DS-CDMA系统中MMSE波束形成分析

2001 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (IEEE Cat. No.01CH37233) Pub Date : 2001-08-26 DOI:10.1109/PACRIM.2001.953539

N.Y. Wang, P. Agathoklis, A. Antoniou

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引用次数: 5

摘要

研究了自适应天线阵列中获得最佳波束形成权值的两种常用准则，即基于芯片的均方误差准则和基于符号的均方误差准则的性能，并对其性能差异进行了定性解释。在第一个准则中，利用空间分异来确定波束形成权重。二是利用码分离和空间分集。结果表明，在确定波束形成权值时采用码分离可以减小由于抑制干扰而产生的噪声放大。分析和仿真结果表明，在存在多址干扰的情况下，基于符号的MMSE准则比基于芯片的MMSE准则具有更好的性能。

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Analysis of MMSE beamformer for DS-CDMA systems

The performance of two commonly used criteria to obtain the optimum beamforming weights in adaptive antenna arrays, namely, the chip-based mean-squared-error (MMSE) criterion and the symbol-based MMSE criterion, is investigated and a qualitative explanation for the difference in their performance is given. In the first criterion, spatial diversity is exploited in the determination of the beamforming weights. In the second, code separation and spatial diversity are utilized. It is shown that the utilization of code separation in the determination of beamforming weights leads to less noise magnification resulting from interference rejection. Analysis and simulation results show that the symbol-based MMSE criterion offers a better performance than the chip-based MMSE criterion in the presence of multiple access interference.

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来源期刊

2001 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (IEEE Cat. No.01CH37233)

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