符号间干扰信道的迭代均衡合成算法

doi:10.3969/j.issn.1001-2400.2015.05.024

Abstract

Abstract:

To realize joint optimization of spatial diversity and equalization combining in the intersymbol interference (ISI) channel, an iterative equalization combining algorithm is proposed. The proposed algorithm uses the coefficients of Turbo equalization to calculate the combination weights without estimating the signal to noise ratio in each diversity branch. The equalized symbols from different diversity branches are combined, and the extrinsic information output from the decoder is fed back to the equalizers, so as to exchange soft information between the equalizers and the decoder. The performance of the proposed algorithm is analyzed using the extrinsic information transfer (EXIT) chart and verified by simulations. Results show that our approach fully exploits time domain information from the multipath channel and spatial domain information from multi receiving antennas, which efficiently improve the performance of the receiver in the severe ISI channel.

Key words: spatial diversity, Turbo equalization, intersymbol interference, extrinsic information transfer(EXIT) chart

CLC Number:

TN911.5

QIAO Liang;ZHENG Hui. Iterative equalization combining algorithm in intersymbol interference channel[J].J4, 2015, 42(5): 139-146.

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Iterative equalization combining algorithm in intersymbol interference channel

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