver//file_configuration
-../core/receiver//in_memory_configuration
-../core/receiver//gnss_block_factory
-../core/receiver//gnss_flowgraph
-../core/system_parameters//gps_navigation_message
-../core/system_parameters//gnss_satellite
-../core/system_parameters//gnss_signal
-#../core/system_parameters//gnss_synchro
-../..//gflags
-../..//glog
-../..//gnuradio-core
-../..//uhd
-../..//gnuradio-uhd ;
-}
+$(GN3S_DRIVER_INCLUDE1)
+$(GN3S_DRIVER_INCLUDE2)
+# RTLSDR DRIVER
+$(RTLSDR_DRIVER_INCLUDE1)
+$(RTLSDR_DRIVER_INCLUDE2) ;

 install ../../install : gnss-sdr ;
--- a/src/tests/jamfile.jam
+++ b/src/tests/jamfile.jam
@ -1,9 +1,19 @@
 project : build-dir ../../build ;

 local GN3S_DRIVER = [ modules.peek : GN3S_DRIVER ] ; 
+local RTLSDR_DRIVER = [ modules.peek : RTLSDR_DRIVER ] ; 

-if $(GN3S_DRIVER)
+if ($(GN3S_DRIVER))
 {
+	GN3S_DRIVER_INCLUDE1 = "../algorithms/signal_source/adapters//gn3s_signal_source" ;
+	GN3S_DRIVER_INCLUDE2 = "../..//gr-gn3s" ;
+}
+
+if ($(RTLSDR_DRIVER))
+{
+	RTLSDR_DRIVER_INCLUDE1 = "../algorithms/signal_source/adapters//rtlsdr_signal_source" ;
+	RTLSDR_DRIVER_INCLUDE2 = "../..//gnuradio-osmosdr" ;
+}

 exe run_tests : test_main.cc 
 ../algorithms/acquisition/adapters//gps_l1_ca_pcps_acquisition
@ -68,76 +78,11 @@ exe run_tests : test_main.cc
 ../..//uhd
 ../..//gnuradio-uhd
 # GN3S DRIVER
-../algorithms/signal_source/adapters//gn3s_signal_source 
-../..//gr-gn3s
+$(GN3S_DRIVER_INCLUDE1)
+$(GN3S_DRIVER_INCLUDE2)
+# RTLSDR DRIVER
+$(RTLSDR_DRIVER_INCLUDE1)
+$(RTLSDR_DRIVER_INCLUDE2)
 ../..//gtest : <include>$(GTEST_DIR)/include ;

-}
-else
-{
-exe run_tests : test_main.cc 
-../algorithms/acquisition/adapters//gps_l1_ca_pcps_acquisition
-../algorithms/acquisition/adapters//galileo_e1_pcps_ambiguous_acquisition
-../algorithms/acquisition/gnuradio_blocks//pcps_acquisition_cc
-../algorithms/channel/adapters//channel
-../algorithms/channel/libs//gps_l1_ca_channel_fsm
-../algorithms/conditioner/adapters//signal_conditioner
-../algorithms/input_filter/adapters//fir_filter
-../algorithms/input_filter/adapters//freq_xlating_fir_filter
-../algorithms/libs//gnss_signal_processing
-../algorithms/libs//gps_sdr_signal_processing
-../algorithms/libs//galileo_e1_signal_processing
-../algorithms/libs//gnss_sdr_valve
-../algorithms/libs//pass_through
-../algorithms/observables/adapters//gps_l1_ca_observables
-../algorithms/observables/gnuradio_blocks//gps_l1_ca_observables_cc
-../algorithms/PVT/libs//rinex_printer
-../algorithms/PVT/libs//kml_printer
-../algorithms/PVT/libs//gps_l1_ca_ls_pvt
-../algorithms/output_filter/adapters//file_output_filter
-../algorithms/output_filter/adapters//null_sink_output_filter
-../algorithms/resampler/adapters//direct_resampler_conditioner
-../algorithms/resampler/gnuradio_blocks//direct_resampler_conditioner_cc
-../algorithms/signal_source/adapters//file_signal_source
-../algorithms/signal_source/adapters//uhd_signal_source
-../algorithms/telemetry_decoder/adapters//gps_l1_ca_telemetry_decoder
-../algorithms/telemetry_decoder/gnuradio_blocks//gps_l1_ca_telemetry_decoder_cc
-../algorithms/telemetry_decoder/libs//gps_l1_ca_subframe_fsm
-../algorithms/PVT/adapters//gps_l1_ca_pvt
-../algorithms/PVT/gnuradio_blocks//gps_l1_ca_pvt_cc
-../algorithms/tracking/adapters//gps_l1_ca_dll_pll_tracking
-../algorithms/tracking/adapters//gps_l1_ca_dll_fll_pll_tracking
-../algorithms/tracking/adapters//gps_l1_ca_tcp_connector_tracking
-../algorithms/tracking/gnuradio_blocks//gps_l1_ca_dll_pll_tracking_cc
-../algorithms/tracking/gnuradio_blocks//gps_l1_ca_dll_fll_pll_tracking_cc
-../algorithms/tracking/gnuradio_blocks//gps_l1_ca_tcp_connector_tracking_cc
-../algorithms/tracking/libs//tracking_discriminators
-../algorithms/tracking/libs//CN_estimators
-../algorithms/tracking/libs//tracking_FLL_PLL_filter
-../algorithms/tracking/libs//tracking_2nd_PLL_filter
-../algorithms/tracking/libs//tracking_2nd_DLL_filter
-../algorithms/tracking/libs//correlator
-../algorithms/tracking/libs//cordic
-../algorithms/tracking/libs//tcp_communication
-../core/libs//INIReader
-../core/libs//ini
-../core/libs//string_converter
-../core/receiver//control_message_factory
-../core/receiver//control_thread
-../core/receiver//file_configuration
-../core/receiver//in_memory_configuration
-../core/receiver//gnss_block_factory
-../core/receiver//gnss_flowgraph
-../core/system_parameters//gps_navigation_message
-../core/system_parameters//gnss_satellite
-../core/system_parameters//gnss_signal
-#../core/system_parameters//gnss_synchro
-../..//gflags
-../..//glog
-../..//gnuradio-core
-../..//uhd
-../..//gnuradio-uhd
-../..//gtest : <include>$(GTEST_DIR)/include ;
-}
-
 install ../../install : run_tests ;
--- a/src/utils/matlab/gps_l1_ca_dll_pll_plot_sample.m
+++ b/src/utils/matlab/gps_l1_ca_dll_pll_plot_sample.m
@ -30,7 +30,7 @@
 close all;
 clear all;
 samplingFreq       = 64e6/16;     %[Hz]
-channels=6;
+channels=4;
 path='/home/javier/workspace/gnss-sdr/trunk/install/';
 clear PRN_absolute_sample_start;
 for N=1:1:channels