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README_cohpsk.md

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README_cohpsk.md

Introduction

Quickstart

  1. BER test in AWGN channel with just less that 2% average bit error rate:

     $ ./cohpsk_get_test_bits - 5600 | ./cohpsk_mod - - | ./cohpsk_ch - - -30 | ./cohpsk_demod - - | ./cohpsk_put_test_bits -
 <snip>
 SNR3k(dB):  3.41 C/No: 38.2 PAPR:  8.1 
 BER: 0.017 Nbits: 5264 Nerrors: 92



2. Plot some of the demod internal states, used to chase down freq offset problemL


$ cd build_linux/src
$ ./cohpsk_get_test_bits - 5600 | ./cohpsk_mod - -  | ./cohpsk_ch - - -40 -f -20 | ./cohpsk_demod -o cohpsk_demod.txt - - | ./cohpsk_put_test_bits -
$ cd ../../octave
$ octave --no-gui
$ cohpsk_demod_plot("../build_linux/src/cohpsk_demod.txt")    


3. Run Octave<-> tests

$ cd ~/codec2/build_linux/unittest $ ./tochpsk $ cd ~/codec2/octave $ octave --no-gui octave> tcohpsk


## References

## C Code

## Octave Scripts