摘要
针对水下声速引起的超声成像系统成像帧率不高的问题,提出一种采用伪随机编码线性调频波(平衡Gold-LFM)作为发射信号的高帧率水下声呐成像方法。该方法通过依次发射相互正交的伪随机编码调制线性调频波,结合通道分离技术和波束形成技术,实现不同信号的通道分离与高帧率成像。仿真实验表明所提出的基于平衡Gold-LFM复合信号的成像方法可以实现回波信号的通道分离和提高成像帧率,同时能够降低图像伪影,具有较好的成像信噪比。
In order to solve the problem of low frame rate caused by underwater sound speed,a high frame rate of underwater sonar imaging method using pseudo-random coded LFM(balance Gold LFM)as transmitting signal is proposed.In this method,the orthogonal pseudo-random code modulation LFM wave is transmitted in turn,and the channel separation technology and beamforming technology are combined to realize the channel separation and high frame rate imaging of different signals.The simulation results show that the proposed imaging method based on balanced gold LFM composite signal can realize the channel separation of echo signal and improve the imaging frame rate,at the same time,it can reduce the image artifacts and has a good imaging signal-to-noise ratio.
作者
李鹏
俞传富
LI Peng;YU Chuanfu(Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology,Nanjing University of Information Science and Technology,Nanjing Jiangsu 210044,China;Jiangsu Key Laboratory of Meteorological Observation and Information Processing,Nanjing University of Information Science and Technology,Nanjing Jiangsu 210044,China;Binjiang College,Nanjing University of Information Science and Technology,Wuxi Jiangsu 214105,China)
出处
《电子器件》
CAS
北大核心
2021年第5期1221-1226,共6页
Chinese Journal of Electron Devices
基金
国家自然科学基金项目(41075115)
江苏省重点研发计划社会发展项目(BE2015692)。
