单矢量水听器方位估计的柱状图方法

A histogram approach of the azimuth angle estimation using a single vector hydrophone

单矢量水听器可以估计目标方位,矢量水听器信号处理中用到的平均声强器的处理方法能很好地抗各向同性的非相干干扰,但不能抗相干干扰。文中提出了一种新的单矢量水听器方位估计方法柱状图方位估计法,介绍了该方法的原理;对宽带信号中含强线谱相干干扰的情况进行了计算机仿真,结果表明该方法在强线谱相干干扰下能有效检测目标、估计目标方位;海试结果验证了该方法抗强线谱相干干扰的有效性。

With a single vector hydrophone, we can get the azimuth angle of a target, An acoustic intensity averager is often used in the vector sensor signal processing; it can effectively suppress non-coherent interference, but can not suppress coherent interference. A newer azimuth angle estimation approach based on a single vector hydrophone, which is called histogram statistical azimuth angle estimation, is put forward in this paper. The principle of the approach is shown at first. Then a simulation of the situation is given, in which there is a line-spectra coherent interference in the continuous spectra signal. The result of simulation indicates that we can effectively detect the target and estimate its azimuth angle in a coherent interference background using this approach. Finally, the result of a sea trial shows the validity of suppressing the coherent line-spectra interference.