一个2*2的mimo系统，发射端采用分层空时的VBLAST编码，信道为瑞利衰落加高斯百噪声，接收端采用zf接收，得到完美曲线。-A 2* 2 MIMO system, the transmitter using the VBLAST layered space-time coding, Rayleigh fading channel for the hundred plus Gaussian noise, the receiver using zf reception, perfect curv