摘要
提出了一种基于电光调制器的非线性光电延时反馈超混沌复用通信系统.与传统混沌通信系统不同,其混沌波形不是由激光器产生,而是由电光调制器产生,该系统具有非线性维数高、易于再生和精确控制的优势.介绍了信号调制反馈延时的编码方法和相关检测解码方法,数值仿真了三条支路的高速复用与解复用,分析了误码产生的主要原因,并进一步研究了光纤传输特性对该混沌复用通信系统的影响.结果表明:只要采用相应的增益补偿方案,光纤信道对混沌同步的影响会大大减小,系统能够成功解码原始信号.
A hyper dimensional multiplexed chaos communication system was proposed based on nonlinear delayed feedbacks of electrooptical modulator.Different from traditional chaos communication system,the chaotic waveform is not produced by the semiconductor but by the electro-optical modulator.The scheme is advantageous of high nonlinear dimension,easily reproduced and manipulated accurately.The encryption method of signals modulating feedback delays and cross-correlation decryption method were illustrated.High rates of multiplexing and demultiplexing were numerically simulated for three channels.The main factor for error bit rate was analyzed.The influence of optical fiber on the multiplexed chaos communication system was further investigated.The research results indicate that the influence of optical fiber on chaos synchronization can be reduced significantly and the original signals can be recovered successfully as long as corresponding gain compensation schemes are adopted.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2011年第1期55-60,共6页
Acta Photonica Sinica
基金
上海市教委科研创新项目(No.09YZ223)
上海市研究生创新基金(No.JWCXSL0901)资助
关键词
复用通信
混沌同步
信号调制
延时反馈
Multiplexed communication
Chaos synchronization
Signal modulating
Delayed feedback
