摘要
Keystone变换(Keystone Transform,KT)是一种经典的雷达目标距离走动校正工具,现有诸多实现方法中以基于线性调频Z变换(Chirp-Z Transform,CZT)和快速傅里叶逆变换(Inverse Fast Fourier Transform,IFFT)的“CZT+IFFT”方法计算量最低.本文针对“CZT+IFFT”方法存在的频谱混叠问题,提出修正的“CZT+IFFT”方法,同时运用时间尺度(Time-Scaling,TS)和尺度估计(Scale-Estimation,SE)概念,进一步提出2种梅林域的KT实现方法.仿真试验验证了分析结论的正确性和所提方法的有效性.
Keystone transform(KT)is a classical target range migration correction method in radar.Among the existing implementation methods,the method based on the chirp-z transform(CZT)and inverse fast fourier transform(IFFT)has the lowest amount of calculation.Aiming at the spectrum aliasing problem in the above“CZT+IFFT”method,this paper proposes a modified“CZT+IFFT”method.At the same time,appling the concepts of time-scaling(TS)and scale-estimation(SE),the other two KT implementation methods in mellin transform(MT)domain are further proposed.Simulation results verify the correctness of analysis conclusion and the effectiveness of proposed methods.
作者
张亮
张翔宇
王国宏
ZHANG Liang;ZHANG Xiang-yu;WANG Guo-hong(Institute of Information Fusion,Naval Aviation University,Yantai,Shandong 264001,China;Unit 94326 of PLA,Jinan,Shandong 250000,China;Department of Avionics Engineering and Command,Naval Aviation University,Qingdao,Shandong 266041,China;College of Information and Communication Engineering,North University of China,Taiyuan,Shanxi 030023,China)
出处
《电子学报》
EI
CAS
CSCD
北大核心
2022年第5期1218-1226,共9页
Acta Electronica Sinica
基金
国家自然科学基金(No.61731023)
山东省自然科学基金(No.ZR2020QF071,No.ZR2020MF015)
博士后科学基金(No.2021M693003)
泰山学者攀登计划专项经费资助。
