ex-ldpc36-5000a-out

关于LDPC编/译码的方针平台。能随机产生信源和模拟高斯信道。

make-ldpc ex-ldpc36-5000a.pchk 5000 10000 2 evenboth 3 no4cycle
Eliminated 25 cycles of length four by moving checks within column
make-gen  ex-ldpc36-5000a.pchk ex-ldpc36-5000a.gen dense
Number of 1s per check in Inv(A) X B is 2068.3
rand-src  ex-ldpc36-5000a.src 1 5000x100

# NOISE STANDARD DEVIATION 0.80, Eb/N0 = 1.94 dB

encode      ex-ldpc36-5000a.pchk ex-ldpc36-5000a.gen ex-ldpc36-5000a.src - \
 | transmit - - 1 awgn 0.80 \
 | decode   ex-ldpc36-5000a.pchk - - awgn 0.80 prprp 250 \
 | verify   ex-ldpc36-5000a.pchk - ex-ldpc36-5000a.gen ex-ldpc36-5000a.src
Encoded 100 blocks, source block size 5000, encoded block size 10000
Transmitted 1000000 bits
Decoded 100 blocks, 100 valid.  Average 11.1 iterations, 11% bit changes
Block counts: tot 100, with chk errs 0, with src errs 0, both 0
Bit error rate (on message bits only): 0.000e+00

# NOISE STANDARD DEVIATION 0.85, Eb/N0 = 1.41 dB

encode      ex-ldpc36-5000a.pchk ex-ldpc36-5000a.gen ex-ldpc36-5000a.src - \
 | transmit - - 1 awgn 0.85 \
 | decode   ex-ldpc36-5000a.pchk - - awgn 0.85 prprp 250 \
 | verify   ex-ldpc36-5000a.pchk - ex-ldpc36-5000a.gen ex-ldpc36-5000a.src
Encoded 100 blocks, source block size 5000, encoded block size 10000
Transmitted 1000000 bits
Decoded 100 blocks, 95 valid.  Average 33.7 iterations, 12% bit changes
Block counts: tot 100, with chk errs 5, with src errs 5, both 5
Bit error rate (on message bits only): 2.706e-03

# NOISE STANDARD DEVIATION 0.90, Eb/N0 = 0.92 dB

encode      ex-ldpc36-5000a.pchk ex-ldpc36-5000a.gen ex-ldpc36-5000a.src - \
 | transmit - - 1 awgn 0.90 \
 | decode   ex-ldpc36-5000a.pchk - - awgn 0.90 prprp 250 \
 | verify   ex-ldpc36-5000a.pchk - ex-ldpc36-5000a.gen ex-ldpc36-5000a.src
Encoded 100 blocks, source block size 5000, encoded block size 10000
Transmitted 1000000 bits
Decoded 100 blocks, 2 valid.  Average 246.2 iterations, 10% bit changes
Block counts: tot 100, with chk errs 98, with src errs 98, both 98
Bit error rate (on message bits only): 7.650e-02

# NOISE STANDARD DEVIATION 0.95, Eb/N0 = 0.45 dB

encode      ex-ldpc36-5000a.pchk ex-ldpc36-5000a.gen ex-ldpc36-5000a.src - \
 | transmit - - 1 awgn 0.95 \
 | decode   ex-ldpc36-5000a.pchk - - awgn 0.95 prprp 250 \
 | verify   ex-ldpc36-5000a.pchk - ex-ldpc36-5000a.gen ex-ldpc36-5000a.src
Encoded 100 blocks, source block size 5000, encoded block size 10000
Transmitted 1000000 bits
Decoded 100 blocks, 0 valid.  Average 250.0 iterations, 9% bit changes
Block counts: tot 100, with chk errs 100, with src errs 100, both 100
Bit error rate (on message bits only): 1.092e-01