单矢量水听器的高分辨方位估计应用研究

摘要

为了提高单矢量水听器的目标分辨能力,将MUSIC算法用于单矢量水听器方位估计.根据单矢量水听器的阵列流型特点,将子空间分解理论应用到单矢量水听器方位估计上,实现了单个矢量水听器的高分辨方位估计.根据应用中出现的问题,对算法进行改进.计算机仿真结果表明,在无需知道信号先验信息条件下,该算法依靠单个矢量水听器便可实现窄带信号和宽带信号的高分辨方位估计,而且在足够高的信噪比条件下,能够达到渐进无偏估计.湖试数据的处理结果验证了改进算法的有效性.%In order to increase the resolving power for only using a single acoustic vector-sensor, the MUSIC algorithm is applied to the DOA ( direction of arrival) estimation. Taking into account the characteristic of single coustic vector-sensor, the high-resolution DOA estimation based on subspace decomposing theory is realized. According to the problem apprearing in the application, the improved algorithm is advanced. Simulation indicates that the result using the algorithm achieves the high-resolution DOA estimation whether narrowband or wideband signal with theirs information unknown and obtains the gradually a-gonic estimation without bias when the SNR (signal-to-noise ratio) is high. The result of processing data testifies to the validity of improved algorithm.