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基于无迹卡尔曼滤波的MIMO-OFDM系统信道估计算法
引用本文:顾婷婷,罗汉文,梁永明.基于无迹卡尔曼滤波的MIMO-OFDM系统信道估计算法[J].高技术通讯,2008,18(6):585-589.
作者姓名:顾婷婷  罗汉文  梁永明
作者单位:上海交通大学电子信息与电气工程学院,上海,200240
摘    要:基于对现有MIMO-OFDM系统信道估计技术及其理论的分析,提出了一种基于无迹卡尔曼滤波(UKF)的信道估计算法。该算法不需要信道的任何先验统计信息,从频域出发,首先利用最小二乘(LS)算法得到导频处信道的粗略估计值,再在时域运用路径捕获法和UKF算法得到信道的精确估计值。仿真结果表明,与LS算法、最小均方(LMS)算法等相比,该算法在较低运算复杂度下可以获得信道估计性能的明显改善。

关 键 词:MIMO-OFDM  信道估计  无迹卡尔曼滤波  路径捕获

An UKF-based channel estimation algorithm for MIMO-OFDM systems
Gu Tingting,Luo Hanwen,Liang Yongming.An UKF-based channel estimation algorithm for MIMO-OFDM systems[J].High Technology Letters,2008,18(6):585-589.
Authors:Gu Tingting  Luo Hanwen  Liang Yongming
Affiliation:School of Electronic;Information and Electrical Engineering;Shanghai Jiaotong University;Shanghai 200240
Abstract:Based on the technological and theoretical analyses of present channel estimation algorithms for MIMO-OFDM sys- tems,the paper proposes an unscented Kahnan filter (UKF)-based channel estimation algorithm which needs no prior knowledge of channel statistics.The proposed algorithm firstly makes use of the least square (LS) method to get rough es- timation information for pilot channels in the frequency domain,and then achieves precise channel information in the time domain by using the significant tap catchin...
Keywords:MIMO-OFDM  channel estimate  UKF  significant-tap-catching  
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