水听器混合阵列MUSIC方位估计研究

Study on Mixed Hydrophone Arrays' DOA Estimation Based on MUSIC Algorithm

实际应用中,矢量水听器阵列是声压水听器阵列通道数的三倍(二维矢量水听器阵列)或四倍(三维矢量水听器阵列),其相应的数据量、信号处理复杂度及成本亦明显增加。在阵列中混合配置声压水听器与矢量水听器,是一种解决该问题的有效途径。利用多重信号分类法(MUSIC),对五种配置的水听器混合阵列进行研究,分析在不同信噪比、目标相对运动时对方位估计的影响。仿真表明,在有相同数目矢量水听器时,水听器混合阵列间隔配置比集中配置要好;在目标方位未知的情况下,在中间配置一个矢量水听器比在一端配置要合理。

In applications,a vector hydrophone array could triple or quadruple the number of channels which dramatically increased cost,computational complexity and sample support requirement.To mix vector hydrophones with pressure hydrophones was an effective method.Five representative configurations of mixed hydrophone arrays were studied.In Gauss noise circumference,the models＇ direction-of-arrival（DOA） was analyzed through MUSIC algorithm.Different SNR and one target movement brought out vary effects to DOA.Computer simulation results showed that alternate configuration was superior to center configuration if there were the same number of acoustic vector hydrophones;the vector hydrophone was disposed at the middle of the array was relatively reasonable to be disposed at the center.