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2002/5/14-15 [Computer/SW/Languages/Java] UID:24828 Activity:kinda low 75%like:24824 |
5/14 The (12,8) FEC hamming code has the following 4 correcting bits: (format is D8,D7,D6,D5,P4,D4,D3,D2,P3,D1,P2,P1) P1 = sum(D1,D2,D4,D5,D7) mod 2 P2 = sum(D1,D2,D6,D7) mod 2 P3 = sum(D2,D3,D4,D8) mod 2 P4 = sum(D5,D6,D7,D8) mod 2. How does one derive that? I have (15,11) and (7,4) perfect code examples but I don't get how the parity bits are calculated. Thx. \_ what class is this? |
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