Merge pull request #1 from osqzss/master

update
2016-07-10 18:45:51 +08:00 · 2016-07-10 18:45:51 +08:00 · b96ca814f2
commit b96ca814f2
parent ccbb0baba0 697946701a
16 changed files with 6188 additions and 1840 deletions
--- a/5
+++ b/5
@ -5,8 +5,8 @@ all: gps-sdr-sim

 SHELL=/bin/bash
 CC=gcc
-CFLAGS=-fopenmp -O3 -Wall
-LDFLAGS=-lm -fopenmp
+CFLAGS=-O3 -Wall
+LDFLAGS=-lm

 gps-sdr-sim: gpssim.o
 	${CC} $< ${LDFLAGS} -o $@
@ -15,5 +15,6 @@ clean:
 	rm -f gpssim.o gps-sdr-sim *.bin

 time: gps-sdr-sim
+	time ./gps-sdr-sim -e brdc3540.14n -u circle.csv -b 1
 	time ./gps-sdr-sim -e brdc3540.14n -u circle.csv -b 8
 	time ./gps-sdr-sim -e brdc3540.14n -u circle.csv -b 16
--- a/README.md
+++ b/README.md
@ -10,15 +10,12 @@ to RF using software-defined radio (SDR) platforms, such as
 2. Create an empty project for a console application.
 3. On the Solution Explorer at right, add "gpssim.c" and "getopt.c" to the Souce Files folder.
 4. Select "Release" in Solution Configurations drop-down list.
-5. Open the Property Pages dialog box and expand the Configuration Properties.
-6. Expand the C/C++ node and select the Language property page.
-7. Enable the OpenMP Support (/openmp).
-8. Build the solution.
+5. Build the solution.

 ### Building with GCC

 ```
-$ gcc gpssim.c -lm -fopenmp -o gps-sdr-sim
+$ gcc gpssim.c -lm -O3 -o gps-sdr-sim
 ```

 ### Generating the GPS signal file
@ -40,11 +37,23 @@ then used to generate the digitized I/Q samples for the GPS signal.

 The bladeRF command line interface requires I/Q pairs stored as signed 
 16-bit integers, while the hackrf_transfer and gps-sdr-sim-uhd.py
-supports signed bytes.
+support signed bytes.

 HackRF and bladeRF require 2.6 MHz sample rate, while the USRP2 requires
 2.5 MHz (an even integral decimator of 100 MHz).

+The simulation start time can be specified if the corresponding set of ephemerides
+is available. Otherwise the first time of ephemeris in the RINEX navigation file
+is selected.
+
+The maximum simulation duration time is defined by USER_MOTION_SIZE to 
+prevent the output file from getting too large.
+
+The output file size can be reduced by using "-b 1" option to store 
+four 1-bit I/Q samples into a single byte. 
+You can use [bladeplayer](https://github.com/osqzss/gps-sdr-sim/tree/master/player)
+for bladeRF to playback the compressed file.
+
 ```
 Usage: gps-sdr-sim [options]
 Options:
@ -52,23 +61,26 @@ Options:
  -u <user_motion> User motion file (dynamic mode)
  -g <nmea_gga>    NMEA GGA stream (dynamic mode)
  -l <location>    Lat,Lon,Hgt (static mode) e.g. 30.286502,120.032669,100
+  -t <date,time>   Scenario start time YYYY/MM/DD,hh:mm:ss
+  -d <duration>    Duration [sec] (max: 300)
  -o <output>      I/Q sampling data file (default: gpssim.bin)
  -s <frequency>   Sampling frequency [Hz] (default: 2600000)
-  -b <iq_bits>     I/Q data format [8/16] (default: 8)
+  -b <iq_bits>     I/Q data format [1/8/16] (default: 16)
+  -v               Show details about simulated channels
 ```

 The user motion can be specified in either dynamic or static mode:

 ```
-> gps-sdr-sim -e brdc3540.14n -u circle.csv -b 16
+> gps-sdr-sim -e brdc3540.14n -u circle.csv
 ```

 ```
-> gps-sdr-sim -e brdc3540.14n -g triumphv3.txt -b 16
+> gps-sdr-sim -e brdc3540.14n -g triumphv3.txt
 ```

 ```
-> gps-sdr-sim -e brdc3540.14n -l 30.286502,120.032669,100 -b 16
+> gps-sdr-sim -e brdc3540.14n -l 30.286502,120.032669,100
 ```

 ### Transmitting the samples
--- a/extclk/Readme.md
+++ b/extclk/Readme.md
@ -0,0 +1,21 @@
+# HackRF External TCXO
+
+### Gerber Files
+
+| File       | Layer                   |
+|:-----------|:------------------------|
+| extclk.GTL | Top layer               |
+| extclk.GBL | Bottom layer            |
+| extclk.GTS | Top solder stop mask    |
+| extclk.GBS | Bottom solder stop mask |
+| extclk.GTO | Top silk mask           |
+| extclk.TXT | NC Drill                |
+| extclk.GML | Mechanical layer        |
+
+### BOM (bill of material)
+
+| Part | Value |
+|:-----|:------|
+|X1    |[FOX924B-10.000](http://www.digikey.com/product-detail/en/FOX924B-10.000/631-1067-1-ND/1024772), TCXO 10MHz HCMOS 2.5ppm|
+|C1    |CAP 1uF 0805|
+|C2    |OPEN|
--- a/extclk/extclk.GBL
+++ b/extclk/extclk.GBL
@ -0,0 +1,720 @@
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+X003556Y007422D01*
+X003619Y007269D01*
+X003736Y007152D01*
+X003889Y007089D01*
+X004054Y007089D01*
+X004104Y007110D02*
+X004839Y007110D01*
+X004889Y007089D02*
+X005054Y007089D01*
+X005206Y007152D01*
+X005323Y007269D01*
+X005386Y007422D01*
+X005386Y007587D01*
+X005323Y007739D01*
+X005206Y007856D01*
+X005054Y007919D01*
+X004889Y007919D01*
+X004736Y007856D01*
+X004619Y007739D01*
+X004556Y007587D01*
+X004556Y007422D01*
+X004619Y007269D01*
+X004736Y007152D01*
+X004889Y007089D01*
+X004701Y007187D02*
+X004241Y007187D01*
+X004318Y007264D02*
+X004624Y007264D01*
+X004589Y007342D02*
+X004353Y007342D01*
+X004385Y007419D02*
+X004557Y007419D01*
+X004556Y007496D02*
+X004386Y007496D01*
+X004386Y007573D02*
+X004556Y007573D01*
+X004583Y007651D02*
+X004360Y007651D01*
+X004328Y007728D02*
+X004615Y007728D01*
+X004686Y007805D02*
+X004257Y007805D01*
+X004142Y007883D02*
+X004801Y007883D01*
+X005142Y007883D02*
+X005463Y007883D01*
+X005463Y007960D02*
+X000724Y007960D01*
+X000724Y008037D02*
+X005463Y008037D01*
+X005463Y008114D02*
+X000724Y008114D01*
+X000724Y008192D02*
+X005463Y008192D01*
+X005463Y008269D02*
+X000724Y008269D01*
+X000724Y008346D02*
+X005463Y008346D01*
+X005463Y008424D02*
+X000724Y008424D01*
+X000724Y008501D02*
+X005463Y008501D01*
+X005463Y008578D02*
+X000724Y008578D01*
+X000724Y008655D02*
+X005463Y008655D01*
+X005463Y008733D02*
+X000724Y008733D01*
+X000724Y007883D02*
+X003801Y007883D01*
+X003686Y007805D02*
+X000724Y007805D01*
+X000724Y007728D02*
+X003615Y007728D01*
+X003583Y007651D02*
+X000724Y007651D01*
+X000724Y007573D02*
+X003556Y007573D01*
+X003556Y007496D02*
+X000724Y007496D01*
+X000724Y007419D02*
+X003557Y007419D01*
+X003589Y007342D02*
+X000724Y007342D01*
+X000724Y007264D02*
+X003624Y007264D01*
+X003701Y007187D02*
+X000724Y007187D01*
+X000724Y007110D02*
+X003839Y007110D01*
+X003789Y006878D02*
+X000724Y006878D01*
+X000724Y006955D02*
+X005463Y006955D01*
+X005463Y006878D02*
+X005153Y006878D01*
+X005261Y006801D02*
+X005463Y006801D01*
+X005463Y006723D02*
+X005330Y006723D01*
+X005361Y006646D02*
+X005463Y006646D01*
+X005463Y006569D02*
+X005386Y006569D01*
+X005386Y006491D02*
+X005463Y006491D01*
+X005463Y006414D02*
+X005383Y006414D01*
+X005351Y006337D02*
+X005463Y006337D01*
+X005463Y006260D02*
+X005314Y006260D01*
+X005236Y006182D02*
+X005463Y006182D01*
+X005463Y005951D02*
+X000724Y005951D01*
+X000724Y006182D02*
+X003706Y006182D01*
+X003629Y006260D02*
+X000724Y006260D01*
+X000724Y006337D02*
+X003591Y006337D01*
+X003559Y006414D02*
+X000724Y006414D01*
+X000724Y006491D02*
+X003556Y006491D01*
+X003556Y006569D02*
+X000724Y006569D01*
+X000724Y006646D02*
+X003581Y006646D01*
+X003613Y006723D02*
+X000724Y006723D01*
+X000724Y006801D02*
+X003681Y006801D01*
+X005104Y007110D02*
+X005463Y007110D01*
+X005463Y007187D02*
+X005241Y007187D01*
+X005318Y007264D02*
+X005463Y007264D01*
+X005463Y007342D02*
+X005353Y007342D01*
+X005385Y007419D02*
+X005463Y007419D01*
+X005463Y007496D02*
+X005386Y007496D01*
+X005386Y007573D02*
+X005463Y007573D01*
+X005463Y007651D02*
+X005360Y007651D01*
+X005328Y007728D02*
+X005463Y007728D01*
+X005463Y007805D02*
+X005257Y007805D01*
+X005463Y007032D02*
+X000724Y007032D01*
+X000724Y004018D02*
+X005463Y004018D01*
+X005463Y003941D02*
+X000724Y003941D01*
+X000724Y003864D02*
+X003755Y003864D01*
+X003667Y003787D02*
+X000724Y003787D01*
+X000724Y003709D02*
+X003607Y003709D01*
+X003575Y003632D02*
+X000724Y003632D01*
+X000724Y003555D02*
+X003556Y003555D01*
+X003556Y003477D02*
+X000724Y003477D01*
+X000724Y003400D02*
+X003565Y003400D01*
+X003597Y003323D02*
+X000724Y003323D01*
+X000724Y003246D02*
+X003643Y003246D01*
+X003720Y003168D02*
+X000724Y003168D01*
+X000724Y003091D02*
+X003884Y003091D01*
+X005228Y003864D02*
+X005463Y003864D01*
+X005463Y003787D02*
+X005306Y003787D01*
+X005358Y003709D02*
+X005463Y003709D01*
+X005463Y003632D02*
+X005390Y003632D01*
+X005407Y003555D02*
+X005463Y003555D01*
+M02*
--- a/extclk/extclk.GBS
+++ b/extclk/extclk.GBS
@ -0,0 +1,31 @@
+G75*
+G70*
+%OFA0B0*%
+%FSLAX24Y24*%
+%IPPOS*%
+%LPD*%
+%AMOC8*
+5,1,8,0,0,1.08239X$1,22.5*
+%
+%ADD10C,0.0000*%
+%ADD11C,0.0634*%
+D10*
+X000534Y001854D02*
+X000534Y008941D01*
+X005652Y008941D01*
+X005652Y001854D01*
+X000534Y001854D01*
+D11*
+X003971Y002504D03*
+X003971Y003504D03*
+X003971Y004504D03*
+X003971Y005504D03*
+X003971Y006504D03*
+X003971Y007504D03*
+X004971Y007504D03*
+X004971Y006504D03*
+X004971Y005504D03*
+X004971Y004504D03*
+X004971Y003504D03*
+X004971Y002504D03*
+M02*
--- a/extclk/extclk.GML
+++ b/extclk/extclk.GML
@ -0,0 +1,17 @@
+G75*
+G70*
+%OFA0B0*%
+%FSLAX24Y24*%
+%IPPOS*%
+%LPD*%
+%AMOC8*
+5,1,8,0,0,1.08239X$1,22.5*
+%
+%ADD10C,0.0000*%
+D10*
+X000534Y001854D02*
+X000534Y008941D01*
+X005652Y008941D01*
+X005652Y001854D01*
+X000534Y001854D01*
+M02*
--- a/extclk/extclk.GTL
+++ b/extclk/extclk.GTL
--- a/extclk/extclk.GTO
+++ b/extclk/extclk.GTO
@ -0,0 +1,109 @@
+G75*
+G70*
+%OFA0B0*%
+%FSLAX24Y24*%
+%IPPOS*%
+%LPD*%
+%AMOC8*
+5,1,8,0,0,1.08239X$1,22.5*
+%
+%ADD10C,0.0000*%
+%ADD11C,0.0079*%
+%ADD12C,0.0080*%
+D10*
+X000534Y001854D02*
+X000534Y008941D01*
+X005652Y008941D01*
+X005652Y001854D01*
+X000534Y001854D01*
+D11*
+X001400Y003075D02*
+X002818Y003075D01*
+X002818Y003784D01*
+X001400Y003784D01*
+X001400Y003075D01*
+X002030Y004414D02*
+X002188Y004414D01*
+X002739Y005063D02*
+X002739Y005732D01*
+X002188Y006382D02*
+X002030Y006382D01*
+X001479Y005732D02*
+X001479Y005063D01*
+X001400Y007012D02*
+X002818Y007012D01*
+X002818Y007721D01*
+X001400Y007721D01*
+X001400Y007012D01*
+X003096Y004591D02*
+X003098Y004606D01*
+X003104Y004620D01*
+X003114Y004632D01*
+X003126Y004641D01*
+X003141Y004646D01*
+X003156Y004647D01*
+X003171Y004644D01*
+X003184Y004637D01*
+X003195Y004626D01*
+X003203Y004613D01*
+X003207Y004599D01*
+X003207Y004583D01*
+X003203Y004569D01*
+X003195Y004556D01*
+X003184Y004545D01*
+X003171Y004538D01*
+X003156Y004535D01*
+X003141Y004536D01*
+X003126Y004541D01*
+X003114Y004550D01*
+X003104Y004562D01*
+X003098Y004576D01*
+X003096Y004591D01*
+X003471Y007004D02*
+X004471Y007004D01*
+X004471Y008004D01*
+X005471Y008004D01*
+X005471Y002004D01*
+X003471Y002004D01*
+X003471Y007004D01*
+X003471Y008004D01*
+X004471Y008004D01*
+D12*
+X001163Y007663D02*
+X001163Y007454D01*
+X000954Y007663D01*
+X000902Y007663D01*
+X000850Y007611D01*
+X000850Y007506D01*
+X000902Y007454D01*
+X000902Y007301D02*
+X000850Y007248D01*
+X000850Y007144D01*
+X000902Y007091D01*
+X001111Y007091D01*
+X001163Y007144D01*
+X001163Y007248D01*
+X001111Y007301D01*
+X001163Y005754D02*
+X001163Y005544D01*
+X001163Y005649D02*
+X000850Y005649D01*
+X000954Y005544D01*
+X000850Y005391D02*
+X001163Y005182D01*
+X001163Y005391D02*
+X000850Y005182D01*
+X001163Y003726D02*
+X001163Y003517D01*
+X001163Y003621D02*
+X000850Y003621D01*
+X000954Y003517D01*
+X000902Y003364D02*
+X000850Y003311D01*
+X000850Y003207D01*
+X000902Y003154D01*
+X001111Y003154D01*
+X001163Y003207D01*
+X001163Y003311D01*
+X001111Y003364D01*
+M02*
--- a/extclk/extclk.GTS
+++ b/extclk/extclk.GTS
@ -0,0 +1,43 @@
+G75*
+G70*
+%OFA0B0*%
+%FSLAX24Y24*%
+%IPPOS*%
+%LPD*%
+%AMOC8*
+5,1,8,0,0,1.08239X$1,22.5*
+%
+%ADD10C,0.0000*%
+%ADD11C,0.0634*%
+%ADD12R,0.0434X0.0532*%
+%ADD13R,0.0631X0.0749*%
+D10*
+X000534Y001854D02*
+X000534Y008941D01*
+X005652Y008941D01*
+X005652Y001854D01*
+X000534Y001854D01*
+D11*
+X003971Y002504D03*
+X003971Y003504D03*
+X003971Y004504D03*
+X003971Y005504D03*
+X003971Y006504D03*
+X003971Y007504D03*
+X004971Y007504D03*
+X004971Y006504D03*
+X004971Y005504D03*
+X004971Y004504D03*
+X004971Y003504D03*
+X004971Y002504D03*
+D12*
+X002503Y003429D03*
+X001715Y003429D03*
+X001715Y007366D03*
+X002503Y007366D03*
+D13*
+X002640Y006225D03*
+X001577Y006225D03*
+X001577Y004571D03*
+X002640Y004571D03*
+M02*
--- a/extclk/extclk.TXT
+++ b/extclk/extclk.TXT
@ -0,0 +1,27 @@
+%
+M48
+M72
+T01C0.0157
+T02C0.0394
+%
+T01
+X1322Y2445
+X3133Y3390
+X3172Y5358
+X3133Y7366
+X1322Y8351
+X5022Y8351
+T02
+X4971Y7504
+X4971Y6504
+X4971Y5504
+X4971Y4504
+X4971Y3504
+X4971Y2504
+X3971Y2504
+X3971Y3504
+X3971Y4504
+X3971Y5504
+X3971Y6504
+X3971Y7504
+M30
--- a/extclk/hackrf_gpssim.jpg
+++ b/extclk/hackrf_gpssim.jpg
--- a/extclk/hackrf_tcxo.jpg
+++ b/extclk/hackrf_tcxo.jpg
--- a/gpssim.c
+++ b/gpssim.c
--- a/gpssim.h
+++ b/gpssim.h
@ -0,0 +1,155 @@
+#ifndef GPSSIM_H
+#define GPSSIM_H
+
+#define TRUE	(1)
+#define FALSE	(0)
+
+/*! \brief Maximum length of a line in a text file (RINEX, motion) */
+#define MAX_CHAR (100)
+
+/*! \brief Maximum number of satellites in RINEX file */
+#define MAX_SAT (32)
+
+/*! \brief Maximum number of channels we simulate */
+#define MAX_CHAN (16)
+
+/*! \brief Maximum number of user motion points */
+#define USER_MOTION_SIZE (3000) // max duration at 10Hz
+
+/*! \brief Number of subframes */
+#define N_SBF (5) // 5 subframes per frame
+
+/*! \brief Number of words per subframe */
+#define N_DWRD_SBF (10) // 10 word per subframe
+
+/*! \brief Number of words */
+#define N_DWRD ((N_SBF+1)*N_DWRD_SBF) // Subframe word buffer size
+
+/*! \brief C/A code sequence length */
+#define CA_SEQ_LEN (1023)
+
+#define SECONDS_IN_WEEK 604800.0
+#define SECONDS_IN_HALF_WEEK 302400.0
+#define SECONDS_IN_DAY 86400.0
+#define SECONDS_IN_HOUR 3600.0
+#define SECONDS_IN_MINUTE 60.0
+
+#define POW2_M5  0.03125
+#define POW2_M19 1.907348632812500e-6
+#define POW2_M29 1.862645149230957e-9
+#define POW2_M31 4.656612873077393e-10
+#define POW2_M33 1.164153218269348e-10
+#define POW2_M43 1.136868377216160e-13
+#define POW2_M55 2.775557561562891e-17
+
+// Conventional values employed in GPS ephemeris model (ICD-GPS-200)
+#define GM_EARTH 3.986005e14
+#define OMEGA_EARTH 7.2921151467e-5
+#define PI 3.1415926535898
+
+#define WGS84_RADIUS	6378137.0
+#define WGS84_ECCENTRICITY 0.0818191908426
+
+#define R2D 57.2957795131
+
+#define SPEED_OF_LIGHT 2.99792458e8
+#define LAMBDA_L1 0.190293672798365
+
+/*! \brief GPS L1 Carrier frequency */
+#define CARR_FREQ (1575.42e6)
+/*! \brief C/A code frequency */
+#define CODE_FREQ (1.023e6)
+#define CARR_TO_CODE (1.0/1540.0)
+
+// Sampling data format
+#define SC01 (1)
+#define SC08 (8)
+#define SC16 (16)
+
+#define EPHEM_ARRAY_SIZE (13) // for daily GPS broadcast ephemers file (brdc)
+
+/*! \brief Structure representing GPS time */
+typedef struct
+{
+	int week;	/*!< GPS week number (since January 1980) */
+	double sec; 	/*!< second inside the GPS \a week */
+} gpstime_t;
+
+/*! \brief Structure repreenting UTC time */
+typedef struct
+{
+	int y; 		/*!< Calendar year */
+	int m;		/*!< Calendar month */
+	int d;		/*!< Calendar day */
+	int hh;		/*!< Calendar hour */
+	int mm;		/*!< Calendar minutes */
+	double sec;	/*!< Calendar seconds */
+} datetime_t;
+
+/*! \brief Structure representing ephemeris of a single satellite */
+typedef struct
+{
+	int vflg;	/*!< Valid Flag */
+	datetime_t t;
+	gpstime_t toc;	/*!< Time of Clock */
+	gpstime_t toe;	/*!< Time of Ephemeris */
+	int iodc;	/*!< Issue of Data, Clock */
+	int iode;	/*!< Isuse of Data, Ephemeris */
+	double deltan;	/*!< Delta-N (radians/sec) */
+	double cuc;	/*!< Cuc (radians) */
+	double cus;	/*!< Cus (radians) */
+	double cic;	/*!< Correction to inclination cos (radians) */
+	double cis;	/*!< Correction to inclination sin (radians) */
+	double crc;	/*!< Correction to radius cos (meters) */
+	double crs;	/*!< Correction to radius sin (meters) */
+	double ecc;	/*!< e Eccentricity */
+	double sqrta;	/*!< sqrt(A) (sqrt(m)) */
+	double m0;	/*!< Mean anamoly (radians) */
+	double omg0;	/*!< Longitude of the ascending node (radians) */
+	double inc0;	/*!< Inclination (radians) */
+	double aop;
+	double omgdot;	/*!< Omega dot (radians/s) */
+	double idot;	/*!< IDOT (radians/s) */
+	double af0;	/*!< Clock offset (seconds) */
+	double af1;	/*!< rate (sec/sec) */
+	double af2;	/*!< acceleration (sec/sec^2) */
+	double tgd;	/*!< Group delay L2 bias */
+	// Working variables follow
+	double n; 	/*!< Mean motion (Average angular velocity) */
+	double sq1e2;	/*!< sqrt(1-e^2) */
+	double A;	/*!< Semi-major axis */
+	double omgkdot; /*!< OmegaDot-OmegaEdot */
+} ephem_t;
+
+typedef struct
+{
+	gpstime_t g;
+	double range; // pseudorange
+	double rate;
+	double d; // geometric distance
+	double azel[2];
+} range_t;
+
+/*! \brief Structure representing a Channel */
+typedef struct
+{
+	int prn;	/*< PRN Number */
+	int ca[CA_SEQ_LEN]; /*< C/A Sequence */
+	double f_carr;	/*< Carrier frequency */
+	double f_code;	/*< Code frequency */
+	unsigned int carr_phase; /*< Carrier phase */
+	int carr_phasestep;	/*< Carrier phasestep */
+	double code_phase; /*< Code phase */
+	gpstime_t g0;	/*!< GPS time at start */
+	unsigned long sbf[5][N_DWRD_SBF]; /*!< current subframe */
+	unsigned long dwrd[N_DWRD]; /*!< Data words of sub-frame */
+	int iword;	/*!< initial word */
+	int ibit;	/*!< initial bit */
+	int icode;	/*!< initial code */
+	int dataBit;	/*!< current data bit */
+	int codeCA;	/*!< current C/A code */
+	double azel[2];
+	range_t rho0;
+} channel_t;
+
+#endif
--- a/player/bladeplayer.c
+++ b/player/bladeplayer.c
@ -2,7 +2,13 @@

 #include <stdlib.h>
 #include <stdio.h>
+#include <string.h>
 #include <libbladeRF.h>
+#ifdef _WIN32
+#include "getopt.h"
+#else
+#include <unistd.h>
+#endif

 #define TX_FREQUENCY    1575420000
 #define TX_SAMPLERATE   2600000
@ -15,6 +21,18 @@
 #define NUM_TRANSFERS       16
 #define TIMEOUT_MS          1000

+#define AMPLITUDE (1000) // Default amplitude for 12-bit I/Q
+
+void usage(void)
+{
+	fprintf(stderr, "Usage: bladeplayer [options]\n"
+		"  -f <tx_file>  I/Q sampling data file (required)\n"
+		"  -b <iq_bits>  I/Q data format [1/16] (default: 16)\n"
+		"  -g <tx_vga1>  TX VGA1 gain (default: %d)\n",
+		TX_VGA1);
+
+	return;
+}
 int main(int argc, char *argv[])
 {
 	int status;
@ -26,16 +44,71 @@ int main(int argc, char *argv[])
 	enum state {INIT, READ_FILE, PAD_TRAILING, DONE};
 	enum state state = INIT;

-	if (argc!=2) {
-		fprintf(stderr, "Usage: bladeplayer <tx_file>\n");
+	int compressed = 0;
+	uint8_t *read_buffer;
+	size_t samples_read;
+	int16_t lut[256][8];
+	int16_t amp = AMPLITUDE;
+	int i,k;
+
+	int gain = TX_VGA1;
+	int result;
+	int data_format;
+	char txfile[128];
+
+	// Empty TX file name
+	txfile[0] = 0;
+
+	if (argc<3) {
+		usage();
 		exit(1);
 	}

+	while ((result=getopt(argc,argv,"g:b:f:"))!=-1)
+	{
+		switch (result)
+		{
+		case 'g':
+			gain = atoi(optarg);
+			if (gain>-4 || gain<-35)
+			{
+				printf("ERROR: Invalid TX VGA1 gain.\n");
+				exit(1);
+			}
+			break;
+		case 'b':
+			data_format = atoi(optarg);
+			if (data_format!=1 && data_format!=16)
+			{
+				printf("ERROR: Invalid I/Q data format.\n");
+				exit(1);
+			}
+			else if (data_format==1)
+				compressed = 1;
+			break;
+		case 'f':
+			strcpy(txfile, optarg);
+			break;
+		case ':':
+		case '?':
+			usage();
+			exit(1);
+		default:
+			break;
+		}
+	}
+
 	// Open TX file.
-	fp = fopen(argv[1], "rb");
+	if (txfile[0]==0)
+	{
+		printf("ERROR: I/Q sampling data file is not specified.\n");
+		exit(1);
+	}
+
+	fp = fopen(txfile, "rb");

 	if (fp==NULL) {
-		fprintf(stderr, "Failed to open TX file: %s\n", argv[1]);
+		fprintf(stderr, "ERROR: Failed to open TX file: %s\n", argv[1]);
 		exit(1);
 	}

@ -75,13 +148,13 @@ int main(int argc, char *argv[])
 		printf("TX bandwidth: %u Hz\n", TX_BANDWIDTH);
 	}

-	status = bladerf_set_txvga1(dev, TX_VGA1);
+	status = bladerf_set_txvga1(dev, gain);
 	if (status != 0) {
 		fprintf(stderr, "Failed to set TX VGA1 gain: %s\n", bladerf_strerror(status));
 		goto out;
 	}
 	else {
-		printf("TX VGA1 gain: %d dB\n", TX_VGA1);
+		printf("TX VGA1 gain: %d dB\n", gain);
 	}

 	status = bladerf_set_txvga2(dev, TX_VGA2);
@ -104,6 +177,20 @@ int main(int argc, char *argv[])
 		goto out;
 	}

+	// if compressed
+	read_buffer = (uint8_t*)malloc(SAMPLES_PER_BUFFER / 4);
+
+	if (read_buffer == NULL) {
+		fprintf(stderr, "Failed to allocate read buffer.\n");
+		goto out;
+	}
+
+	for (i=0; i<256; i++)
+	{
+		for (k=0; k<8; k++)
+			lut[i][k] = ((i>>(7-k))&0x1)?amp:-amp;
+	}
+
 	// Configure the TX module for use with the synchronous interface.
 	status = bladerf_sync_config(dev,
 			BLADERF_MODULE_TX,
@ -131,6 +218,9 @@ int main(int argc, char *argv[])
 		int16_t *tx_buffer_current = tx_buffer;
 		unsigned int buffer_samples_remaining = SAMPLES_PER_BUFFER;

+		// if compressed
+		unsigned int read_samples_remaining = SAMPLES_PER_BUFFER / 4;
+
 		// Keep adding to the buffer until it is full or a failure occurs
 		while (buffer_samples_remaining > 0 && status == 0 && state != DONE) {
 			size_t samples_populated = 0;
@ -139,10 +229,34 @@ int main(int argc, char *argv[])
 				case INIT:
 				case READ_FILE:
 					// Read from the input file
+					if (compressed)
+					{
+						int16_t *write_buffer_current = tx_buffer;
+
+						samples_read = fread(read_buffer,
+								sizeof(uint8_t),
+								read_samples_remaining,
+								fp);
+
+						samples_populated = samples_read * 4;
+						buffer_samples_remaining = read_samples_remaining * 4;
+
+						// Expand compressed data into TX buffer
+						for (i=0; i<samples_read; i++)
+						{
+							memcpy(write_buffer_current, lut[read_buffer[i]], 8);
+						
+							// Advance the write buffer pointer
+							write_buffer_current += 8;
+						}
+					}
+					else
+					{
 						samples_populated = fread(tx_buffer_current,
 								2 * sizeof(int16_t),
 								buffer_samples_remaining,
 								fp);
+					}

 					// If the end of the file was reached, pad the rest of the buffer and finish.
 					if (feof(fp)) {
@ -187,6 +301,9 @@ int main(int argc, char *argv[])
 	// Free up our resources
 	free(tx_buffer);

+	// if compressed
+	free(read_buffer);
+
 	// Close TX file
 	fclose(fp);

--- a/satellite.csv
+++ b/satellite.csv