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WiMax Landscape Taking Shape
geekee writes "A front page article in EETimes describes some of the goals, as well as some of the issues, involved in WiMax (802.16a) development. The main goal is to deliver 74Mb/s up to 50 km. One big issue is the tighter specs required when compared with WiFi. "It's a big train wreck, and much more complicated than 802.11a design, especially in terms of dynamic range, spectral range and phase noise in RF," said Colin Howlett, a senior RF engineer at VCom Inc. There are at least 4 known companies working on the RF portion and 4 known companies working on the baseband processing. These companies include Intel, Fujitsu, and Maxim. Another issue is in getting governments to agree on regulation standards for the systems, particularly in the 2.5, 3.5, and 5.8 GHz bands, Inconsistancies exist in the requirements for dynamic frequency selection and transmit power control, as well as spectrum allocation. Cost is also an important factor, since WiMax is positioning itself as an alternative to DSL and Cable, and therefore, companies must be able to offer competitve prices to gain market share."
Here is another good article on Wimax.
WiMax is not a replacement for WiFi, it's a backbone protocol for long-haul RF connections. It'll take place on licensed bandwidth which will be illegal to try to jam, as opposed to WiFi where there's nothing stoping your neighbor from using the same frequencies...