caiyu/gps-sdr-sim
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

descreption

Browse Source
This commit is contained in:
gym487 2017-04-23 01:22:57 +08:00
parent a476e0a8b5
commit 7cd1c942d8
2 changed files with 11 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
README.md
View File

@ -1,4 +1,4 @@
# GPS-SDR-SIM # GPS-SDR-SIM realtime
GPS-SDR-SIM generates GPS baseband signal data streams, which can be converted GPS-SDR-SIM generates GPS baseband signal data streams, which can be converted
to RF using software-defined radio (SDR) platforms, such as to RF using software-defined radio (SDR) platforms, such as
@ -18,6 +18,14 @@ to RF using software-defined radio (SDR) platforms, such as
$ gcc gpssim.c -lm -O3 -o gps-sdr-sim $ gcc gpssim.c -lm -O3 -o gps-sdr-sim
``` ```
## Realtime
Use -n option can connect to a TCP source in Gnuradio for realtime simulation.
The tcp source should be set in "Server" mode, listening to port 1234.
See tcp.grc as a example.
### Generating the GPS signal file ### Generating the GPS signal file
A user-defined trajectory can be specified in either a CSV file, which contains A user-defined trajectory can be specified in either a CSV file, which contains
@ -69,6 +77,7 @@ Options:
-b <iq_bits> I/Q data format [1/8/16] (default: 16) -b <iq_bits> I/Q data format [1/8/16] (default: 16)
-i Disable ionospheric delay for spacecraft scenario -i Disable ionospheric delay for spacecraft scenario
-v Show details about simulated channels -v Show details about simulated channels
-n Use tcp connect to gnuradio for realtime simulation
``` ```
The user motion can be specified in either dynamic or static mode: The user motion can be specified in either dynamic or static mode:

1
gpssim.c
View File

@ -1661,6 +1661,7 @@ void usage(void)
" -b <iq_bits> I/Q data format [1/8/16] (default: 16)\n" " -b <iq_bits> I/Q data format [1/8/16] (default: 16)\n"
" -i Disable ionospheric delay for spacecraft scenario\n" " -i Disable ionospheric delay for spacecraft scenario\n"
" -v Show details about simulated channels\n", " -v Show details about simulated channels\n",
" -n Use TCP connect to gnuradio for realtime simulation\n",
((double)USER_MOTION_SIZE) / 10.0, STATIC_MAX_DURATION); ((double)USER_MOTION_SIZE) / 10.0, STATIC_MAX_DURATION);
return; return;