基于混沌序列的保密通信方法

The Method of Secure Communication Based on Chaotic Sequence

混沌模拟通信在抗干扰和抗破译方面存在混沌同步不稳固、混沌信号通过神经网络重构出来容易破译、被高斯噪声和多径干扰损害后不易滤除等困难。针对上述问题，提出基于混沌序列的保密通信方法即混沌编码通信方法和混沌跳频通信方法，改变了混沌信号用作噪声的思路，把混沌特性用于混沌序列中，从而使混沌通信系统的抗干扰能力和抗破译能力大大增强，可实现ＣＤＭＡ通信，具有可靠性高和易于实现等优点。

There are some difficult problems in the chaotic analog communication,including the unsteady synchronization with the separate chaotic system,the easy reconstruction by neural network for chaos signals,the difficulty in extracting the signal from the disturbance of Gaussian noise and the interfere of the multipath.These problems undercut the effect of the antijamming and security of the communication.In this paper,the two methods of the chaotic coding communication are discussed in accordance with the steadiness of synchronism of the chaotic system and the problem of chaotic analog communication.The method can be used in CDMA system.The proposed scheme provides a simple but effective method for encoding and masking by means of chaotic signals.