New method to extract radial acceleration of target from short-duration signal at low SNR  

作　　者：DU WenChao WANG GuoHong GAO XueQiang 

机构地区：[1]Department of Electronic Information Engineering,Naval Aeronautic Engineering Institute,Yantai 264001,China

出　　处：《Science China(Technological Sciences)》2008年第5期556-575,共20页中国科学（技术科学英文版）

基　　金：the National Natural Science Foundation of China (Grant No. 60541001)

摘　　要：In order to extract target radial acceleration from radar echo signal at low SNR (signal-to-noise), this paper employed FRFT (fractional Fourier transformation) to analyze short-duration radar echo and studied the relations between signal convergence peaks in matched transformation domain and signal duration and modu- lated frequency of signal. When signal duration is specified, the method of multi- plying sampled signal by the known frequency modulated signal to alter modulated frequency was presented, which generated the new signal with larger convergence peaks than the initial signal in matched transformation domain. Thus, it could successfully estimate the radial acceleration of radar target at low SNR. Simulations were conducted to show the feasibility and effectiveness of the method.In order to extract target radial acceleration from radar echo signal at low SNR (signal-to-noise), this paper employed FRFT (fractional Fourier transformation) to analyze short-duration radar echo and studied the relations between signal convergence peaks in matched transformation domain and signal duration and modulated frequency of signal. When signal duration is specified, the method of multiplying sampled signal by the known frequency modulated signal to alter modulated frequency was presented, which generated the new signal with larger convergence peaks than the initial signal in matched transformation domain. Thus, it could successfully estimate the radial acceleration of radar target at low SNR. Simulations were conducted to show the feasibility and effectiveness of the method.

关 键 词：estimation FRFT RADICAL ACCELERATION radar 

分 类 号：TN911[电子电信—通信与信息系统]