基于谱函数二阶导数的波达方向估计

Pan Qiufu,Sun Man,Yu Xiaoling

Computer Applications and Software(2022)

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Abstract
针对多重信号分类算法(multiple signal classification,MUSIC)在低信噪比、小快拍数或信源角度相近等复杂环境下波达方向(Direction of arrival,DOA)估计性能严重下降这一问题,提出一种新的基于谱函数二阶导数的DOA估计算法.利用MUSIC空间谱函数的二阶导数能在原始波达方向周围产生负峰值的特性,通过对二阶导数空间谱进行负峰值搜索实现DOA估计.实验结果表明,在低信噪比、小快拍数或信源角度接近的情况下,该方法能准确进行DOA估计,且性能明显优于经典MUSIC算法.
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