Frequency Domain Turbo Equalization for MIMO-CPSC Systems with Large Delay Spreads

Yogendra Umesh Itankar, A. Chockalingam
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引用次数: 2

Abstract

In this paper, we consider low-complexity turbo equalization for multiple-input multiple-output (MIMO) cyclic prefixed single carrier (CPSC) systems in MIMO inter-symbol interference (ISI) channels characterized by large delay spreads. A low-complexity graph based equalization is carried out in the frequency domain. Because of the reduction in correlation among the noise samples that happens for large frame sizes and delay spreads in frequency domain processing, improved performance compared to time domain processing is shown to be achieved. This improved performance is attractive for equalization in severely delay spread ISI channels like ultrawideband channels and underwater acoustic channels.
大延迟扩展MIMO-CPSC系统的频域Turbo均衡
本文研究了多输入多输出(MIMO)循环前缀单载波(CPSC)系统在具有大延迟扩展的MIMO码间干扰(ISI)信道中的低复杂度turbo均衡问题。在频域进行了一种基于低复杂度图的均衡化。由于在频域处理中发生的大帧大小和延迟扩展的噪声样本之间的相关性降低,与时域处理相比,性能得到了改善。这种改进的性能对于严重延迟扩展ISI信道(如超宽带信道和水声信道)的均衡具有吸引力。
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