发明名称 |
Code-division-multiple-access (DS-CDMA) channels with aperiodic codes |
摘要 |
A method for channel estimation, includes receiving an input signal due to a superposition of waveforms encoding symbols transmitted respectively by a plurality of transmitters in a common frequency band. Each transmitter among the plurality of transmitters modulates the symbols with a respective spreading code. The input signal is sampled at sampling intervals over the duration of an observation period, thus providing a sequence of samples. The sequence of complex samples is processed to estimate a channel response for each of the transmitters by maximizing, individually for each of the transmitters and based on the respective spreading code of the transmitter, a likelihood of correctly decoding the transmitted symbols using the estimated channel response.
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申请公布号 |
US2004100928(A1) |
申请公布日期 |
2004.05.27 |
申请号 |
US20020306916 |
申请日期 |
2002.11.27 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
BEN-DAVID SHAY;KARNIN EHUD;SHEINVALD JACOB |
分类号 |
H04B1/69;H04B1/707;H04L25/02;(IPC1-7):H04B7/216 |
主分类号 |
H04B1/69 |
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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