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Technology Stocks : LAST MILE TECHNOLOGIES - Let's Discuss Them Here -- Ignore unavailable to you. Want to Upgrade?

To: Dan S. who wrote (1625)	7/21/1998 3:09:00 PM
From: Bernard Levy	Read Replies (1) \| Respond to of 12823

Hi Dan: Having done some back of the envelope comparisons between LMDS and MMDS in the past, I have a few questions concerning your MMDS system: a) What is your frequency reuse factor? What kind of modulation do you use for the downlink (64-QAM?) You mentioned that you have a capacity of 6Gb/sec per cell. How could this be? MMDS operators have 100MHz of spectrum. Using 64-QAM, I arrive at 600Mb/sec (assuming a frequency reuse factor of 1, which is not possible). Do you use antenna sectorization? (I still don't see how you could have the extremely fine sectorizaton needed). b) What is the size of the antennas needed for your subscribers? What is a rough approximation for the CPE cost? c) What is the architecture for the return link (I understand you still need FCC approval for 2-way)? What modulation do you use (QPSK?) Who manufactures 2-way MMDS equipment? d) Like most MMDS service providers, you seem to be advertising the size of the cell (by comparison with LMDS). This is fine for broadcasting purposes, but larger cells mean also more customers per cell, so that the BW for each customer may not be too large. So if you are really successful, won't you be BW constrained? Best regards, Bernard Levy