用Matlab进行BPSK系统发送、接收端的仿真，含有发送端、AWGN信道、匹配滤波、下采样、解调、计算不同信噪比下的误码率，并绘制BER曲线-Matlab simulation of BPSK receiving system，including AWGN channel, match filter, down sample,demodulation and BER calculation

MATLAB实现数字下变频，低通滤波法，写的不错，拿来分享 ( MATLAB implementation of digital down conversion, low pass filtering method, write good, used to share )(MATLAB digital down conversion and match filtering experiment)