基于互模糊函数的高亚音速目标声学跟踪方法  

Acoustic Tracking of High Subsonic Targets Based on Cross Ambiguity Function

作　　者：陈昭男 付军[1] 秦亮亮[1] 李鹏 CHEN Zhaonan;FU Jun;QIN Liangliang;LI Peng(Unit 91550,PLA,Dalian 116023,China;Unit 91604,PLA,Yantai 265700,China)

机构地区：[1]中国人民解放军91550部队,辽宁大连116023 [2]中国人民解放军91604部队,山东烟台265700

出　　处：《无线电通信技术》2020年第4期458-464,共7页Radio Communications Technology

基　　金：国家自然科学基金项目(61801481)。

摘　　要：针对亚音速低空运动目标声信号特征不明确所导致的定位跟踪困难的问题,从不同路传声器接收信号的差异性入手,通过对目标到达时间差和时间比例尺差的估计,建立了基于互模糊函数的目标运动参数估计模型。在通过极大似然估计方法或者利用先验信息得到初始时刻目标运动参数后,后续时刻的目标运动参数根据目标运动方程和传感器观测方程,采用贝叶斯递推状态估计算法来实现。仿真结果表明,该方法可以实现对目标的稳定跟踪,且定位精度较高,具有较好的应用前景。Aimed at the challenges in positioning and tracking of the subsonic low altitude maneuvering targets caused by the unknown emitting acoustic signals,we estimate the time difference of arrival and scale difference of arrival on the basis of the difference of several received signals.And an estimate model of maneuvering parameters is established using cross ambiguity function.For the estimation of initial maneuvering parameters,we adopt the ML method or the prior information.Follow-up parameters are estimated by the Bayes recursive state estimation method based on the sensor observation equation and target maneuvering equation.Simulation results show that this method can steadily track the target with high precision.The proposed method has good application prospects.

关 键 词：低空运动目标 互模糊函数 声学跟踪 定位 

分 类 号：TN911.7[电子电信—通信与信息系统]