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理论证明线性信号处理可以分辨两个不完全相关的目标。针对宽带双目标问题,根据矢量水听器信号模型,设计了并行的两路结构相同的处理通道,每个通道先将接收信号做子空间旋转,分离出单个目标,然后用空间匹配滤波方法估计该目标方位。仿真研究表明,该方法适用于任意频谱结构的信号,对目标强度差和初值误差的宽容性好,可以全方位跟踪目标而性能不受目标具体方位影响,并具有时间带宽增益,在相关目标或者低信噪比情况下的性能优于宽带聚焦子空间方法。海试数据验证了该方法的可行性。该方法是一种比较实用的水下双目标分辨与跟踪方法。
Theory proves that linear signal processing can distinguish two incompletely related targets. According to the vector hydrophone signal model, two parallel processing channels with the same structure are designed. For each channel, the received signal is first spatially rotated to separate a single target, and then the spatial matching filter is used to estimate The target position. The simulation results show that the proposed method is suitable for the signal of any spectral structure and has good tolerance to the target intensity difference and initial value error. It can track the target omni-directionally while the performance is not affected by the target specific azimuth, and has the time bandwidth gain. Or better performance than the broadband focused subspace method at low signal-to-noise ratios. Sea trial data verify the feasibility of this method. The method is a more practical method of underwater two-target discrimination and tracking.