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电子学报  2015 

基于噪声子空间映射的二维波达角快速估计算法

DOI: 10.3969/j.issn.0372-2112.2015.02.011, PP. 276-282

Keywords: MUSIC,二维DOA估计,空间角度划分,噪声子空间映射,任意阵列结构

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Abstract:

为了降低二维MUSIC(TwoDimensionalMultipleSignalClassification,2-DMUSIC)算法的计算量,提高算法的实时处理能力,基于噪声子空间映射思想提出了一种适用于任意平面阵列结构的二维波达角(DirectionOfArrival,DOA)快速估计算法.新算法利用空间角度划分及非线性变换将信号子空间与噪声子空间的正交性等价地压缩至某个角度分片内,使得真实DOA在该角度分片内产生虚拟镜像,通过搜索该角度分片得到虚拟DOA,最后利用数学式直接计算得到真实DOA.理论分析和实验结果表明新算法能够成倍地提高DOA估计的速度,同时具有比MUSIC算法更高的空间分辨率.

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