基于二指向性接收阵元强度差的定向方法

水声领域中常用的高频定向算法通常基于时延或相位,这些方法受半波长布阵的限制,当信号频率超过一定限度时会产生角度模糊,从而影响方位估计效果。本文提出利用声轴方向有一定开角的有指向性水听器来引入不同阵元接收信号的强度差,利用强度差来估计目标的方位。这种方法由于不涉及相位或时延信息,一定条件下解决了高频声源定向过程中的角度模糊问题,并通过仿真和试验数据对算法性能进行了验证。

Localization method based on the intensity differences between two directional receiving array elements

In underwater acoustics, most of the localization algorithms for high frequency signals are based on the time-delay or the phase. Because of the limitatied distance between the hydrophones, when the frequency surpasses certain values, the problem of angle ambiguity will appear. This paper proposes a method based on the intensity differences between the signals received by hydrophones whose sound axises pointing to different directions. This method does not have relationship with the time-delay or the phase, so it solves the problem of the angle ambiguity under certain conditions, and it is proved to be effective according to the simulation and experiment data.