make-pchk ex-ham7a.pchk 3 7 0:0 0:3 0:4 0:5 1:1 1:3 1:4 1:6 2:2 2:4 2:5 2:6 make-gen ex-ham7a.pchk ex-ham7a.gen dense Number of 1s per check in Inv(A) X B is 3.0 transmit 7x100000 ex-ham7a.rec 1 awgn 0.5 Transmitted 700000 bits # DECODE BY ENUMERATION TO MINIMIZE BLOCK ERROR PROBABILITY decode ex-ham7a.pchk ex-ham7a.rec ex-ham7a.dec-blk awgn 0.5 \ enum-block ex-ham7a.gen Decoded 100000 blocks, 100000 valid. Average 16.0 iterations, 2% bit changes verify ex-ham7a.pchk ex-ham7a.dec-blk ex-ham7a.gen Block counts: tot 100000, with chk errs 0, with src errs 186, both 0 Bit error rate (on message bits only): 7.950e-04 # DECODE BY ENUMERATION TO MINIMIZE BIT ERROR PROBABILITY decode ex-ham7a.pchk ex-ham7a.rec ex-ham7a.dec-bit awgn 0.5 \ enum-bit ex-ham7a.gen Decoded 100000 blocks, 99988 valid. Average 16.0 iterations, 2% bit changes verify ex-ham7a.pchk ex-ham7a.dec-bit ex-ham7a.gen Block counts: tot 100000, with chk errs 12, with src errs 186, both 7 Bit error rate (on message bits only): 7.775e-04 # DECODE BY PROBABILITY PROPAGATION decode ex-ham7a.pchk ex-ham7a.rec ex-ham7a.dec-prp awgn 0.5 \ prprp 200 Decoded 100000 blocks, 99927 valid. Average 0.3 iterations, 2% bit changes verify ex-ham7a.pchk ex-ham7a.dec-prp ex-ham7a.gen Block counts: tot 100000, with chk errs 73, with src errs 276, both 52 Bit error rate (on message bits only): 1.290e-03