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Technology Stocks : Qualcomm Incorporated (QCOM)

QCOM 159.59

-3.9%

Nov 20 3:59 PM EST

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To: Brian who wrote (37852)	8/9/1999 7:33:00 PM
From: qdog	Read Replies (1) of 152472

IS that a fact or a bit of wishful cheerleading? The reason I ask that, with it being only 500 MHz difference and the fact that at the present configuration of the systems deployed, you are correct to a degree. I've defracted <2GHz microwave signals and quite successfully, so successfully it almost got be kicked off a project. Seemed I upstaged a MIT/STANFORD/HAVARD multiple degree engineer who opted to go the more coventional wisdom method via back to back passive repeater. The difference was 20db of S/N and fade margin improvement. Done the same in the 4 and 6 Ghz ranges as well. My other point, when Primeco first deployed the system in Houston, there was places, such as my home that you couldn't use the phone indoors. That tower was less than a mile away. They've added a tower that is now <1000 yards away (sorry, not a great judge of distance without maps and the such) and the coverage is just find. IF I build a similar system,with a antenna system radiating the same at 2.4 GHz, then I have the same use as I do at 1.9 GHz. A bigwall or steel wall has no frequency wavelength properties that I recognize. Also your argument is the same that the cellular industry yapped a few years back in pooh-pooh PCS. It more a property of antenna proximity. If I reverse it and use a single antenna P-MP system with range of 30 miles, then I'll not get penetration rates even with 800 MHz. The free space loss is not that great between the two signals. Hell 100 MHz FM antenna's with their megawatt outputs still need an indoor antenna for reliable stereo reception even though you are only 10 miles or less away.

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