说明：  本代码演示了将一个由非线性映射所产生的混沌序列作为载波，将待发送的有用信号(数字信号)作为调制信号，对非线性映射的某一参数在其混沌区域内进行调制的过程。另外，还有logistic相关代码
(This code demonstrates a chaotic sequence generated by the nonlinear mapping as a carrier, will be sent a useful signal (digital signal) as the modulation signal, a nonlinear mapping parameters in the chaotic region is modulatedprocess.In addition, there are logistic related code)