EM-based Channel Estimation for MIMO OFDM System

被引：4

作者：

Hu, Gaoping ^{[1
]}

Li, Dong ^{[1
]}

机构：

[1] Commun Univ China, Dept Informat Engn, Beijing, Peoples R China

来源：

NSWCTC 2009: INTERNATIONAL CONFERENCE ON NETWORKS SECURITY, WIRELESS COMMUNICATIONS AND TRUSTED COMPUTING, VOL 1, PROCEEDINGS | 2009年

关键词：

mimo ofdm; channel estimation; expectation maximization;

D O I：

10.1109/NSWCTC.2009.117

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

In this paper, a low complexity adaptive EM-based channel estimation algorithm is proposed for Multiple Input Multiple Output (MIMO) Orthogonal Frequency Division Multiplexing (OFDM) systems in slow time-varying frequency selective environment. The proposed algorithm was an adaptive channel estimation technique based on an expectation maximization (EM) algorithm for space-time block coded (STBC) MIMO OFDM systems. Simulation results show that in slow fading environment there was no degradation in normalized mean square error (MSE) as we increased the number of users. Comparing the Recursive Least-Squares (RLS) algorithm, the proposed algorithm exploits the structure of Alamouti STBC codes to reduce computational complexity.

引用

页码：159 / 162

页数：4

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