一种空时块编码OFDM系统中的自适应均衡算法

邵怀宗; 彭启琮; 李玉柏

一种空时块编码OFDM系统中的自适应均衡算法

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出版历程
- 收稿日期: 2002-08-14
- 修回日期: 2003-03-27
- 刊出日期: 2004-02-19

An Adaptive Equalization Algorithm in Space-Time Block Coded OFDM System

摘要

摘要: 该文提出了一种适用于Alamouti块编码的多天线发射的OFDM系统的自适应均衡算法。该算法充分利用了Alamouti编码的正交特性和多发射天线的OFDM系统特点,通过灵活的变换对接收信号进行等价的表示;通过对П矩阵求逆的研究使块最小二乘递推算法(BRLS)中的2K2K的矩阵求逆分解为K个22矩阵的求逆,从而降低了运算量和接收机的复杂度。计算机仿真结果证明了该自适应均衡算法的有效性和快速收敛性。
- 空时块编码的OFDM（STBCOFDM）系统; 自适应均衡接收机; 块最小二乘算法; П矩阵
Abstract: In this paper, an adaptive equalization algorithm used in Space-Time Block Coded (STBC) OFDM system with Alamouti scheme is proposed. In term of the orthogonal property of Alamouti scheme and the character of the OFDM system with multiple antenna transmitter, the proposed algorithm gets an equivalent model expression of receiver signal for STBC-OFDM system by flexible transform method; Studying on II matrix, inverse of size of 2K2K matrix in Block RLS(BRLS) can be obtained by getting the inverse of K matrices of 22 gotten by decomposing it, so that the complexity of computation and receiver has been decreased. The simulation results prove the validity and property of fast convergence of the proposed algorithm.

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