Group successive interference cancelator based on minimum mean-square error detection

被引：0
|
作者：
Zhang D. [1 ,2 ]
Liao G. [1 ]
机构：
[1] National Key Laboratory for Radar Signal Processing, Xidian University
[2] Department of Applied Mathematics, Ankang University
来源：
Xinan Jiaotong Daxue Xuebao/Journal of Southwest Jiaotong University | 2010年 / 45卷 / 05期
关键词：
Bit error rate (BER); Diagonal loading; Grouping detection; MMSE (minimum mean-square error) detection; Successive interference cancellation;
D O I：
10.3969/j.issn.0258-2724.2010.05.014
中图分类号：
学科分类号：
摘要：
In order to reduce the demodulation delay of the conventional successive interference cancelator (SIC) and improve the BER (bit error rate) performance of each stage, an improved SIC was proposed based on the diagonal loading method and the interval grouping method. This improved SIC loads the correlation matrix of each stage diagonally. Through the selection of loading parameters, the output signal interference ratio of grouping users is maximized so that the minimum mean-square error (MMSE) detection can be realized and the update of the linear operator in each stage is only related to the diagonal loading parameters. Theoretic analysis and simulation results show that compared with the conventional SIC and the MMSE detector, the improved SIC reduces demodulation delays and achieves a better BER performance.
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页码：739 / 744
页数：5
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