Implementation of POCSAG pager protocol and message encoder for SDR
pocsag - encodes message in POCSAG protocol for tranmission by Software Defined Dadio, generates binary file with preamble, sync codewords, encoded data and CRC (BCH code)
bin2audio - modulates binary data into a NRZ line code, generates an audio file at the specified BAUD rate. Can be used for other Software Defined Radio protocols, not just POCSAG
nb_fsk.grc - GNU Radio flow graph to modulate the line code as narrow-band FM and broadcast
./pocsag -a 4444 -m "Broadcast this on hackrf" -f - | ./bin2audio -i - -o example.wav
cat example.wav | sox -t raw -esigned-integer -b16 -r 48000 - -esigned-integer -b16 -r 22050 -t raw - | multimon-ng -t raw -a POCSAG1200 -This software contains code that transmits radio signals. POCSAG / pager messages are used by emergency services, Do not interfere with them. Do not broadcast on illegal frequencies.
For educational purpose only.