未知信源数的宽带波束域相干源测向算法  

Broadband Beam Space DOA Estimation Algorithm of Coherent Sources Without Sources Number

作　　者：王彬如[1] 熊键[1] 石敖广[1] 杨世兴[1] 

机构地区：[1]信息综合控制国家重点实验室,成都610036

出　　处：《电子信息对抗技术》2010年第2期28-33,共6页Electronic Information Warfare Technology

摘　　要：对MUSIC算法进行了改进,提出了一种无需估计信源数的宽带波束域相干源测向算法,避免了由于信源数估计不准确以及存在相干源扰动时的测向失效问题,并通过恒定束宽波束形成,在减少测向计算量的同时,对宽带信号进行了空间聚焦,可同时适用于窄带信号和宽带信号测向,大大拓展了MUSIC算法的适应能力,为其在不同领域获得广泛应用扫清了算法上的障碍。仿真结果证实了所提出改进算法的有效性。A modified MUSIC algorithm based on broadband beam space is introduced, which can be applied to coherent sources without sources number. This algorithm can resolve the problem that MU- SIC algorithm is not effective under unknown sources number and coherent sources conditions. Fur- thermore, it can reduce computation of D0A estimation and focus broadband sources with constant beam-width beam-forming. And it is effective for both narrowband and broadband signals, and would be applied in most fields about MUSIC algorithm. Computer simulation results approve the validity of this new algorithm.

关 键 词：信源数 宽带波束域 恒定束宽 空间聚焦 相干源 DOA估计 

分 类 号：TN971.1[电子电信—信号与信息处理]