e6bbb6cdc5
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| .. | ||
| 2024-06-07-132848_2704x1050_scrot.png | ||
| README.md | ||
| audiocoder.grc | ||
| m17_loopback.grc | ||
| m17_loopback.png | ||
| m17_loopback_noisy.grc | ||
| m17_loopback_noisy.png | ||
| m17_loopback_noisychannel.grc | ||
| m17_loopback_noisychannel.png | ||
| m17_rx.grc | ||
| m17_rx.png | ||
| m17_tx.grc | ||
| m17_tx.png | ||
| receiverRTLSDR.grc | ||
| receiverRTLSDR.png | ||
| transmitterPLUTOSDR.grc | ||
| transmitterPLUTOSDR.png | ||
README.md
gr-m17 examples
For a first test, jump to m17_loopback.grc which does not use external tools but is GNU Radio only.
The two m17_rx.grc and m17_tx.grc are for debugging and validation purposes of the conversion
from libm17 to GNU Radio block.
m17_rx.grc
This receiver testing example relies on ../M17_Implementations/SP5WWP/m17-coder/m17-coder-sym
to broadcast a signal. Following this unit testing example, run this flowchart along with
mkfifo /tmp/fifo1
mkfifo /tmp/fifo2
python3 ../M17_Implementations/SP5WWP/grc/m17_streamer.py
../M17_Implementations/SP5WWP/m17-coder/m17-coder-sym < /tmp/fifo1 > /tmp/fifo2 &
and the output of python3 ./m17_rx.py should be
...
DST: ALL SRC: AB1CDE TYPE: 0005 META: 0000000000000000000000000000 LSF_CRC_OK
DST: ALL SRC: AB1CDE TYPE: 0005 META: 0000000000000000000000000000 LSF_CRC_OK
DST: ALL SRC: AB1CDE TYPE: 0005 META: 0000000000000000000000000000 LSF_CRC_OK
DST: ALL SRC: AB1CDE TYPE: 0005 META: 0000000000000000000000000000 LSF_CRC_OK
DST: ALL SRC: AB1CDE TYPE: 0005 META: 0000000000000000000000000000 LSF_CRC_OK
...
It would be wise to execute from a terminal rather than the GNU Radio Companion graphical interface to avoid flooding the console.
m17_tx.grc
This transmitter testing example relies on ../M17_Implementations/SP5WWP/m17-decoder/m17-decoder-sym
to decode a signal. Following this unit testing example, run this flowchart along with
mkfifo /tmp/fifo1
mkfifo /tmp/fifo2
../M17_Implementations/SP5WWP/m17-decoder/m17-decoder-sym < /tmp/fifo2
and the output of python3 ./m17_tx.py should be
DST: AB2CDE SRC: AB1CDE TYPE: 0005 META: 48656C6C6F210000000000000000 LSF_CRC_OK
FN: 0018 PLD: 01020304050600000000000000000000 e=0.0
FN: 0019 PLD: 01020304050600000000000000000000 e=0.0
FN: 001A PLD: 01020304050600000000000000000000 e=0.0
FN: 001B PLD: 01020304050600000000000000000000 e=0.0
FN: 001C PLD: 01020304050600000000000000000000 e=0.0
FN: 001D PLD: 01020304050600000000000000000000 e=0.0
DST: AB2CDE SRC: AB1CDE TYPE: 0005 META: 48656C6C6F210000000000000000 LSF_CRC_OK
FN: 001E PLD: 01020304050600000000000000000000 e=0.0
m17_loopback.grc
Loopback demo with TX and RX both in GNU Radio.
The output should be
DST: AB2CDE SRC: AB1CDE TYPE: 0005 META: 48656C6C6F210000000000000000 LSF_CRC_OK
DST: AB2CDE SRC: AB1CDE TYPE: 0005 META: 48656C6C6F210000000000000000 LSF_CRC_OK
DST: AB2CDE SRC: AB1CDE TYPE: 0005 META: 48656C6C6F210000000000000000 LSF_CRC_OK
DST: AB2CDE SRC: AB1CDE TYPE: 0005 META: 48656C6C6F210000000000000000 LSF_CRC_OK
DST: AB2CDE SRC: AB1CDE TYPE: 0005 META: 48656C6C6F210000000000000000 LSF_CRC_OK
DST: AB2CDE SRC: AB1CDE TYPE: 0005 META: 48656C6C6F210000000000000000 LSF_CRC_OK
m17_loopback_noisy.grc
Loopback demo with the addition of noise, no modulation/no channnel.
m17_loopback_noisychannel.grc
Loopback demo with a noisy channel, including full modulation & demodulation.
transmitterPLUTOSDR.grc
M17 transmitter with ADALM Pluto SDR or Ettus Research B210.
receiverRTLSDR.grc
M17 receiver with RTL-SDR. Automatic Frequency Correction can be enabled as an option.
Complete demonstration
Resulting demonstration of wireless communication between a B210 emitting the signal and RTL-SDR dongle as receiver.
