发明名称 |
Maximum-likelihood sequence estimator with variable number of states |
摘要 |
A maximum-likelihood sequence estimator (MLSE) with a variable number of states. A channel response estimator calculates channel responses from a received signal having a predetermined burst length and a reference signal. A controller checks the latest (L-th) response having a larger power than a predetermined threshold value of the channel responses and determines the L number of effective channel responses having the larger power. A Viterbi equalizer with a variable number of states executes a maximum-likelihood sequence estimation on the basis of the trellis with M(L-1) states (M is a multi-value number of a modulation signal) using the L number of effective channel responses. The MLSE is operated with the minimum number of states every burst to reduce an average processing amount without degrading characteristics and to achieve a low consumption power of receivers.
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申请公布号 |
US5644603(A) |
申请公布日期 |
1997.07.01 |
申请号 |
US19950499402 |
申请日期 |
1995.07.07 |
申请人 |
NEC CORPORATION |
发明人 |
USHIROKAWA, AKIHISA |
分类号 |
H03H21/00;H03M13/23;H04B3/10;H04L25/02;H04L25/03;(IPC1-7):G06F11/10 |
主分类号 |
H03H21/00 |
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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