Excellent story explaing 802.11n and Ultra-Wide Band (UWB)
Full article at: NE Asia Online 2005 Oct : 802.11n or UWB?: "802.11n or UWB? Two major candidates are competing to become the wireless interface destined to feature in home digital equipment: IEEE802.11n, and Ultra-WideBand (UWB).
The day is coming fast when home digital equipment will have wireless interfaces, implementing wireless transmission of high-definition television (HDTV) imagery and high-speed swapping of still pictures and audio content with portable gear.
There are two major candidates for the wireless interface: 802.11n, a next-generation wireless local area network (LAN) built on spatial multiplexing using multiple-input, multiple-output (MIMO) technology, and Ultra-WideBand (UWB) wireless technology using ultra-wideband technologies such as Wireless Universal Serial Bus (USB). 11n offers a long range of up to 200m, and is viewed as the most likely contender for the home network backbone. UWB, on the other hand, is likely to make best use of its low-power, high-speed operation in short-range equipment interconnect, such as personal computers (PC) and portable equipment.
At present both 11n and UWB are being supported as industry standards by multiple groups in competition with each other, with no clear victor in sight. In 11n, the TGn Sync industry body primarily composed of home appliance manufacturers is in collision with the World-Wide Spectrum Efficiency (WWiSE) group, comprised of mostly wireless LAN chip manufacturers, wireless LAN vendors and similar firms. In UWB the situation is similar, with the DS-UWB scheme based on direct-sequence spread-spectrum technology competing with Wireless USB using multiband orthogonal frequency division multiplexing (OFDM) for the position of 'standard technology'. Equipment manufacturers have assumed the technologies would continue to coexist, watching and waiting to see if one falls by the wayside."