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22 lines
945 B
Plaintext
22 lines
945 B
Plaintext
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#!/bin/sh
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# Example of coding using a (7,4) Hamming code, with transmission through
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# a Binary Symmetric Channel with error probability of 0.05.
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#
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# This example shows how random source messages can be encoded as codewords,
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# transmitted through the simulated channel, decoded, and the message bits
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# extracted from the codewords. The final result is in ex-ham7b.ext, which can
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# be compared to ex-ham7b.src.
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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-pchk ex-ham7b.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
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make-gen ex-ham7b.pchk ex-ham7b.gen dense
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rand-src ex-ham7b.src 1 4x1000
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encode ex-ham7b.pchk ex-ham7b.gen ex-ham7b.src ex-ham7b.enc
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transmit ex-ham7b.enc ex-ham7b.rec 1 bsc 0.05
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decode ex-ham7b.pchk ex-ham7b.rec ex-ham7b.dec bsc 0.05 enum-bit ex-ham7b.gen
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verify ex-ham7b.pchk ex-ham7b.dec ex-ham7b.gen ex-ham7b.src
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extract ex-ham7b.gen ex-ham7b.dec ex-ham7b.ext
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