电讯技术2017，Vol.57Issue(4)：397-401,5.DOI:10.3969/j.issn.1001-893x.2017.04.005
一种利用线性调频信号的新型扩频调制技术
A New Spread Spectrum Modulation Technology Based on LFM Signal
摘要
Abstract
According to the characteristics of the up-chirp and down-chirp linear frequency modulation(LFM) signal,a new spread spectrum technology called Cyclic-Shift Chirp Spread Spectrum(CS-CSS) combing with the Chirp spread spectrum(CSS) and the Cyclic Code-Shift Keying(CCSK) is proposed to solve the problem of low modulation efficiency,low bit error rate(BER) performance and complex implementation in traditional ultra-wide band(UWB) wireless communication systems.Firstly,the input data is mapped on the Cyclic-Shift Factor(CSF).Then,cyclic shift is performed for the Chirp signal collected from baseband and produced by CSF value to realize modulation.Finally,by adding window function processing and fast Fourier transform(FFT) the CSF matching with the transmitter is obtained and the original data is produced.Because the BER-SNR performance between theoretical analysis and simulation is matched,in the perspective of modulation efficiency and BER performance,the proposed scheme has a BER performance over 10 dB compared with Chirp Binary Orthogonal Keying(Chirp BOK) system.In conclusion,it has better BER performance,higher modulation efficiency and easy implementation.关键词
超宽带通信/线性调频信号/Chirp扩频调制效率/循环移位编码Key words
ultra-wide band communication/linear frequency modulation signal/Chirp spread spectrum modulation efficiency/cyclic code shift keying分类
信息技术与安全科学引用本文复制引用
吴进,孔辉..一种利用线性调频信号的新型扩频调制技术[J].电讯技术,2017,57(4):397-401,5.基金项目
国家自然科学基金资助项目(61272120) （61272120）
陕西省科技统筹项目(2016KTZDGY02-04-02) （2016KTZDGY02-04-02）
