Chirp信号与连续载波信号的多路复用传输  

Multiplex Transmission of Chirp Signals and Continuous Carrier Signals

作　　者：温容慧[1] 沙学军[1] 郭佩[1] 

机构地区：[1]哈尔滨工业大学电子与信息工程学院,黑龙江哈尔滨150001

出　　处：《华南理工大学学报（自然科学版）》2009年第10期16-19,24,共5页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家"973"计划项目(2007CB310606)

摘　　要：利用余弦信号和Chirp信号在频域、分数阶傅里叶域的优良能量聚集特性,设计了一种频带复用的通信系统.该系统在相同频带内同时传输多路分别以Chirp信号和余弦信号为载波的二相相移键控(BPSK)信号,通过在接收端进行相应阶的分数阶傅里叶变换,使载波信号达到最优能量聚集,进而通过分数阶域滤波将集中于某一窄带内的载波信号滤出,再反变换到时域完成解调过程.仿真分析表明,与添加余弦信号的系统相比,该方法有更好的抗干扰性能.Based on the excellent energy concentration performance of cosine and Chirp signals in the frequency domain and the fractional Fourier transform （FrFT） domain, a communication system for frequency band reuse is designed. This system transmits multiplex BPSK signals respectively with cosine and Chirp signals as carriers within the same bandwidth, and performs the corresponding FrFY in the receiver to concentrate energies right around the peak of output. Moreover, the carrier signals in a narrowband are filtered in the FrFT domain, and are then demodulated in the time domain after an inverse FrFT. Simulated results show that the proposed system is of better antiinterference performance, as compared with the system only using cosine signals.

关 键 词：频带复用 分数阶傅里叶变换 载波信号 CHIRP信号 

分 类 号：TN911.3[电子电信—通信与信息系统]