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.
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)
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)。
