基于GMUSIC的少快拍宽带阵列波达方向估计方法

Research on algorithms for wideband signals and short-snapshot signals based on GMUSIC

随着电子信息技术迅猛发展,宽带信号在各种电子信息系统中的应用越来越普遍。目前,常用的宽带信号波达方向估计算法往往需要大量的信号样本数据支持,以达到优良的估计性能。由于实际系统常需要快速响应,无法提供大量样本,现有宽带DOA估计算法在少快拍条件下的估计会出现性能的严重下降现象。文章结合常用宽带DOA估计算法与少快拍DOA估计算法,提出一种基于随机矩阵理论(GMUSIC)的少快拍宽带信号DOA估计算法。新算法对于邻近空间的少快拍宽带相干信号的波达方向估计有很好的效果,仿真结果验证了该算法的有效性。

With the development of electronic information technology,wideband signals have been used more and more commonly in many system. The classical algorithms need sufficient data to reach a better performance. However, signals with short snapshots will get bad estimations of the sample covariance matrix because of insufficient data. A new algorithms for wideband signals and short-snapshot signals based on GMUSIC is proposed. The new algorithm has a good effect on the direction of arrival estimation of less fast beat broadband coherent signals in adjacent space, and the simulation results verify the effectiveness of the algorithm.