发明名称 |
DEMAPPER APPLIED TO QUADRATURE AMPLITUDE MODULATION TRELLIS CODED MODULATION DECODER AND RELATED METHOD |
摘要 |
A demapper, applied to a quadrature amplitude modulation trellis coded modulation (QAM-TCM) decoder, for generating more significant bits of a QAM signal according to the QAM signal and at least a less significant bit of the QAM signal is disclosed. The demapper includes a shifter for shifting the QAM signal to generate a shifted signal; a threshold value comparing and mapping unit for outputting at least a more-significant-bit buffered value; a sign bit decider for determining a sign value corresponding to the shifted signal; a multiplexer for generating a first more-significant-bit estimation and a second more-significant-bit estimation; and an operating unit for determining a third more-significant-bit estimation and a fourth more-significant-bit estimation.
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申请公布号 |
US2007110187(A1) |
申请公布日期 |
2007.05.17 |
申请号 |
US20060559885 |
申请日期 |
2006.11.14 |
申请人 |
LEE KAI-LI;CHIANG JUNG-TANG |
发明人 |
LEE KAI-LI;CHIANG JUNG-TANG |
分类号 |
H03D1/24 |
主分类号 |
H03D1/24 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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