| 简化MIMO-OFDM模型的EM-Turbo信号检测算法 |
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| 引用本文： | 张用宇,任雪峰,蒋宇中.简化MIMO-OFDM模型的EM-Turbo信号检测算法[J].舰船电子工程,2010,30(11):88-91. |
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| 作者姓名： | 张用宇 任雪峰 蒋宇中 |
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| 作者单位： | [1]海军司令部通信部,北京100036 [2]海军工程大学电子工程学院,武汉430033 |
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| 摘 要： | 根据Turbo编码的交织长度对通信系统性能的影响,提出了简化的Turbo编码MIMO-OFDM系统模型。研究了最大期望（EM）算法在这种简化模型中的性能,并提出了一种EM算法与Turbo软译码相结合（EM-Turbo）的反馈迭代信号检测算法。比较了不同交织长度以及不同的信号检测算法情况下的系统性能。仿真结果表明在简化系统模型中,反馈迭代信号检测算法可以大大改善系统的性能。
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| 关 键 词： | MIMO-OFDM EM算法 Turbo软译码 反馈迭代 |
EM-Turbo Feedback Iterative Signal Detective Algorithm in Simple Model of MIMO-OFDM System |
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| Zhang Yongyu,Ren Xuefeng,Jiang Yuzhong.EM-Turbo Feedback Iterative Signal Detective Algorithm in Simple Model of MIMO-OFDM System[J].Ship Electronic Engineering,2010,30(11):88-91. |
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| Authors: | Zhang Yongyu Ren Xuefeng Jiang Yuzhong |
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| Institution: | Zhang Yongyu) Ren Xuefeng) Jiang Yuzhong)(The Communication Department of Naval Command1),Beijing 100036)(College of Electronic Engineering,Naval Univ.of Engineering2),Wuhan 430033) |
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| Abstract: | A simple model of Turbo coding MIMO-OFDM system based on the effect of Turbo coding interleaver＇s length for communication systems is proposed.The performance of the expectation-maximization（EM） algorithm is researched,and a feedback iterative signal detective algorithm combining EM algorithm with Turbo soft decoding is proposed.This paper compares different performance with diversified interleaver length and the other signal detective algorithm.Computer simulations show that the proposed algorithm can achieve much better performance in the simple system model. |
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| Keywords: | MIMO-OFDM EM algorithm Turbo soft decoding feedback iterative |
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