调频相关延迟差分混沌键控的通信模型及性能  

Communication model and performance of frequency modulation correlated delay differential chaos shift keying

作　　者：王娟[1,2] 张爽[2] 甄春阳 丁群[1] Wang Juan Zhang Shuang Zhen Chunyang Ding Qun(Electronic Engineering Institute, Heilongjiang University, Harbin 150001, China School of Electronics ＆ Information Engineering, Heilongjiang University of Science ＆ Technology, Harbin 150022, China)

机构地区：[1]黑龙江大学电子工程学院,哈尔滨150001 [2]黑龙江科技大学电子与信息工程学院,哈尔滨150022

出　　处：《黑龙江科技大学学报》2016年第5期581-585,共5页Journal of Heilongjiang University of Science And Technology

基　　金：国家自然科学基金项目(61471158);教育部高等学校博士学科点专项科研基金项目(20132301110004)

摘　　要：针对现有差分混沌键控数据传输速率低、误码率高、保密性差的问题,结合调频差分混沌键控FM-DCSK和相关延迟差分混沌键控CD-DCSK,提出一种新型的调频相关延迟差分混沌键控FM-CD-DCSK通信方法,通过频率调制使信息比特能量恒定,利用相关延迟可同时传输2位信息。结果表明:在扩频因子、信噪比和信号干扰比相同的情况下,FM-CD-DCSK的通信性能明显优于FM-DCSK和CD-DCSK。对于不同的信噪比,选择合理的扩频因子,能够实现该通信方案的最优性能。This paper introduces a novel frequency modulation correlated delay differential chaos shift keying FM-CD-DCSK a combination of the frequency modulation differential chaos shift keying FM-DCSK and correlated delay differential chaos shift keying CD-DCSK,as an alternative to the existing differential chaos shift keying which suffers from a lower data transmission rate,a higher bit error rate,and a poor confidentiality. This FM-CD-DCSK enables the constant information bit energy by frequency modulation and the simultaneous transmission of 2 bits of information using the relevant delay. The simulation demonstrates that,given the same spread spectrum factors,signal to noise ratio,and signal to interference ratio,FM-CD-DCSK features a significantly better communication performance than both FM-DCSK and CDDCSK; and the selection of reasonable spread spectrum factor for different signal-to- noise ratios can provide an optimal performance of FM-CD-DCSK.

关 键 词：数字保密通信 混沌键控 调频相关延迟差分混沌键控 

分 类 号：TN918[电子电信—通信与信息系统]