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一、什么是WiMAX WiMAX(Worldwide Interoperability for Microwave Access)是定点宽带无线MAN(城域网)技术。WiMAX通常是指IEEE802．16a标准(2GHz～11GHz)。该技术是IEEE(电气电子工程师协会)于2002年4月发布的工作于10GHz至66GHz频段下的IEEE802．16标准的扩展,是针对微波和毫米波频段提出的一种新型空中接口标准。此外,也可以理解为是WiMAX论坛极力推介的IEEE802．16系列标准(目前有802．16a,802．16d,及802．16e等)。 WiMAX研发的目标是打算在MAN范围内提供一种性能可与Cable modem、DSL等基于线缆的宽带接入相竞争的,工作在10GHz到66GHz(现下频段已延伸到2GHz)频段的最后一千米的宽带接入技术。典型的802．16a通常由安装在建筑物上的基站和家庭
First, what is WiMAX (Worldwide Interoperability for Microwave Access) is a fixed-point broadband wireless MAN (Metropolitan Area Network) technology. WiMAX usually refers to the IEEE802.16a standard (2GHz ~ 11GHz). This technology is an extension of the IEEE802.16 standard released by IEEE (Institute of Electrical and Electronics Engineers) in April 2002 and operating in the frequency band of 10GHz to 66GHz. It is a new air interface standard proposed for microwave and millimeter-wave frequency bands. In addition, it can also be understood as the IEEE802.16 series of standards strongly promoted by the WiMAX Forum (there are currently 802.16a, 802.16d, and 802.16e, etc.). The goal of WiMAX R & D is to provide a competency in the MAN range that will compete with cable-based broadband access such as Cable Modem, DSL, operating in the 10 GHz to 66 GHz band (now down to 2 GHz) Meters of broadband access technology. The typical 802.16a is typically installed by the base station and home on the building