摘要
波形选择是雷达系统设计的重要内容,在数字信号处理理论和计算平台的支持下,波形的处理转换为计算的问题,后端处理计算能力的提升极大地拓展了波形的应用场景。相位编码信号具有多普勒敏感特点,为实现匹配滤波,必须对目标可能出现的速度进行补偿,处理过程复杂,在多数雷达系统中应用场景有限。本文提出了相位解调+傅里叶变换构建滤波器组的方法完成相位编码信号的速度补偿,在单个脉冲内实现同时测距测速,针对空间目标的特点,分析了速度、加速度对波形参数的限制,仿真给出了目标遮蔽、处理损耗、测速精度的结果。
Waveform selection is an important issue in radar system design.With the support of digital signal pro⁃cessing theory and computing platforms,the waveform processing is transformed into a computational problem,and the improvement of back⁃end processing computational capabilities has greatly expanded the application scenarios of wave⁃forms.Phase coded signals have Doppler sensitive characteristics,and in order to achieve matched filtering,the possible velocity bias of the target must be compensated,which is a complex processing process and has limited application sce⁃narios in most radar systems.In this paper,we propose a phase demodulation combined with fast Fourier transformation method to construct a filter bank for the velocity compensation of the phase coded signals,achieving simultaneous range and velocity measurement within a single pulse.The limitations of velocity and acceleration on the waveform parameters are analyzed according to the characteristics of spatial targets,and the results of target masking,processing loss and ve⁃locity measurement accuracy are given in simulation.
作者
沙祥
刘永坚
崔国龙
杜亚男
SHA Xiang;LIU Yongjian;CUI Guolong;DU Yanan(University of Electronic Science and Technology of China,Chengdu 611731,China;The 38th Research Institute of China Electronics Technology Group Corporation,Hefei 230088,China;Key Laboratory on Complex Aviation Systems,Beijing 100190,China)
出处
《雷达科学与技术》
北大核心
2023年第6期591-596,共6页
Radar Science and Technology
关键词
相位编码
空间目标
目标遮蔽
傅里叶变换
phase code
spatial target
target masking
fast Fourier transformation
