OSQZSS
commit
d7a65c2e69
@ -37,13 +37,14 @@ Doppler for the GPS satellites in view. This simulated range data is
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then used to generate the digitized I/Q samples for the GPS signal.
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The bladeRF command line interface requires I/Q pairs stored as signed
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16-bit integers, while the hackrf_transfere supports signed bytes.
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16-bit integers, while the hackrf_transfer supports signed bytes.
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```
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Usage: gps-sdr-sim [options]
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Options:
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-e <gps_nav> RINEX navigation file for GPS ephemerides (required)
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-u <user_motion> User motion file (required)
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-u <user_motion> User motion file
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-l <location> Latitude,Longitude,Height (static mode) eg: 30.286502,120.032669,100
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-o <output> I/Q sampling data file (default: gpssim.bin)
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-s <frequency> Sampling frequency [Hz] (default: 2600000)
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-b <iq_bits> I/Q data format [8/16] (default: 8)
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@ -55,6 +56,10 @@ For example:
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> gps-sdr-sim -e brdc3540.14n -u circle.csv -b 16
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```
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```
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> gps-sdr-sim -e brdc3540.14n -l 30.286502,120.032669,100 -b 16
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```
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### Transmitting the samples
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The TX port of a particular SDR platform is connected to the GPS receiver
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81
gpssim.c
81
gpssim.c
@ -12,6 +12,12 @@
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#include <unistd.h>
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#endif
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#ifndef bool
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typedef int bool;
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#define true 1
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#define false 0
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#endif
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#define MAX_CHAR (100)
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#define MAX_SAT (32)
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@ -299,7 +305,7 @@ void xyz2llh(double *xyz, double *llh)
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return;
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}
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/*
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void llh2xyz(double *llh, double *xyz)
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{
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double n;
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@ -333,7 +339,7 @@ void llh2xyz(double *llh, double *xyz)
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return;
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}
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*/
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void ltcmat(double *llh, double t[3][3])
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{
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double slat, clat;
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@ -1070,7 +1076,8 @@ void usage(void)
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printf("Usage: gps-sdr-sim [options]\n"
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"Options:\n"
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" -e <gps_nav> RINEX navigation file for GPS ephemerides (required)\n"
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" -u <user_motion> User motion file (required)\n"
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" -u <user_motion> User motion file \n"
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" -l <location> Latitude,Longitude,Height (static mode) eg: 30.286502,120.032669,100\n"
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" -o <output> I/Q sampling data file (default: gpssim.bin)\n"
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" -s <frequency> Sampling frequency [Hz] (default: 2600000)\n"
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" -b <iq_bits> I/Q data format [8/16] (default: 8)\n");
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@ -1125,6 +1132,7 @@ int main(int argc, char *argv[])
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int iumd;
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int numd;
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char umfile[MAX_CHAR];
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bool staticLocationMode = false;
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double xyz[USER_MOTION_SIZE][3];
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char navfile[MAX_CHAR];
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@ -1153,7 +1161,7 @@ int main(int argc, char *argv[])
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exit(1);
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}
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while ((result=getopt(argc,argv,"e:u:o:s:b:"))!=-1)
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while ((result=getopt(argc,argv,"e:u:l:o:s:b:"))!=-1)
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{
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switch (result)
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{
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@ -1163,6 +1171,14 @@ int main(int argc, char *argv[])
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case 'u':
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strcpy(umfile, optarg);
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break;
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case 'l':
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// static llh coordinate input mode.
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// add by scateu@gmail.com
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staticLocationMode = true;
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sscanf(optarg,"%lf,%lf,%lf",&llh[0],&llh[1],&llh[2]);
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llh[0] = llh[0] / R2D; // convert to RAD
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llh[1] = llh[1] / R2D; // convert to RAD
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break;
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case 'o':
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strcpy(outfile, optarg);
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break;
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@ -1197,9 +1213,10 @@ int main(int argc, char *argv[])
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exit(1);
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}
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if (umfile[0]==0)
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if (umfile[0]==0 && !staticLocationMode)
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{
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printf("User motion file is not specified.\n");
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printf("Or you may use -l to specify llh coordinate directly.\n");
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exit(1);
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}
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@ -1214,27 +1231,45 @@ int main(int argc, char *argv[])
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// Receiver position
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////////////////////////////////////////////////////////////
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// Read user motion file
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numd = readUserMotion(xyz, umfile);
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if (numd==-1)
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if (!staticLocationMode)
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{
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printf("Failed to open user motion file.\n");
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exit(1);
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// Read user motion file
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numd = readUserMotion(xyz, umfile);
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if (numd==-1)
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{
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printf("Failed to open user motion file.\n");
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exit(1);
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}
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else if (numd==0)
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{
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printf("Failed to read user motion data.\n");
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exit(1);
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}
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printf("User motion data = %d\n", numd);
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// Initial location in Geodetic coordinate system
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xyz2llh(xyz[0], llh);
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printf("xyz = %11.1f, %11.1f, %11.1f\n", xyz[0][0], xyz[0][1], xyz[0][2]);
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printf("llh = %11.6f, %11.6f, %11.1f\n", llh[0]*R2D, llh[1]*R2D, llh[2]);
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} else {
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// static llh coordinate input mode. "-l"
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// add by scateu@gmail.com
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printf("Using static location mode.\n");
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llh2xyz(llh,xyz[0]); // convert llh to xyz
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printf("xyz = %11.1f, %11.1f, %11.1f\n", xyz[0][0], xyz[0][1], xyz[0][2]);
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printf("llh = %11.6f, %11.6f, %11.1f\n", llh[0]*R2D, llh[1]*R2D, llh[2]);
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numd = USER_MOTION_SIZE;
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for (int i=1;i<numd;i++) {
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xyz[i][0] = xyz[0][0];
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xyz[i][1] = xyz[0][1];
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xyz[i][2] = xyz[0][2];
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}
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}
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else if (numd==0)
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{
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printf("Failed to read user motion data.\n");
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exit(1);
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}
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printf("User motion data = %d\n", numd);
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// Initial location in Geodetic coordinate system
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xyz2llh(xyz[0], llh);
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printf("xyz = %11.1f, %11.1f, %11.1f\n", xyz[0][0], xyz[0][1], xyz[0][2]);
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printf("llh = %11.6f, %11.6f, %11.1f\n", llh[0]*R2D, llh[1]*R2D, llh[2]);
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////////////////////////////////////////////////////////////
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// Read ephemeris
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