基于PCS/cellular的CDMA盲自适应波束形成

Conference Record of The Twenty-Ninth Asilomar Conference on Signals, Systems and Computers Pub Date : 1995-10-30 DOI:10.1109/ACSSC.1995.540575

M. Zoltowski, Javier Ramos

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引用次数: 41

摘要

基于以下观察结果，开发了一种用于CDMA的盲自适应波束形成方案，该方案消除了强多用户接入干扰并优化了多径组合:将每个天线的输出通过与期望用户的PN序列相对应的匹配滤波器后，可以隔离同信道干扰占主导地位的时间段。这样就可以单独估计同信道干扰的空间-频率相关矩阵。在同信道干扰的空间频率相关矩阵的度量中，产生最佳信号与干扰加噪声比的权重向量是信号加干扰的空间频率相关矩阵的“最大”广义特征向量。仿真结果验证了该方法的有效性。

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Blind adaptive beamforming for CDMA based PCS/cellular

A blind adoptive beamforming scheme is developed for CDMA that cancels strong multi-user access interference and optimally combines multipath based on the following observation: after passing the output of each antenna through a matched filter corresponding to the PN sequence of the desired user, one can isolate periods of time when the cochannel interference dominates. This allows one to estimate the spatio-frequency correlation matrix of the co-channel interference alone. The weight vector yielding the optimum signal to interference plus noise ratio for bit decisions is the "largest" generalised eigenvector of the signal plus interference spatio-frequency correlation matrix in the metric of the spatio frequency correlation matrix of the co-channel interference alone. Simulations are presented demonstrating the efficacy of the procedure.

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Conference Record of The Twenty-Ninth Asilomar Conference on Signals, Systems and Computers

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