基于水下目标线谱特征的运动参数估计方法  

Motion Parameter Estimation Method Based on Line Spectrum Characteristics of Underwater Target

作　　者：张杨 刘成明 李萍 程飞 ZHANG Yang;LIU Chengming;LI Ping;CHENG Fei(Unit 92578 of PLA,Beijing 100069,China;The 716th Research Institute of China Shipbuilding Industry Corporation,Beijing 100161,China;Unit 92055 of PLA,Shanghai 200063,China)

机构地区：[1]解放军92578部队,北京100069 [2]中国船舶集团有限公司第七一六研究所,北京100161 [3]解放军92055部队,上海200063

出　　处：《指挥信息系统与技术》2022年第6期70-74,94,共6页Command Information System and Technology

摘　　要：为了提高水下目标运动参数解算的准确率,对目标水声信号进行了时频分析,提取了目标线谱特征,建立了基于多普勒频移效应的观测方程,并通过求解超定方程组对目标运动参数进行估计。首先,分析了短时傅里叶变换(STFT)、魏格纳-威尔分布(WVD)和希尔伯特-黄变换(HHT)的适用条件;然后,提出了时频图灰度变换、滤波降噪、边缘检测和Radon变换等线谱提取方法步骤;最后,根据实测数据对目标运动参数估计模型进行了微调,提升了目标速度参数估计的准确率。In order to improve the calculation accuracy of underwater target motion parameters, the time-frequency analysis of underwater acoustic signals are carried out, the target line spectrum characteristics are extracted, the observation equation based on Doppler frequency shift effect is established, and the target motion parameters are estimated by solving the over-determined equations. Firstly, the applicable conditions of short-time Fourier transform(STFT)、 Wigner-Ville distribution(WVD) and Hilbert-Huang transform(HHT)are analyzed. Then, the steps of spectrum extraction methods such as time-frequency diagram gray transform, filtering noise reduction, edge detection and Radon transform are proposed. Finally, the model of target motion parameter estimation is fine-tuned according to the measured data, and the accuracy of target velocity parameters estimation is improved.

关 键 词：水下目标 时频图 线谱提取 观测方程 参数估计 

分 类 号：E917[军事] TB566[交通运输工程—水声工程]