【摘要】 由于目标特征和水声信道的复杂性,阵列所接收的往往是宽带信号,它具有携带目标回波信息量大、混响背景相关性弱的特点,因此有利于信号的检测、参数估计和目标特征的提取。声矢量阵单个阵元能同时测量声场中的声压量和3个正交的质点振速分量,相对于声压阵,它能获取更多的声场信息。因此论文通过均匀声矢量阵运用FFT插值和RSS聚焦的MUSIC算法对宽带相干源DOA估计进行了研究,改善了对弱相干信号源的方位分辨和估计性能,实验所获得的仿真结果表明了该方法具有较高的参考价值。更多还原

【Abstract】 Because of the complexity of the targets and the underwater acoustic channels, what the array received are usually the wide-band signals, which have the traits of taking more echo information and the weak relativity of reverberation. So they are available for signal detecting, parameters estimating and distilling of targets’ characteristic. Each element of acoustic vector array measures the acoustic pressure and three orthogonal components of acoustic particle velocity in a sound field. The main advantage of these vector sensors over traditional scalar sensor is that they make use of more available acoustic information. So in this paper, the DOA of wide-band coherent-signal sources are studied using FFT interpolation algorithm and RSS focusing method based on acoustic vector array. This new method maintains good DOA estimation and spatial resolution capability in weak correlated source signals. The better simulation results indicate that the method has much value of reference.更多还原