Information source-channel united coding method based on low-density odd-even check coding |
Title： |
| Information source-channel united coding method based on low-density odd-even check coding |
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Application Number： |
02155459 |
Application Date： |
2002/12/13 |
Announcement Date： |
2004/06/30 |
Pub. Date： |
2006/04/19 |
Publication Number： |
1508972 |
Announcement Number： |
1252935 |
Grant Date： |
2006-4-19 |
Granted Pub. Date： |
2006-4-19 |
ApplicationType： |
Invention |
State/Country： |
11[China|beijing] |
IPC： |
H03M 13/00, H03M 13/11, H04L 1/00, H04L 1/12 |
Applicant(s)： |
Tsinghua Univ. |
Inventor(s)： |
Yin Liuguo, Lu Jianhua, Wu Youshou |
Key Words： |
Information source-channel, united coding method, low-density, odd-even check coding |
Abstract： |
The method is a united method for encoding source channel by combining crypto Markov source estimation with low-density parity check (LDPC) coding. At sending end, source output sequence with redundancy is encoded through LDPC and modulated to output. At receiving end, decoding method of combining source estimation with channel decoding is utilized. That is to say first, hard decision of receiving sequence is calculated; then whether it is a legal code word is determined. If yes, the hard decision is output; if no, after crypto Markov source estimation is carried out for information sequence, hard decision is calculated again. If it is still not a legal code, then iteration of LDPC and decoding in specific number of time is carried out and repeated till maximum allowed number of time, and result is output. The method gives performance of information transmission with small delay, low complexity near to Shannon limitation, suitable to application of wireless multimedia communication. |
Claim： |
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Priority： |
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PCT： |
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LegalStatus： |
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