IEEE802.16e OFDMA系统中DOA的估计

智能天线是IEEE802.16e协议中规定的下一代无线空口中的关键技术.而 DOA估计是实现智能天线的关键技术.以往的DOA估计技术受到多种限制,不方便应用到下一代无线通迅中.依据协议中给AAS分配的资源,本文提出了序列差分法,介绍了这种方法的原理和计算流程,仿真了这种方法的分辨率和均方差,并和经典的MUSIC算法做了比较.这种方法不受多种限制可以很方便的应用到下一代无线通讯中,并且具有复杂度低,估计精度高等特点.

Estimation of DOA in IEEE802.16e OFDMA system

Intelligent antenna is a popular technology in IEEE802.16e. Direction of Arrival (DOA) Estimation is key point of realizing this technology. The existing technology of DOA is inconvenient in the application of the wireless communication of next generation. This paper put forward a serial difference method according to the AAS resource distribution in protocol. We introduced the principle and calculation flow of the method, simulated the resolution and deviation, and compared it with the MUSIC arithmetic. Testing results show that this method is free of sorts of limitations and can be easily used into the next generation wireless communication system with low complexity and high precision.