发明名称 |
CHANNEL ESTIMATION DEVICE, AND CDMA RECEIVER AND CDMA TRANSMITTER/RECEIVER HAVING THE DEVICE |
摘要 |
There are provided a channel estimation unit for achieving highly accurate channel estimation, a CDMA receiver and a CDMA transceiver with the channel estimation unit. Channel estimates of data symbols are obtained from pilot symbols in a combined symbol sequence which has a plurality of slots and includes the data symbols and the pilot symbols. First, the pilot symbols in the combined symbol sequence are located. Second, pilot blocks are generated by extracting the pilot symbols from two or more slots in the combined symbol sequence. Third, channel estimates of the data symbols are obtained by calculating a weighted sum of averages of the pilot symbols in the individual pilot blocks. The weighted sum is carried out using appropriate weighting factors for individual data symbols in each slot. This enables highly accurate channel estimation. <IMAGE> |
申请公布号 |
EP0963071(A4) |
申请公布日期 |
2004.07.21 |
申请号 |
EP19980961402 |
申请日期 |
1998.12.17 |
申请人 |
NTT DOCOMO, INC. |
发明人 |
ABETA, SADAYUKI;SAWAHASHI, MAMORU;ADACHI, FUMIYUKI |
分类号 |
H04B1/707;H04B7/005;H04B7/26;H04J13/00;H04L25/02;H04W88/00 |
主分类号 |
H04B1/707 |
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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