摘要
提出混沌通信中继器设想,建立半导体激光器激光混沌全光中继器物理模型,理论证明了激光混沌中继器系统的同步.数值实现了发射系统、中继器系统、接收系统的混沌同步,分析了系统反馈系数和同步误差以及同步时间的关系.模拟了中继器系统在激光混沌保密通信中的应用,分别给出了具有正弦信号调制频率0·2GHz和数字信号0·2Gb/s速率的混沌通信以及同步误差分析,表明混沌中继器系统确能改善和提高激光混沌通信的解码质量.分析了中继器系统的带宽和20Gb/s高速率数字信号混沌通信以及同步误差,给出了具有正弦信号调制频率0·1—20GHz以及调制速率0·1—20Gb/s带宽的数值结果以及同步误差和调制频率的数值关系,还数值分析了系统的参数失配.
The chaotic repeater is proposed for long-baul chaotic communications. The physical model of all optical chaotic semiconductor laser repeater is presented. The synchronization of chaos repeater system is theoretically demonstrated. Chaos synchronization of a transmitter, a repeater and a recoverer is numerically achieved. Relationships of synchronization error and synchronization time with the system feedback coefficient are analyzed. Application of the repeater system is numerically simulated in chaotic laser communications. Chaotic communications and synchronization error analysis with a sinusoidal modulation signal of frequency 0.2 GHz and a digital signal of 0.2 Gb/s rate are given respectively to illustrate that chaotic repeater can improve the decoding quality in chaotic laser communications. The repeater bandwidth, chaotic communications with a high rate digital signal of 20 Gb/s and synchronization＇ error are analyzed respectively. Numerical results of a sinusoidal modulation signal of bandwidth from 0.1 to 20 GHz, and a digital signal of modulation bandwidth from 0.1 to 20 Gb/s are obtained, and numerical relationship of synchronization error to the modulation frequency is also shown. The system parameter mismatch is also numerically analyzed.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第4期1687-1695,共9页
Acta Physica Sinica
关键词
混沌
同步
激光器
中继器
chaos, synchronization, laser, repeater
