55 lines
2.6 KiB
Plaintext
55 lines
2.6 KiB
Plaintext
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make-ldpc ex-ldpcvar-5000a.pchk 5000 10000 2 evenboth 2x2/7x3/1x7 no4cycle
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Eliminated 46 cycles of length four by moving checks within column
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make-gen ex-ldpcvar-5000a.pchk ex-ldpcvar-5000a.gen dense
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Number of 1s per check in Inv(A) X B is 1437.1
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rand-src ex-ldpcvar-5000a.src 1 5000x100
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# NOISE STANDARD DEVIATION 0.80, Eb/N0 = 1.94 dB
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encode ex-ldpcvar-5000a.pchk ex-ldpcvar-5000a.gen ex-ldpcvar-5000a.src - \
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| transmit - - 1 awgn 0.80 \
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| decode ex-ldpcvar-5000a.pchk - - awgn 0.80 prprp 250 \
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| verify ex-ldpcvar-5000a.pchk - ex-ldpcvar-5000a.gen ex-ldpcvar-5000a.src
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Encoded 100 blocks, source block size 5000, encoded block size 10000
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Transmitted 1000000 bits
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Decoded 100 blocks, 100 valid. Average 11.3 iterations, 11% bit changes
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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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encode ex-ldpcvar-5000a.pchk ex-ldpcvar-5000a.gen ex-ldpcvar-5000a.src - \
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| transmit - - 1 awgn 0.85 \
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| decode ex-ldpcvar-5000a.pchk - - awgn 0.85 prprp 250 \
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| verify ex-ldpcvar-5000a.pchk - ex-ldpcvar-5000a.gen ex-ldpcvar-5000a.src
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Encoded 100 blocks, source block size 5000, encoded block size 10000
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Transmitted 1000000 bits
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Decoded 100 blocks, 100 valid. Average 18.0 iterations, 12% bit changes
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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 0.90, Eb/N0 = 0.92 dB
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encode ex-ldpcvar-5000a.pchk ex-ldpcvar-5000a.gen ex-ldpcvar-5000a.src - \
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| transmit - - 1 awgn 0.90 \
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| decode ex-ldpcvar-5000a.pchk - - awgn 0.90 prprp 250 \
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| verify ex-ldpcvar-5000a.pchk - ex-ldpcvar-5000a.gen ex-ldpcvar-5000a.src
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Encoded 100 blocks, source block size 5000, encoded block size 10000
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Transmitted 1000000 bits
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Decoded 100 blocks, 65 valid. Average 119.8 iterations, 12% bit changes
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Block counts: tot 100, with chk errs 35, with src errs 35, both 35
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Bit error rate (on message bits only): 2.438e-02
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# NOISE STANDARD DEVIATION 0.95, Eb/N0 = 0.45 dB
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encode ex-ldpcvar-5000a.pchk ex-ldpcvar-5000a.gen ex-ldpcvar-5000a.src - \
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| transmit - - 1 awgn 0.95 \
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| decode ex-ldpcvar-5000a.pchk - - awgn 0.95 prprp 250 \
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| verify ex-ldpcvar-5000a.pchk - ex-ldpcvar-5000a.gen ex-ldpcvar-5000a.src
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Encoded 100 blocks, source block size 5000, encoded block size 10000
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Transmitted 1000000 bits
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Decoded 100 blocks, 0 valid. Average 250.0 iterations, 9% bit changes
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Block counts: tot 100, with chk errs 100, with src errs 100, both 100
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Bit error rate (on message bits only): 1.017e-01
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