维纳内插线性非均匀阵列的宽带DOA估计  

Wideband DOA Estimation For Nonuniform Linear Arrays With Wiener Interpolation

作　　者：漆万鹏 张雨强 

机构地区：[1]海军驻武汉四三八厂军事代表室,武汉430060 [2]大连测控技术研究所,大连116013

出　　处：《中国科技信息》2012年第24期51-52,共2页China Science and Technology Information

摘　　要：本文研究线性非均匀阵列(NLA)的相干宽带DOA估计。内插阵列用于实现两组映射。第一组,NLA映射到具有相同阵列孔径的均匀线性阵列。第二组,每一频率的相关矩阵都被映射到相应的中心频率来进行相干DOA估计。使用维纳公式实现阵列内插,并使用最大似然方法对信号和噪声的功率进行估计。比较不同的方法并得出宽带处理相对于窄带处理的优点。维纳内插阵列对信噪比估计的精度较高,并且明显改善了窄带处理和宽带处理的DOA估计的性能。Coherent wideband D0A estimation for non uniform linear arrays （NLA） is considered. Array interpolation is used for two mappings. In the first mapping, NLA is mapped to a uniform linear array with the same array aperture. In the second mapping covariance matrices for each frequency bin are mapped to a single one at the center frequency for coherent DOA estimation. A Wiener formulation is used for array interpolation where both signal and noise powers are estimated with maximum likelihood method. Different approaches are compared and the advantages of wideband processing versus narrowband processing are outlined. The accuracy of the SNR estimation is high and it is shown that Wiener array interpolation significantly improves the DOA estimation performance in both narrowband and wideband processing.

关 键 词：线性非均匀阵列 DOA 维纳内插 

分 类 号：TN911.23[电子电信—通信与信息系统]