代码的功能是MIMO系统中多用户基于发送端预编码算法，主要是对ZF预编码与MMSE预编码误码率性能比较-Code function is multi-user MIMO systems pre-coding algorithm based on the sending end, mainly for ZF and MMSE precoding pre-coding BER performance comparison

基于ZF预编码性能 画出不同准则下误码率和信噪比的曲线(Pre coding performance based on ZF)