发明名称 |
Equalisation of non-causal channels |
摘要 |
A system and method are provided for the equalization of non-causal channels in a communications system. The method comprises: receiving a non-return to zero (NRZ) data stream input; establishing thresholds to distinguish a first bit estimate; comparing the first bit estimate in the NRZ data stream to a second bit value received prior to the first bit, and a third bit received subsequent to the first bit; in response to the comparisons, determining the value of the first bit; tracking the NRZ data stream inputs in response to sequential bit value combinations; maintaining long-term averages of the tracked NRZ data stream inputs; adjusting the thresholds in response to the long-term averages; and, offsetting the threshold adjustments to account for the asymmetric noise distribution. Two methods are used to offset the threshold adjustments to account for the asymmetric noise distribution: forward error correction (FEC) decoding and tracking the ratio of bit values. <IMAGE>
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申请公布号 |
EP1318636(A2) |
申请公布日期 |
2003.06.11 |
申请号 |
EP20020026901 |
申请日期 |
2002.12.03 |
申请人 |
APPLIED MICROCIRCUITS CORPORATION |
发明人 |
YUAN, WARM SHAW;CASTAGNOZZI, DANIEL M.;SORGI, ALAN MICHAEL;CONROY, KEITH MICHAEL |
分类号 |
H04L1/00;H04B3/06;H04L25/03;H04L25/06;(IPC1-7):H04L25/03 |
主分类号 |
H04L1/00 |
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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