Fractional Fourier Transform Based M-ary Chirp Modulation  

作　　者：SHA Jiajun ZHENG Guoxin YANG Lin 沙嘉俊;郑国莘;杨柳(Key Laboratory of Specialty Fiber Optics and Optical Access Networks,Joint Internat ional Research Laboratory of Specialty Fiber Optics and Advanced Communication,Shanghai Institute of Advanced Communication and Data Science,Shanghai University,Shanghai 200072,China;School of Electronic and Information,Shanghai Dianji University,Shanghai 201306,China)

机构地区：[1]Key Laboratory of Specialty Fiber Optics and Optical Access Networks,Joint Internat ional Research Laboratory of Specialty Fiber Optics and Advanced Communication,Shanghai Institute of Advanced Communication and Data Science,Shanghai University,Shanghai 200072,China [2]School of Electronic and Information,Shanghai Dianji University,Shanghai 201306,China

出　　处：《Journal of Shanghai Jiaotong university(Science)》2020年第6期795-801,共7页上海交通大学学报（英文版）

基　　金：the National Natural Science Founda-tion of China(No.61571282);the Open Project Program of the State Key Laboratory of Rail Traffic Control and Safety(No.RCS2017K012)。

摘　　要：In this paper,a novel M-ary chirp modulation scheme is proposed on the basis of the energy concen-tration property of chirp signals in fractional domain.In the proposed scheme,chirp signals with diferent phases are multiplexed in the same time frequency bandwidth through reverse chirp rate to increase information rate.In addition,fractional filters based on fractional Fourier transform(FRFT)are designed to separate chirp signals of diferent chirp-rates in the receiver.Moreover,the theoretical performance of fractional filters and the error probability of M-ary chirp system are derived.Both theoretical analysis and simulation prove that the proposed scheme outperforms M-ary quadrature amplitude modulation(QAM)system in the anti-noise performance.

关 键 词：chirp modulation fractional Fourier transform(FRFT)filter M-ary chirp 

分 类 号：TN911[电子电信—通信与信息系统]