通过构造一种二维交叉耦合映象格子系统模型,产生二维的混沌伪随机序列。并将此序列作为加密遮掩信号,在通信两端采用参数迭代法实现系统模型的混沌同步,从而实现了保密通信。同时作者对二维系统模型及其伪随机序列进行了一系列时-频分析和随机性测试,取得良好效果。 By constructing a two-dimensional cross-coupled grid lattice model, a two-dimensional chaotic pseudo-random sequence is generated. The sequence is regarded as the encryption obscuring signal, and the chaotic synchronization of the system model is achieved by parametric iteration at both ends of the communication, so as to realize the secure communication. At the same time, the author carried out a series of time-frequency analysis and randomness test on two-dimensional system model and its pseudo-random sequence, and achieved good results.