发明名称 |
Joint multi-code detectors in CDMA communications system |
摘要 |
A CDMA communication system uses a RAKE receiver, a code correlator and a multi-code joint detector to jointly detect symbols in two or more received signals contained within a composite signal. The RAKE receiver separates the composite signal into two or more RAKE output signals by despreading the composite signal using selected spreading codes. The multi-code joint detector jointly detects the symbols in the received signals using the RAKE receiver output signals, cross-correlations between the spreading codes generated by the code correlator, and RAKE combining weights based on a noise covariance matrix. The multi-code joint detector also includes a trellis that represents possible states and state transitions and a branch metric calculator for calculating branch metrics associated with the state transitions based on the RAKE receiver output signals and the cross-correlations between the spreading codes.
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申请公布号 |
US2004202231(A1) |
申请公布日期 |
2004.10.14 |
申请号 |
US20030412504 |
申请日期 |
2003.04.11 |
申请人 |
WANG YI-PIN ERIC;CHENG JUNG-FU;GRANT STEPHEN;BOTTOMLEY GREGORY EDWARD |
发明人 |
WANG YI-PIN ERIC;CHENG JUNG-FU;GRANT STEPHEN;BOTTOMLEY GREGORY EDWARD |
分类号 |
H04B1/707;H04J13/00;H04L25/03;(IPC1-7):H04B1/707 |
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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