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Technology Stocks : CellularVision (CVUS): 2-way LMDS wireless cable. -- Ignore unavailable to you. Want to Upgrade?

To: EdR who wrote (1106)	2/13/1998 11:18:00 AM
From: JW@KSC	Read Replies (1) \| Respond to of 2063

Wireless Wonder Or Broadband Bust? At first this story seemed like the typical LMDS plain jane, Though it gets better, and provides some new info. Here are a few pieces. JW@KSC Local Multipoint Distribution Service: Wireless Wonder Or Broadband Bust? (02/11/98; 1:46 p.m. EST) By George Leopold and Brian Santo, EE Times (snip) "False starts" At First Companies that intend to compete in the market are hesitant to promise too much too fast. The big picture "will not be clear until 1999," said Richard Sfeir, director of marketing for CommQuest Technologies, in Encinitas, Calif. "Realistically, 1998 is a year of definition and positioning, and there will be many false starts. But next year, we will get a much better picture of what LMDS is and what it's useful for." Despite that prediction, CommQuest, a small developer of satellite and cellular chip sets, is already defining LMDS products with one partner, whose experience in antenna arrays would be paired with CommQuest's expertise in baseband and RF components. The pair is working on an LMDS system that will use Spatial Division Multiple Access technology. The combination of antenna arrays and SDMA will create an LMDS system that uses the smallest possible end-user antennas, Sfeir said. First products based on the cooperation could become available before the end of the year. The company is also developing LMDS products independent of this partnership. (snip) Solutions to get around "rain fade" are also in hand. Microwaves, instead of continuing to travel when it rains, interact with raindrops -- they actually heat the water. This has led engineers to permanently ratchet up the power for some transmitters to compensate. Another design calls for antennas with sensors that detect rain; when it does rain, power is boosted until the downpour stops. Subscribers of the one commercial LMDS system operating in the United States -- CellularVision's in the Brighton Beach neighborhood of Manhattan -- have reported on various Usenet groups that their service comes in well, even during adverse weather conditions. After the LMDS spectrum auction, CellularVision may still be the only service provider catering to residential customers. HP's Gray said LMDS licensees will initially target small and medium-sized business in areas with few propagation problems or restrictions on antenna heights. FULL TEXT techweb.com