ORM-DCSK:一种新型差分移位混沌键控通信方案  

ORM-DCSK: A Novel DCSK Communication Scheme

作　　者：张刚[1] 王传刚[1] 李国权[2] 林金朝[2] Zhang Ganga;Wang Chuangang;Li Guoquan;Lin Jinzhao(Chongqing Key Laboratory of Signal and Information Processing, Chongqing University of Posts and Telecommunications, Chongqing 400065, China;Chongqing Key Laboratory of Photo electronic Information Sensing and Transmitting Technology, Chongqing University of Posts and Telecommunications, Chongqing 400065, China)

机构地区：[1]重庆邮电大学信号与信息处理重庆市重点实验室,重庆400065 [2]重庆邮电大学光电信息感测与传输技术重庆市重点实验室,重庆400065

出　　处：《系统仿真学报》2018年第5期1832-1837,共6页Journal of System Simulation

基　　金：国家自然科学基金(61371164;61301124);重庆市教育委员会科研项目(KJ130524);重庆市杰出青年基金(CSTC2011jjjq40002)

摘　　要：针对RM-DCSK(Reference-Modulated Differential Chaos Shift Keying)算法判决变量中存在信号内干扰和平均比特能量较大的问题,提出ORM-DCSK(RM-DCSK based on the orthogonal chaotic signals)改进型算法。新算法设计了正交混沌信号发生器,产生严格正交的混沌信号,彻底消除信号内干扰;并且拓展了RM-DCSK算法的帧结构,有效降低信号平均比特能量。推导出ORM-DCSK在AWGN信道的误码率公式并进行蒙特卡罗仿真。实验结果表明,相比RM-DCSK算法,ORM-DCSK在不牺牲传输速率的情况下大幅改善了误码性能。To overcome the intra-signal interference components and the large average bit energy existing in decision variables, an improved RM-DCSK algorithm, named ORM-DCSK, is proposed. An orthogonal chaotic generator is designed to eliminate the intra-signal interference components. Besides, the signal frame format is expanded to reduce the average bit energy. The BER is derived and simulated in AWGN channel. The simulation results show that ORM-DCSK performs greatly better in BER performance than RM-DCSK algorithm without sacrificing transmission rate.

关 键 词：混沌通信 参考调制差分混沌键控 正交混沌信号发生器 高斯近似法 

分 类 号：TN911.3[电子电信—通信与信息系统]