一种基于双引导声源和warping变换的拷贝声场计算方法

提出了在均匀浅海环境中只知道少量环境参数的情况下,利用不同距离上的两枚引导声源和warping变换的拷贝声场计算方法。这种方法主要基于简正波估计技术,从声场衰减信息和相位信息两个方向来重构拷贝声场,从而与目标声场匹配进行定位。其优点在于能避免传统的匹配场定位技术中拷贝场计算时对环境模型和环境参数的依赖。在简正波估计技术中采用warping变换的处理方式,数值仿真主要采用线性Bartlett匹配处理器分析了目标定位效果,在信噪比高于1015 dB的情况下,定位效果良好。 

A method of calculating the copy field based on two guide sources and the warping transform

A new method of calculating the copy field by use of two broadband guide sources and the warping transform,in case that a little environment parameters is known in range-independent shallow water environment,is presented.This method,based on normal modes estimation,yields the replica field by calculating the position information and phase information of the field respectively.Also,compared with the traditional method which calculates the copy field by using the priori knowledge of the environment to model the field,it can avoid the dependence on environment parameters and the field model.Warping transform is used to estimate the modes and Linear Bartlett processor is used to give the simulation results.Good results is obtained when the Signal-Noise ratio is higher than 1015 dB.