文章详细阐述了数字通信系统中BER仿真的方法与步骤，给出了从发射机——信道——接收机整个过程的信号传输模拟的matlab实现方法，特别给出了高斯噪声的叠加方法，Eb/N0的计算与表述及误比特率的统计等，介绍了相应的matlab库函数，是一篇通信仿真入门的好文章。 -The article elaborated on the digital communication system BER simulation methods and steps, are given from the transmitter- channel- receiver of the process of matlab simulation of signal transmission method, especially given the superposition method of Gaussian noise, Calculation and expression Eb/N0 and BER statistics and so on, to introduce the corresponding matlab library function, is a good entry-communications simulation article.