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51 lines
2.0 KiB
Plaintext
51 lines
2.0 KiB
Plaintext
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#!/bin/sh
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# Example of a (2000,1000) LDPC code with 3 checks per bit and 6 bits per
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# check, tested on Additive White Gaussian Noise channels with noise standard
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# deviations varying from 0.80 to 0.95.
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#
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# Testing is done by transmitting random messages, which is safer (though
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# slower) than using only zero messages. Decoding is done using a maximum
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# of 250 iterations of probability propagation.
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set -e # Stop if an error occurs
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set -v # Echo commands as they are read
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make-ldpc ex-ldpc36-1000a.pchk 1000 2000 1 evenboth 3 no4cycle
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make-gen ex-ldpc36-1000a.pchk ex-ldpc36-1000a.gen dense
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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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# 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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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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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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# 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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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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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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# 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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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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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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# 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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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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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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