基于频差匹配场的水下宽带高频目标被动定位  

Passive Localization of Underwater Broadband High-Frequency Targets Based on Frequency Difference Matching Field

作　　者：黎佳艺 周建波 李少猛 石敏 王雅芬 LI Jiayi;ZHOU Jianbo;LI Shaomeng;SHI Min;WANG Yafen(Unit 91977th,the People’s Liberation Army of China,Beijing 100036,China;School of Marine Science and Technology,Northwestern Polytechnical University,Xi’an 710072,China)

机构地区：[1]中国人民解放军91977部队,北京100036 [2]西北工业大学航海学院,陕西西安710072

出　　处：《水下无人系统学报》2025年第1期74-83,共10页Journal of Unmanned Undersea Systems

基　　金：国家自然科学基金面上项目资助(12274347)。

摘　　要：高频信号在传播过程中易受环境不确定性的影响,导致传统匹配场方法在高频段定位性能退化。为改善这一问题,文中给出了基于频差匹配场的高频信号被动定位方法,对高频带宽内不同频率的阵列接收数据进行二次积处理,以构造远小于原频率差频处的声场结构。在差频处应用已建立的匹配场定位算法,将宽带高频信号降低到低频段处理。首先,给出了频差法的原理并对浅海多径传播到达掠射角进行准确估计,在此基础上,分别给出了适用于浅海和深海的频差匹配场物理模型。最后,通过仿真证明了文中所提方法在不确定环境中对高频信号定位性能明显优于传统方法。High-frequency signals are susceptible to environmental uncertainties during propagation,leading to degradedlocalization performance when using traditional matching field methods.To address this issue,this paper proposed a passivelocalization method for high-frequency signals based on the frequency difference matching field.This method performedquadratic product processing on the received data of arrays at different frequencies within the high-frequency bandwidth,constructing a sound field structure at a difference frequency much lower than the original frequency.By applying theestablished localization algorithm based on the matching field at difference frequency,the high-frequency broadband signalwas reduced to the low-frequency range for processing.Firstly,the principle of the frequency difference method waspresented,and the grazing angle of multipath propagation in shallow water was estimated.On this basis,physical models forfrequency difference matching fields suitable for shallow and deep-sea environments were proposed.Finally,simulation resultsshow that the proposed method substantially outperforms traditional methods in terms of high-frequency signal localization inuncertain environments.

关 键 词：目标被动定位 频差法 匹配场定位 

分 类 号：TJ630.33[兵器科学与技术—武器系统与运用工程] U675[交通运输工程—船舶及航道工程]