| 一种改善的MIMO-OFDM系统MAP信道估计 |
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| 引用本文： | 许鹏,汪晋宽,祁峰.一种改善的MIMO-OFDM系统MAP信道估计[J].东北大学学报(自然科学版),2010,31(1):39-42. |
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| 作者姓名： | 许鹏 汪晋宽 祁峰 |
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| 作者单位： | 东北大学,信息科学与工程学院,辽宁,沈阳,110004;天主教鲁汶大学,通信与微波研究所,鲁汶,比利时,B-3001 |
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| 基金项目： | 国家自然科学基金资助项目(60874108) |
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| 摘 要： | 在MIMO-OFDM系统下提出一种最大后验概率(MAP)信道估计算法.该算法利用期望最大化(EM)算法把MIMO信道估计分解为一系列独立的SISO信道问题,降低了MAP算法的计算复杂度.同时,根据在角域内不同发送和接收天线间的信道可近似为空间不相关,利用最有用抽头(MST)技术来减小噪声对估计性能的影响.仿真实验表明,与传统LS和EM算法相比,所提算法在低信噪比下具有较低的估计误差.
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| 关 键 词： | 多输入输出 正交频分复用 信道估计 最大后验概率 期望最大化 角域 |
An Improved MAP Channel Estimation for MIMO-OFDM Systems |
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| XU Peng,WANG Jin-kuan,QI Feng.An Improved MAP Channel Estimation for MIMO-OFDM Systems[J].Journal of Northeastern University(Natural Science),2010,31(1):39-42. |
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| Authors: | XU Peng WANG Jin-kuan QI Feng |
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| Institution: | (1) School of Information Science and Engineering, Northeastern University, Shenyang 110004, China; (2) ESAT-TELEMIC, Katholieke Universiteit Leuven, Leuven B-3001, Belgium |
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| Abstract: | A maximum a posteriori probability (MAP) algorithm was proposed for the multiple-input multiple-output with orthogonal frequency division multiplexing (MIMO-OFDM) systems,which reduces the computation complexity via the expectation maximum (EM) algorithm to decompose the MIMO channel estimation into a series of independent single-input/single-output(SISO) channel estimation. Besides,according to that the MIMO channels between sending and receiving antennae in an angle domain approximate to spatial independe... |
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| Keywords: | MIMO (multiple-input multiple-output) OFDM (orthogonal frequency division multiplexing) channel estimation MAP EM angle domain |
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