Design and simulation of digital channelized receivers in fractional Fourier domain

作     者：Pengfei Tang Bin Yuan Qinglong Bao Zengping Chen 

作者机构：ATR Key LabSchool of Electronic Science and EngineeringNational University of Defense Technology 

出 版 物：《Journal of Systems Engineering and Electronics》 (系统工程与电子技术（英文版）)

年 卷 期：2013年第24卷第1期

页      面：36-43页

核心收录：

学科分类：0810[工学-信息与通信工程] 08[工学] 081001[工学-通信与信息系统] 

基　　金：supported by the Program for New Century Excellent Talents in University(NCET-06-0921) 

主　　题：digital channelized receiver fractional Fourier domain(FRFD) convolution theorem sampling theorem. 

摘      要：An approach is proposed to realize a digital channelized receiver in the fractional Fourier domain （FRFD） for signal intercept applications. The presented architecture can be considered as a generalization of that in the traditional Fourier domain. Since the linear frequency modulation （LFM） signal has a good energy concentration in the FRFD, by choosing an appropriate fractional Fourier transform （FRFT） order, the presented architecture can concentrate the broadband LFM signal into only one sub-channel and that will prevent it from crossing several sub-channels. Thus the performance of the signal detection and parameter estimation after the sub-channel output will be improved significantly. The computational complexity is reduced enormously due to the implementation of the polyphase filter bank decomposition, thus the proposed architecture can be realized as efficiently as in the Fourier domain. The related simulation results are presented to verify the validity of the theories and methods involved in this paper.