说明：  西蒙赫金编写的通信系统教程，内容较为丰富，适合本科高年级或研究生学习，内含习题及答案，以及部分仿真波形
(The book of Simon Haykin, Communication Systems 4th edition,including the examples and exercises and the answer,some simulations are given at the end of this book, which is suitable for high grade undergraduates and master)