用于CDMA下行链路的盲多用户接收机

S. Mudulodu, A. Paulraj
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引用次数: 12

摘要

提出了一种用于CDMA下行链路的盲空线性多用户接收机。下行链路的多址干扰(MAI)中的结构使得接收器可以在不首先获得所有用户的匹配滤波器输出(其包含用于最佳检测所传输符号的足够统计量)的情况下抑制它;适当选择轻拍的2D-RAKE接收器可以很好地抑制MAI。假设知道所有用户的编码,并利用发射信号中的子空间结构估计2D-RAKE接收机的抽头。我们的方法不需要训练符号或信道估计来估计接收机的抽头。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A blind multiuser receiver for the CDMA downlink
We propose a new blind space-time linear multiuser receiver for the CDMA downlink. The structure in the multiple access interference (MAI) for the downlink makes it possible for a receiver to suppress it without first obtaining the matched filter outputs for all the users (which comprise the sufficient statistics for optimum detection of the transmitted symbols); a 2D-RAKE receiver with appropriately chosen taps can suppress MAI reasonably well. Knowledge of all the users' codes is assumed and the taps of the 2D-RAKE receiver are estimated by making use of the subspace structure in the transmitted signal. Our approach does not require training symbols or channel estimation in order to estimate the receiver taps.
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