FRFT Based Parameter Estimation of the Quadratic FM Signal  

作　　者：QU Qiang JIN Minglu KIM Jae Moung 

机构地区：[1]School of Electronic and Information Engineering, Dalian University of Technology, Dalian 116024, China [2]School of Electronic and Information Engineering, University of Science and Technology Liaoning, Anshan 114051, China [3]Graduate School of IT＆ Telecommunications, Inha University, Incheon 402751, Korea

出　　处：《Chinese Journal of Electronics》2010年第3期463-467,共5页电子学报（英文版）

基　　金：This work is supported by the National Natural Science Foundation of China （No.60871046）.

摘　　要：This paper generalizes the Fractional Fourier transform （FRFT） to estimate the parameters of the Quadratic frequency modulated （QFM） signal. Firstly, the proposed algorithm transforms the QFM signal into the Linear frequency modulated （LFM） signal by means of the instantaneous autocorrelation function, and then the parameter estimation of the QFM signal is performed by the FRFT and dechirping method. In order to calculate discrete sampling values of the FRFT, an adaptive FRFT algorithm based on the Least mean square （LMS） is proposed. Extension to the multlcomponent and higher order frequency modulated signals is also discussed. Finally, the effects of delay parameter on estimation performances are investigated through Monte Carlo simulations and the results of simulations verify the effectiveness of the proposed algorithm.

关 键 词：Quadratic FM signal Parameter estimation Fractional Fourier transform （FRFT） Adaptive filter. 

分 类 号：TN957.51[电子电信—信号与信息处理] TN971.5[电子电信—信息与通信工程]