Performance Analysis of Linear and Non-Linear Equalizer in Rician Channel
Performance Analysis of Linear and Non-Linear Equalizer in Rician Channel
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莱斯通道线性和非线性均衡器的性能分析
DOI：
10.1016/j.protcy.2012.05.111
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
R. Bera
中科院分区：
文献类型：
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作者：
Amit Agarwal;S. Sur;A. Singh;Hemanth Gurung;Abhishek K. Gupta;R. Bera
本文介绍了四相相移键控（QPSK）和八相相移键控（8 PSK）传输中采用软判决反馈的均衡算法。所采用的方法是最小均方误差（MMSE），其中每次迭代都是为了细化数据估计。用于生成软判决的规则不断地适应算法的当前状态。我们表明，标准的判决反馈均衡（DFE-非线性均衡器）方法明显优于最小均方误差（MMSE线性均衡器）。通过MATLAB仿真表明，在散射环境下，随着信噪比的增加，MMSE-DFE的性能得到了提高。
In this paper, equalization algorithms applying soft–decision feedback, designed for quaternary phase–shift keying (QPSK) and 8PSK (phase–shift keying) transmission are introduced. The method employed is a minimum mean– squared error (MMSE) in which each iteration is done in order to refine the data estimates. The rule for generating soft decisions is adapted continuously to the current state of the algorithm. We show that standard Decision Feedback Equalization (DFE-Non linear Equaliser) methods are clearly outperformed the minimum mean–squared error (MMSE linear Equaliser). We use the MATLAB to show that the MMSE-DFE provide better performance with the increasing value of SNR in scattering environment.