MIMO 系统仿真，对时变信道的自适应调制-erq.m : function for ERQ algorithm in MIMO systems space_wf.m : function for spatial domain power waterfilling st_wf.m : function for spatial and temporal domain waterfilling MIMO_rate.m : Plot spectral efficiency vs SNR f

在程序中，任意产生一个mimo的信道矩阵，分别使用注水法和等增益算法求出信道容量。结果得到子信道的功率分配，进行作图。(A channel matrix of MIMO is generated randomly, and the channel capacity is calculated by water filling algorithm and equal gain algorithm respectively. Power allocation of subchannels is o