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利用DPSK调制的混沌通信

发表时间:2011-08-15  浏览量:1441  下载量:642
全部作者: 汪洋,冯野
作者单位: 太原理工大学理学院
摘 要: 基于分布反馈(distributed feedback,DFB)激光器产生的混沌现象,数值模拟了副载波在混沌保密通信系统中的应用研究,提出把差分相移键控(differential phase shift keying, DPSK)调制技术应用于副载波混沌保密通信系统。结果表明:利用DPSK调制技术可有效提高混沌通信系统的性能,并有利于提高信号的隐藏性。将副载波多路复用应用于混沌保密通信系统中,可准确解调出各路信息。当副载波频率接近激光器的弛豫振荡频率时,信息解调的质量会下降。
关 键 词: 光学;保密通信;数值模拟;差分相移键控调制
Title: Chaotic communication with DPSK modulation
Author: WANG Yang, FENG Ye
Organization: College of Science, Taiyuan University of Technology
Abstract: This paper presents a simulation research on subcarrier modulation in chaotic communication based on distributed feedback (DFB) producing chaos, and proposes apply differential phase shift keying (DPSK) modulation in subcarrier chaotic communication. The result shows that the performance of subcarrier chaotic communication can be improved effectively by using DPSK modulation, and it is beneficial to improve the message-hide effect. With subcarrier multiplexing frequency gets close to the relaxation oscillation frequency of the laser diode, the decoding performance would decrease.
Key words: optics; secure communication; simulation; differential phase shift keying modulation
发表期数: 2011年8月第15期
引用格式: 汪洋,冯野. 利用DPSK调制的混沌通信[J]. 中国科技论文在线精品论文,2011,4(15):1371-1375.
 
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