摘要
针对波束域高分辨方位估计存在方位估计偏差大等缺点,提出了将波束形成与独立分量分析融合的宽带高分辨方位估计方法:(1)阵元域数据转换到波束域后,对多波束数据利用基于二阶统计量的独立分量分析算法处理,(2)将波束域独立分量分析融合方法输出结果重构回阵元域信号,(3)对重构后的阵元域数据,使用约束最优化方法改进的MUSIC算法做高分辨方位估计。最后利用ICS(Interactre Circuts & System)声呐模拟器数据和海试数据对算法进行了验证。结果表明:本文方法在弱目标检测、观测区域外强干扰抑制、方位分辨率方面都优先于波束域MUSIC和波束MVDR方法。
To aim at the problem of the beam-space high-resolution bearing estimation algorithm, such as sensitivity to the big bearing estimation bias error, and so on, a broad-band high-resolution bearing estimation method combined with independent component analysis algorithm and beamforming was presented. （1） The independent component analysis algorithm based on second order statistics was used to process the beam-space data; （2） In order to obtain high-resolution bearing estimation, the array-space data were reconstructed using the result from the beam-space independent component analysis fusion method; （3） MUSIC high-resolution algorithm modified by constrained optimized method was used to estimate the target bearing for reconstructed array-space data. It also uses the ICS （Interactre Circuts ＆： System） sonar simulator data and sea trial data to verify the proposed method. The results show the proposed method in the aspects of weak target detection, string interferance suppression and bearing resolution are better than the beam-space MUSIC method and the beam-space MVDR method.
出处
《声学学报》
EI
CSCD
北大核心
2009年第4期303-310,共8页
Acta Acustica
