激光混沌信号对光纤通信系统攻击方法的理论研究

Theoretical study on laser chaos attacking optical fiber communication systems

把混沌理论应用到电子对抗中,提出混沌信号干扰攻击敌方通信系统以及混沌光攻击光纤通信系统思想方法,提出混沌屏蔽攻击方法和混沌相位攻击方法。混沌屏蔽攻击的物理机制是:强混沌信号可以直接屏蔽信息信号,小混沌信号可通过态叠加原理扰乱信息信号且能增加误码率;混沌相位攻击物理机制是:主要是通过交差相位调制把混沌信号变化特点叠加在信息信号相位上去干扰信息信号。最后数值模拟了对速率2.5 Gbit/s、5 Gbit/s以及25 Gbit/s的波长1.31光纤通信系统的混沌攻击,其攻击效果确实增加了通信系统的解调难度。

Chaos theory is applied to electronic defiance. The approaches of chaos attacking and interfering optical fiber communication systems are proposed. Two methods of chaos masking attacking （CMAT） and chaos phase attacking （CPAT） are presented. In CMAT, the larger chaotic signal can mask straightway message signals and the small chaotic signal can interfere message signals to add bit-error-rate by state superposition principle. In CPAT, the chaotic signal can overprint the phase of the message signals by the cross-phase modulation so that chaos can interfere message signals. At last, optical fiber communication system at wavelength 1.31 for bit rates of 2.5 Gbit/s, 5 Gbit/s and 25 Gbit/s are effectively attacked by CMAT and CPAT in simulations.