用于CDMA下行链路的信道缩短芯片级MMSE均衡

Yi Zhang, J. Gu, Dacheng Yang
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引用次数: 0

摘要

先前的研究表明,MMSE(最小均方误差)均衡器在高数据速率系统中具有比RAKE接收器和ZF(零强迫)均衡器更好的性能。但是,MMSE均衡器的复杂度比RAKE接收机高得多,特别是在高片率情况下衰落信道稀疏且信道长度变长时,妨碍了MMSE均衡器的应用。本文的目的是为了有效地减少信道长度,从而降低MMSE均衡器的计算复杂度。提出了一种最优缩短MMSE均衡器信道脉冲响应的新算法。该算法利用特征值和特征向量生成缩短脉冲响应滤波器(SIRF)的全局最优系数,具有较低的复杂度。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Channel shortened chip-level MMSE equalization for CDMA downlink
Previous work has shown that MMSE (minimum mean square error) equalizer has better performance than RAKE receiver and ZF (zero forcing) equalizer in high data rate systems. However, MMSE equalizer has a much higher complexity than RAKE receiver, especially when fading channel is sparse in high chip rate cases and the length of the channel becomes very long, which prohibits its applications. Our purpose of the paper is to reduce the length of the channel efficiently and thus to reduce the computation complexity of MMSE equalizer. A new algorithm for the optimal shortening of channel impulse response for MMSE equalizers is proposed. This algorithm, which uses eigenvalues and eigenvectors to generate the globally optimal coefficients of shortening impulse response filter (SIRF), has a lower complexity than the previous ones.
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