此为通信matlab仿真平台 simulink仿真模型，包括中频传输 基带解调 载波同步 多相滤波 和NCO的大系统-This is the communication matlab simulation model simulink simulation platform, including the transmission base-band demodulator IF carrier synchronization of multi-phase filtering and large-

用simulink搭建的一个简单，但是含有上下变频的QPSK基带传输系统-Simulink built with a simple, but with the upper and lower baseband frequency for QPSK transmission system

最简单的基带传输系统用MATLAB仿真，并且计算误码率BER，程序比较简单，适合初学者-Simple baseband transmission system simulation using MATLAB, and calculate the error rate BER, the procedure is relatively simple, suitable for beginners

数字基带传输系统 代码 眼图 误码率 a=0.5 tao=Ts/2 phi=0。信噪比15，采样偏差0，滚余弦系数0.5，占空比0.5，-Digital baseband transmission system bit error rate of the code eye diagram a = 0.5 Tao = Ts/2 phi = 0. Signal-to-noise ratio 15, the sampling deviation, roll cosine coefficient