文章主要技术要点： 广播，自由，干扰度，MIMO技术，多址接入，迫零算法-The main technical points of the article:Broadcast, Degrees of Freedom, Interference, MIMO, Multiple Access, Zero Forcing

非常有用的文档，详细讲述绿色通信SURVEY以及一种迫零预编码方案ZFBF，并伴有其中的仿真结果-A very useful document, described in detail and an green communications SURVEY zero forcing precoding scheme ZFBF, and accompanied by one of the simulation results