基于方位走向的潜艇亮点分布特征提取与仿真  

Distribution Feature Extraction and Simulation of Submarine Echo Highlights Based on Target Azimuth Trend

作　　者：徐瑜[1] 赵军[1] 苑秉成[1] 

机构地区：[1]海军工程大学兵器工程系,湖北武汉430033

出　　处：《鱼雷技术》2012年第6期419-423,共5页Torpedo Technology

基　　金：国家自然科学基金项目资助(61074191)

摘　　要：针对传统的潜艇目标回波亮点特征提取方法,只计算有限个峰值点处的方位值来分析目标亮点特征,存在鲁棒性较差的不足,本文基于目标回波与背景干扰相比幅值较大,子回波所体现的方位/距离信息相近等特征,同时结合双通道短时互谱法,提出了一种基于方位走向的潜艇目标回波亮点特征提取方法。首先,采用双通道短时互谱法提取目标回波方位走向特征。然后,通过采用能量判决和利用子回波方位/距离信息,对子回波序列进行分类,从而得到潜艇目标回波亮点的空间分布特征。经仿真验证,该方法与传统方法相比具有更好的鲁棒性。本文的研究结果可为分析潜艇目标声学特性与水声对抗提供参考。Due to the feature extraction method of conventional submarine echo highlight calculates only the azimuth on limited peak points to analyze the target highlight feature, and the robustness is poor. This paper proposes a distribution feature extraction method of submarine echo highlights based on target azimuth trend, by mainly using the characteris- tics that the amplitude of target echo signal is larger than that of noise and the sub-echo signals from the same strong highlight signal embody approximate azimuth and distance information, and combining with the technique of dou- ble-channel short-time cross-spectrum. Firstly, the feature of target azimuth trend is obtained with the technique of dou- ble-channel short-time cross-spectrum. Secondly, the sub-echo signal series is classified by mainly using energy decision and the sub-echo signals＇ azimuth and distance information, and then the spatial distribution feature of submarine echo highlights is achieved. Simulation results show that the proposed method is more robust than the conventional method. This study may provide a reference for analysis of submarine acoustic characteristics and acoustic countermeasure sys- tem.

关 键 词：分裂波束 亮点 尺度识别 互谱 目标方位 

分 类 号：TJ630.34[兵器科学与技术—武器系统与运用工程] TN911[电子电信—通信与信息系统]