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demo

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gym487 2017-04-23 02:23:03 +08:00
parent f2c74ffea8
commit 789e2e45d1
4 changed files with 16 additions and 9 deletions
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11
README.md
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@ -18,11 +18,12 @@ 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 ## Realtime by Gnuradio
Use -n option can connect to a TCP source in Gnuradio for realtime simulation. 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 (as default, it can be changed by.option -n). The tcp source should be set in "Server" mode, listening to port 1234 (as default, it can be changed by.option -n).
See tcp.grc as a example. See tcp.grc as a example.
### Generating the GPS signal file ### Generating the GPS signal file
@ -76,7 +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 -n <port> Use TCP connection to Gnuradio TCP-Source for realtime simulation. (Default 1234).
``` ```
The user motion can be specified in either dynamic or static mode: The user motion can be specified in either dynamic or static mode:
@ -93,6 +94,12 @@ The user motion can be specified in either dynamic or static mode:
> gps-sdr-sim -e brdc3540.14n -l 30.286502,120.032669,100 > gps-sdr-sim -e brdc3540.14n -l 30.286502,120.032669,100
``` ```
Use Gnuradio to realtime simulate 3000s:
```
> gps-sdr-sim -e brdc3540.14n -l 30.286502,120.032669,100 -n 1234 -d 3000
```
### Transmitting the samples ### Transmitting the samples
The TX port of a particular SDR platform is connected to the GPS receiver The TX port of a particular SDR platform is connected to the GPS receiver

4
gpssim.c
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@ -1661,7 +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 TCP-Source for\n realtime simulation and port(default 1234)\n", " -n <port> Use TCP connect to Gnuradio TCP-Source for\n realtime simulation. (default 1234)\n",
(USER_MOTION_SIZE)/10.0,STATIC_MAX_DURATION); (USER_MOTION_SIZE)/10.0,STATIC_MAX_DURATION);
return; return;
@ -1867,7 +1867,7 @@ int main(int argc, char *argv[])
llh[2] = 10.0; llh[2] = 10.0;
} }
if (duration<0.0 || (duration>((double)USER_MOTION_SIZE)/10.0 && !staticLocationMode) || (duration>STATIC_MAX_DURATION && staticLocationMode)) if (duration<0.0 || (duration>((double)USER_MOTION_SIZE)/10.0 && !staticLocationMode) || (duration>STATIC_MAX_DURATION && staticLocationMode)&&usesocket==false)
{ {
printf("ERROR: Invalid duration.\n"); printf("ERROR: Invalid duration.\n");
exit(1); exit(1);

6
tcp.grc
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@ -124,7 +124,7 @@
</param> </param>
<param> <param>
<key>_coordinate</key> <key>_coordinate</key>
<value>(272, 200)</value> <value>(280, 200)</value>
</param> </param>
<param> <param>
<key>_rotation</key> <key>_rotation</key>
@ -152,7 +152,7 @@
</param> </param>
<param> <param>
<key>port</key> <key>port</key>
<value>2345</value> <value>1234</value>
</param> </param>
<param> <param>
<key>vlen</key> <key>vlen</key>
@ -1071,7 +1071,7 @@
</param> </param>
<param> <param>
<key>args</key> <key>args</key>
<value>hackrf=81320f</value> <value>hackrf</value>
</param> </param>
<param> <param>
<key>_enabled</key> <key>_enabled</key>

4
top_block.py
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@ -2,7 +2,7 @@
################################################## ##################################################
# GNU Radio Python Flow Graph # GNU Radio Python Flow Graph
# Title: Top Block # Title: Top Block
# Generated: Sun Apr 23 01:40:34 2017 # Generated: Sun Apr 23 02:13:05 2017
################################################## ##################################################
if __name__ == '__main__': if __name__ == '__main__':
@ -60,7 +60,7 @@ class top_block(gr.top_block, Qt.QWidget):
################################################## ##################################################
# Blocks # Blocks
################################################## ##################################################
self.osmosdr_sink_0 = osmosdr.sink( args="numchan=" + str(1) + " " + "hackrf=81320f" ) self.osmosdr_sink_0 = osmosdr.sink( args="numchan=" + str(1) + " " + "hackrf" )
self.osmosdr_sink_0.set_sample_rate(samp_rate) self.osmosdr_sink_0.set_sample_rate(samp_rate)
self.osmosdr_sink_0.set_center_freq(100e6, 0) self.osmosdr_sink_0.set_center_freq(100e6, 0)
self.osmosdr_sink_0.set_freq_corr(0, 0) self.osmosdr_sink_0.set_freq_corr(0, 0)