被动声呐的高分辨率目标方位估计

THE HIGH RESOLUTION DOA ESTIMATION FOR THE PASSIVE SONAR

本文讨论应用高分辨率非线性谱分析技术进行水声目标方位的估计。文中针对水声信号特点，通过主值频谱抽取方法克服宽频带非线性方位估计的大运算量难题，大大简化了计算复杂性，同时还保证了较高的信噪比。经模拟计算表明，该方法实现简单。

This paper proposes a direction finding method of underwater targets. A nonlinear spectrum estimation technique with high resolution is used in the method. And the nonlinear direction estimation is calculated only on some main frequencies. Thus,an obstacle that a large number of operations are needed in nonlinear direction estimation for wide band sound sources is overcome and a high ratio of signal to noise is obtained. Model examination demonstrates that the method is easy to be realized and its direction resolution is higher than that of the general beamform method.