一种应用于OFDM系统的MUSIC改进算法

根据OFDM信号在频域由多个子载波构成的特点,提出了适用于OFDM系统的阵列信号处理模型。并利用子载波的正交性,推导出一种可以应用于OFDM系统的MUSIC改进算法。该算法将MUSIC空间谱表示为各子载波空间谱的叠加,并可在不同信道特性下,选择不同的子载波数量,以在较小的运算量下达到较佳的性能。在此基础上,提出实用方案,并通过仿真验证了该算法的性能。

An Improved MUSIC Algorithm for OFDM Systems

This paper presents an array signal processing model suitable for OFDM systems,by exploiting the properties of OFDM signals which are composed of a cluster of subcarriers in frequency domain,and proposes an improved MUSIC algorithm for OFDM systems,which is based on the orthogonal property of subcarriers.This paper expresses the whole MUSIC spatial spectrum as the combination of the spatial spectrum of subcarriers,and adjusts the number of subcarriers in different channels,which may achieve good performances with very low complexity.Based on that,a practical scheme is proposed,and the performance of this algorithm is investigated through computer simulations.