| 一种基于MIMO-OFDM系统快速收敛盲信道估计方法 |
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| 引用本文： | 陈国军,胡捍英,巴斌,周游.一种基于MIMO-OFDM系统快速收敛盲信道估计方法[J].信息工程大学学报,2013,14(6):673-679. |
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| 作者姓名： | 陈国军 胡捍英 巴斌 周游 |
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| 作者单位： | 信息工程大学，河南 郑州 450001 |
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| 摘 要： | 针对基于循环前缀（cyclic prefix,CP）的MIMO-OFDM系统,提出一种快速收敛的子空间盲信道估计方法.该方法利用循环前缀特性对信道矩阵进行重构,重构矩阵具有和Toeplitz矩阵相似的结构,利用此特殊结构结合传统子空间算法可以有效地减少算法所需数据量,进而提高了算法的收敛速度.另外,文中给出了信道盲辨识条件并进行了相应说明.仿真结果表明所提算法有效,适当选取参数可以大大提高算法收敛速度.
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| 关 键 词： | MIMO-OFDM系统 盲信道估计 子空间 |
Blind Channel Estimation with High Speed Convergence Based on MIMO-OFDM System |
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| CHEN Guo jun,HU Han ying,BA Bin,ZHOU You.Blind Channel Estimation with High Speed Convergence Based on MIMO-OFDM System[J].Journal of Information Engineering University,2013,14(6):673-679. |
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| Authors: | CHEN Guo jun HU Han ying BA Bin ZHOU You |
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| Affiliation: | Information Engineering University, Zhengzhou 450001, China |
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| Abstract: | A subspace based blind channel estimation method with high convergence rate is proposed to deal with MIMO OFDM systems which are based on cyclic prefix. It uses cyclic prefix features to restructure the channel response matrix which has a structure similar to Toeplitz matrix. The method joints the special structure and the traditional subspace algorithm in order to reduce requested data amount. Consequently, the convergence speed and accuracy are improved. In addition, the conditions of blind channel identification are given and are explained. Simulation results show that the proposed scheme is efficient and suitable parameters can be used to improve the algorithm convergence rate. |
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| Keywords: | MIMO-OFDM systems blind channel estimation subspace |
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