Universal FRFT-based algorithm for parameter estimation of chirp signals  

作　　者：Rong Chen Yiming Wang 

机构地区：[1]School of Electronics and Information Engineering,Soochow University,Suzhou 215006,P.R.China [2]National Laboratory of Information Control Technology for Communication System,Jiaxing 314001,P.R.China

出　　处：《Journal of Systems Engineering and Electronics》2012年第4期495-501,共7页系统工程与电子技术（英文版）

基　　金：supported by the National Natural Science Foundation of China (60872003; 61071214);the Doctoral Fund of Ministry of Education of China (20093201110005);the Foundation of Chinese National Defense Technology Key Laboratory (9140C1301031001)

摘　　要：The realization of the parameter estimation of chirp signals using the fractional Fourier transform （FRFT） is based on the assumption that the sampling duration of practical observed signals would be equal to the time duration of chirp signals contained in the former. However, in many actual circumstances, this assumption seems unreasonable. On the basis of analyzing the practical signal form, this paper derives the estimation error of the existing parameter estimation method and then proposes a novel and universal parameter estimation algorithm. Furthermore, the proposed algorithm is developed which allows the estimation of the practical observed Gaussian windowed chirp signal. Simulation results show that the new algorithm works well.The realization of the parameter estimation of chirp signals using the fractional Fourier transform （FRFT） is based on the assumption that the sampling duration of practical observed signals would be equal to the time duration of chirp signals contained in the former. However, in many actual circumstances, this assumption seems unreasonable. On the basis of analyzing the practical signal form, this paper derives the estimation error of the existing parameter estimation method and then proposes a novel and universal parameter estimation algorithm. Furthermore, the proposed algorithm is developed which allows the estimation of the practical observed Gaussian windowed chirp signal. Simulation results show that the new algorithm works well.

关 键 词：fractional Fourier transform （FRFT） chirp signal parameter estimation observation window. 

分 类 号：TN911.23[电子电信—通信与信息系统]