Digital demodulated bit flow soft information acquiring method of multi-level adjusting mode |
Title： |
| Digital demodulated bit flow soft information acquiring method of multi-level adjusting mode |
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Application Number： |
200410004471 |
Application Date： |
2004/02/27 |
Announcement Date： |
2005/01/05 |
Pub. Date： |
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Publication Number： |
1561056 |
Announcement Number： |
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Grant Date： |
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Granted Pub. Date： |
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ApplicationType： |
Invention |
State/Country： |
11[China|beijing] |
IPC： |
H04L 27/34 |
Applicant(s)： |
Tsinghua Univ. |
Inventor(s)： |
Dong Peixin, Fan Pingyi, Yi Li |
Key Words： |
Digital demodulated, bit flow, soft information, acquiring method, multi-level adjusting mode |
Abstract： |
A bit stream soft information pick-up method for digitalized modulation with multilevel modulation characterizes in getting M prior probability of each symbol from the demodulation end first, then to determine a symbol image set corresponding to each bit, finally to get the soft information of each bit by maximum posterior probability algorithm. The method also puts forward an operation simplifying the operation of acquiring logarithm with index um based on natural logarithm maximum posterior probability algorithm to one of the acquiring sum of comparison and lookup table to get the bit stream soft information which picks-up method makes the parallel decode possible. |
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| Last Update |
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2008-4-17 |
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Selected patents owned by Tsinghua University filed in 2005 are loaded. |
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2008-3-31 |
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Selected patents owned by Tsinghua University filed in 2006 and 2007 are load. |
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