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    • 9. 发明授权
    • Joint multi-code detectors in CDMA communications system
    • CDMA通信系统中的联合多码探测器
    • US07787522B2
    • 2010-08-31
    • US10412504
    • 2003-04-11
    • Yi-Pin Eric WangJung-Fu ChengStephen GrantGregory Edward Bottomley
    • Yi-Pin Eric WangJung-Fu ChengStephen GrantGregory Edward Bottomley
    • H04B1/00
    • H04B1/7105H04B1/709H04B1/712H04L25/03171H04L25/03331
    • 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.
    • CDMA通信系统使用RAKE接收机,码相关器和多码联合检测器联合检测复合信号中包含的两个或多个接收信号中的符号。 RAKE接收机通过使用选择的扩展码解扩复合信号,将复合信号分离成两个或更多个RAKE输出信号。 多码联合检测器使用RAKE接收机输出信号,由码相关器产生的扩展码之间的互相关和基于噪声协方差矩阵的RAKE组合权重联合检测接收信号中的符号。 多码联合检测器还包括表示可能的状态和状态转换的网格,以及用于基于RAKE接收机输出信号和扩展码之间的互相关来计算与状态转换相关联的分支度量的分支度量计算器。