In order to improve coverage and reliability of the WiMAX system, the IEEE 802.16 standard supports multiple antenna techniques such as Alamouti Space-time Coding (STC), Adaptive Antenna System (AAS) and Multiple Input Multiple Output (MIMO).

• 为了增加覆盖范围和系统的可靠性；IEEE802.；16标准支持Alamouti方案的空时码(STC)、自适应天线(AAS)和多输入多输出(MIMO)技术在内的多天线技术。