信号调制延时光反馈混沌系统的多路复用通信

为了研究信号调制延时的光反馈与光注入半导体激光器激光混沌系统的多路复用通信,采用数值仿真的方法,通过支路用户信号对相应支路延时进行调制实现对信号的编码,然后利用混沌同步和互相关检测进行解码,成功实现了3个用户1Gbit/s信号的复用与解复用,分析了有效解码的条件及产生误码的主要原因。这一结果对于探讨用户数量更多、传输速率更快的混沌复用通信是有帮助的。

Multiplexed communication based on a chaotic system with multiple signal-modulation delay optical feedback

To investigate the multiplexed communication in a chaos system with semiconductors subject to optical feedback and optical injection where delays are modulated by signals, the encryption is realized through modulating the channel delay with the corresponding user's signal and the decryption is implemented utilizing chaos synchronization and cross correlation measurement by numerical simulation. The multiplexing and de-multiplexing of three user's signals of 1Gbit/s were realized. Also, the conditions for efficient decryption and the main factors affecting bit error were analyzed.