混沌理论在光码分多址系统中的性能分析  

Chaos theory in Performance analysis of optical CDMA system

作　　者：李立[1] 冯文果 郭爽[1] 

机构地区：[1]重庆邮电大学移通学院,重庆401520

出　　处：《激光杂志》2016年第11期103-106,共4页Laser Journal

基　　金：国家重大科技专项(2013zx03001004-003)

摘　　要：扩频序列直接影响光码分多址系统的性能,混沌系统是一种复杂的非线性动力学系统,具有对初始值敏感的优点,为了提高光码分多址系统的数据传输正确率,提出了基于改进Chen混沌系统的光码分多址系统。首先对光码分多址系统的特点进行了深入分析,然后采用改进Chen混沌系统产生混沌序列,并将该混沌序列用于光码分多址系统的扩频地址码,最后与其它序列的光码分多址系统的性能进行了对比分析。结果表明,改进Chen混沌系统的光码分多址系统具有较高的抗干扰能力和安全性,比其它序列的光码分多址系统的误差率更低,验证了此系统的可行性和优越性。Spreading sequence directly affects the performance of optical code division muluple access system, chaotic system is a complex nonlinear dynamic system, is sensitive to initial value. In order to improve the accuracy of data transmission in optical code division multiple access system, a optical code division multiple access system based on chaos theory is proposed. Firstly, the characteristics of optical code division multiple access system are analyzed deeply, and then the improved Chen chaotic system is used to generate the chaotic sequence, and chaotic sequence is applied to spread spectrum address code of optical code division multiple access system, in the end, the performance of other optical code division multiple access systems is compared and analyzed. The Results show that optical code division multiple access system in this paper has high anti jamming ability and security and the error rate is lower than other code division multiple access systems, which verifies the feasibility and superiority of the system.

关 键 词：混沌理论 混沌时间序列 光码分多址系统 误码率 保密通信 

分 类 号：TN929[电子电信—通信与信息系统]