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Technology Stocks : Broadband Wireless Access [WCII, NXLK, WCOM, satellite..] -- Ignore unavailable to you. Want to Upgrade?

To: SteveG who wrote (130)	5/4/1999 1:19:00 AM
From: Bernard Levy	Read Replies (2) \| Respond to of 1860

Hi Steve: I must admit not being quite up to speed on MMDS, but isn't Videotron in the process of rolling out the 2-way MMDS equipment manufactured by CAMP? The main problem for 2-way MMDS is dealing with a frequency reuse factor in the range of 4 to 7, and sectorizing cells to deal with this problem. Sizing up the cells in a scalable manner must also be a major pain. In essence, MMDS cells can be much larger (say up to 15 or 20 miles in radius) than LMDS cells. However, what do you do when you sign more customers? You must find a way of subdividing your cells gracefully, in such a way as to preserve the sectorization patterns you had in place. It is easy to see that the development of a scalable architecture is a major hurdle. On the other hand the basic microwave equipment (antennas, receivers ....) is much cheaper than at LMDS frequencies, except that the antennas need to be much bigger. You are also right in suggesting that MMDS frequencies allow more advanced smart antenna algorithms than LMDS (which remains predominantly a LOS technology). However all these options create difficult tradeoffs when trying to find a good system architecture. I would certainly like to hear what others (transmission, PeterE, Clark Hare) have to say on this issue. Best regards, Bernard Levy