发明名称 |
Channel estimation device and method, demodulation device and method, and fading frequency decision device and method |
摘要 |
A channel estimation value of data symbols of a data channel is calculated by weighting and averaging pilot symbols in a parallel time multiplexing method. Also, a channel estimation value of data symbols during each data symbol interval is calculated by dividing data symbols in a slot into a plurality of data symbol intervals, selecting pilot symbols suitable for calculation of a channel estimation value of data symbols during each data symbol interval and weighting and averaging that pilot symbols. Also, a fading frequency is detected based on an inner product value of pilot symbols. Weighting factors are changed based on the detected fading frequency. Also, a channel estimation value is calculated by weighting and averaging pilot signals using a plurality of weighting sequences. The calculated channel estimation value is used to demodulate received data.
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申请公布号 |
US7929592(B1) |
申请公布日期 |
2011.04.19 |
申请号 |
US20000701705 |
申请日期 |
2000.03.31 |
申请人 |
NTT DOCOMO, INC. |
发明人 |
OKUMURA YUKIHIKO;ANDO HIDEHIRO;USUDA MASAFUMI;ISHIKAWA YOSHIHIRO;ONOE SEIZO |
分类号 |
H04B1/69;H04B1/707;H04B1/712;H04B7/08;H04B7/26;H04L25/02;H04L27/01;H04Q7/36;H04W28/18 |
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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