MIMO(Multiple-Input Multiple-Output)技术指在发射端和接收端分别使用多个发射天线和接收天线，使信号通过发射端与接收端的多个天线传送和接收，从而改善通信质量。它能充分利用空间资源，通过多个天线实现多发多收，在不增加频谱资源和天线发射功率的情况下，可以成倍的提高系统信道容量，显示出明显的优势、被视为下一代移动通信的核心技术。(MIMO (multiple-input multiple-output) technology refers to the transmitter and receiver respectively using multiple transmit and receive antennas, the signal transmitted through multiple antenna transmitter and receiver and receiving, so as to improve the quality of communication. It can make full use of space resources, through the multiple antenna, without increasing spectrum resources and antenna transmit power, can improve the system capacity, shows obvious advantages, is regarded as the core technology of the next generation mobile communication.)