一、 本程序采用16QAM调制方式，对一串2进制信源进行调制，采用（7，4）循环码对信源做信道编码，用升余弦滚降函数进行基带调制，再调到高频信道；在信道上加入高斯白噪声，运用匹配滤波器解调，画出解调星座图，运用最小欧氏距离译码判决，再对信号进行信道解码，画出采用信道编码技术和不采用信道编码技术的误比特率图。-First, this program uses 16QAM modulation mode, for a string of two binary source is modulated,

THIS FILE DESCRIBE THE CALCULATION OF BIT ERROR RATE (BER) OF A MODULATED SYSTEM AND THE PLOT OF THE BER WITH SIGNAL TO NOISE RATIO (SNR) TO EVALUATE THE SYSTEM BEHAVIOR-THIS FILE DESCRIBE THE CALCULATION OF BIT ERROR RATE (BER) OF A MODULATED SYSTEM

里面包括QPSK编码，8QAM编码下的多种求解信噪比和误码率的曲线(Can plot the signal-to-noise ratio and bit error rate under 8QAM)