基于波导不变性的水平阵列测距研究

Research on the source ranging with the horizontal array based on the waveguide invariant theory

基于波导不变性理论,利用水平线列阵,提出一种新的水下目标声源距离估计算法。该方法相比于匹配场定位而言,具有较好的环境宽容性。文中通过引导声源和阵列信息这2种模式实现目标声源的距离估计。该算法不需要确知海洋环境的具体参数以及声场传播模型,通过一个已知距离的引导声源或者利用阵列信息,实现目标声源距离估计。计算机仿真结果表明,2种模式都能很好地实现目标声源估距,且估计误差较小,可为水下目标声源定位提供一种新途径。

Conventional array processing algorithms,such as matched-field processing（ MFP）,require precise knowledge of the medium between the source and the receiving array,but the new method based the waveguide invariance theory using the horizontal array relaxes this stiff requirement. The distance estimate algorithm includes two kinds of modes,using guide source and using information of the horizontal array. The method makes use of the array basic information or a guide source that has already known distance,basing on the waveguide invariance theory,no information of the environment. The result of the analysis and simulation show that the two modes can obtain the objective source range,and the error is small.