发明名称 |
An FFT-based CDMA rake receiver system and method |
摘要 |
<p>The present invention provides a CDMA RAKE receiver that computes a data detection using Fast Fourier Transform (FFT) matched filters. Signals received are processed in frequency domain by the RAKE receiver. The RAKE receiver includes a pilot signal spreading code matched filter, a data signal spreading code matched filter and a channel matched filter. The pilot signal spreading code matched filter removes a spreading code of the pilot signal. The data signal spreading code matched filter removes a multiple access spreading code of the data signal. A channel matched filter estimates the channel frequency response and combine the received data signal from different paths before a decision is made. For increasing the CDMA system capacity, the RAKE receiver uses a interference cancellation method. A downlink receiver at a mobile station estimates the interference of a pilot signal and subtracts the pilot interference from the received signal before data detection. The uplink receivers at a base station use a multi-stage parallel interference cancellation process for removing multiple access interference from other users.</p> |
申请公布号 |
EP0980149(B1) |
申请公布日期 |
2004.10.20 |
申请号 |
EP19990114418 |
申请日期 |
1999.07.22 |
申请人 |
INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE |
发明人 |
HUANG, CHIA-CHI;WANG, SHIN-IUAN;HUANG, YUNG-LIANG |
分类号 |
H04B1/7093;H04B1/71;H04B1/7103;H04B1/7115;(IPC1-7):H04B1/707 |
主分类号 |
H04B1/7093 |
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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