Worldwide Interoperability for Microwave Access (IEEE 802-16 and ETSI HiperMAN) uses OFDMA modulation over its radio links. The WiMAX Forum describes it as “a standards-based technology enabling the delivery of last-mile wireless broadband access as an alternative to cable and DSL”. Unlike Wi-Fi, this offers symmetrical bandwidth (equal upload and download speeds) over longer ranges of some kilometers with strong encryption (3DES or AES). It connects between network endpoints without line-of-sight of the base station for fixed, portable and mobile wireless broadband. A typical cell radius is 3-10 km, offering up to 40 Mb/s per channel for fixed and portable access, and up to 1 Gb/s for fixed only.

Mobile networks are expected to provide up to 15 Mb/s capacity within a 3 km cell radius. WiMAX technology is incorporated in some mobile devices, allowing urban areas and cities to become MetroZones for portable outdoor broadband wireless access.

See also: OFDMA

Website: www.wimaxforum.org