58 lines
2.5 KiB
Plaintext
58 lines
2.5 KiB
Plaintext
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make-ldpc ex-ldpc36-1000a.pchk 1000 2000 1 evenboth 3 no4cycle
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Eliminated 24 cycles of length four by moving checks within column
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make-gen ex-ldpc36-1000a.pchk ex-ldpc36-1000a.gen dense
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Number of 1s per check in Inv(A) X B is 400.3
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rand-src ex-ldpc36-1000a.src 1 1000x100
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encode ex-ldpc36-1000a.pchk ex-ldpc36-1000a.gen ex-ldpc36-1000a.src \
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ex-ldpc36-1000a.enc
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Encoded 100 blocks, source block size 1000, encoded block size 2000
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# NOISE STANDARD DEVIATION 0.80, Eb/N0 = 1.94 dB
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transmit ex-ldpc36-1000a.enc ex-ldpc36-1000a.rec 1 awgn 0.80
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Transmitted 200000 bits
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decode ex-ldpc36-1000a.pchk ex-ldpc36-1000a.rec ex-ldpc36-1000a.dec awgn 0.80\
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prprp 250
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Decoded 100 blocks, 100 valid. Average 10.8 iterations, 11% bit changes
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verify ex-ldpc36-1000a.pchk ex-ldpc36-1000a.dec ex-ldpc36-1000a.gen \
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ex-ldpc36-1000a.src
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Block counts: tot 100, with chk errs 0, with src errs 0, both 0
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Bit error rate (on message bits only): 0.000e+00
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# NOISE STANDARD DEVIATION 0.85, Eb/N0 = 1.41 dB
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transmit ex-ldpc36-1000a.enc ex-ldpc36-1000a.rec 1 awgn 0.85
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Transmitted 200000 bits
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decode ex-ldpc36-1000a.pchk ex-ldpc36-1000a.rec ex-ldpc36-1000a.dec awgn 0.85\
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prprp 250
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Decoded 100 blocks, 88 valid. Average 52.2 iterations, 12% bit changes
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verify ex-ldpc36-1000a.pchk ex-ldpc36-1000a.dec ex-ldpc36-1000a.gen \
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ex-ldpc36-1000a.src
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Block counts: tot 100, with chk errs 12, with src errs 12, both 12
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Bit error rate (on message bits only): 7.490e-03
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# NOISE STANDARD DEVIATION 0.90, Eb/N0 = 0.92 dB
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transmit ex-ldpc36-1000a.enc ex-ldpc36-1000a.rec 1 awgn 0.90
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Transmitted 200000 bits
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decode ex-ldpc36-1000a.pchk ex-ldpc36-1000a.rec ex-ldpc36-1000a.dec awgn 0.90\
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prprp 250
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Decoded 100 blocks, 19 valid. Average 209.4 iterations, 11% bit changes
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verify ex-ldpc36-1000a.pchk ex-ldpc36-1000a.dec ex-ldpc36-1000a.gen \
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ex-ldpc36-1000a.src
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Block counts: tot 100, with chk errs 81, with src errs 81, both 81
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Bit error rate (on message bits only): 6.529e-02
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# NOISE STANDARD DEVIATION 0.95, Eb/N0 = 0.45 dB
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transmit ex-ldpc36-1000a.enc ex-ldpc36-1000a.rec 1 awgn 0.95
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Transmitted 200000 bits
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decode ex-ldpc36-1000a.pchk ex-ldpc36-1000a.rec ex-ldpc36-1000a.dec awgn 0.95\
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prprp 250
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Decoded 100 blocks, 1 valid. Average 248.0 iterations, 9% bit changes
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verify ex-ldpc36-1000a.pchk ex-ldpc36-1000a.dec ex-ldpc36-1000a.gen \
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ex-ldpc36-1000a.src
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Block counts: tot 100, with chk errs 99, with src errs 99, both 99
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Bit error rate (on message bits only): 1.055e-01
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