运动目标时空频信号变换与多维信息关联  

Signal space transform and multidimensional information joint processing for moving target

作　　者：石蕴佳 朴胜春 郭俊媛[1,2,3] 张柳 SHI Yunjia;PIAO Shengchun;GUO Junyuan;ZHANG Liu(National Key Laboratory of Underwater Acoustic Technology,Harbin Engineering University,Harbin 150001;Key Laboratory of Marine Information Acquisition and Security(Harbin Engineering University),Ministry of Industry and Information Technology,Harbin 150001;College of Underwater Acoustic Engineering,Harbin Engineering University,Harbin 150001)

机构地区：[1]哈尔滨工程大学水声技术全国重点实验室,哈尔滨150001 [2]工业和信息化部海洋信息获取与安全工信部重点实验室(哈尔滨工程大学),哈尔滨150001 [3]哈尔滨工程大学水声工程学院,哈尔滨150001

出　　处：《声学学报》2023年第5期920-936,共17页Acta Acustica

基　　金：国家自然科学基金项目(11904065)资助。

摘　　要：提出了一种针对水中匀速直线运动目标的时空频信号变换方法。首先对接收信号作时频分析和频域波束形成,根据选定的目标航向对频率-方位-时间三维信号空间中的接收信号进行由基阵坐标系到目标坐标系的视在方位变换,使目标线谱信号由三维空间轨迹变换为变换域中对应平面切片上的二维轨迹,该切片由频率与方位信息联合构成的轴和时间轴构成。研究结果表明,该方法能够在变换后的信号空间中将目标线谱信号的三维轨迹转换为相应切片上的二维轨迹,相比三维信号空间更容易获得多维信息联合处理的信号处理增益。A signal space transform method for detection of line spectrum signals radiated by moving target is proposed.With timefrequency analysis and beamforming processing,a three-dimensional(3D)time-frequency-azimuth signal space is obtained in the array coordinate system.Given certain target course angle,this 3D signal space is transformed to the time-frequency-relative bearing spectrum signal space in the target coordinate system.The findings demonstrate that the method is capable of converting the target line spectrum signal 3D trajectory to a 2D trajectory on the corresponding slice in the transformed signal space,and signal processing gain of multi-dimensional information joint processing is obtained easier than in 3D signal space.

关 键 词：运动目标 坐标变换 多维信息关联 RADON变换 

分 类 号：TB56[交通运输工程—水声工程]