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

To: Peter Ecclesine who wrote (11058)	4/20/2001 3:51:42 AM
From: axial	Read Replies (1) \| Respond to of 12823

Hi, Peter - If I understand correctly, the use of directional antennas, permitting increased gain (ie., greater than 6 dB) can be used, but a 1:1 decrease in transmit power must accompany the additional receive gain. No pun intended, but is there any gain to be achieved in transmit distances using new antenna technologies? Also, if 64 QAM needs a S/N ratio of 9dB, will the error-correction scheme be of any help? Would convolutional or turbo coding give you a greater transmit distance? Is a 2 or 3 dB gain through error-correction "virtual" or real? Has the FCC set up a zero-sum game here, or can new techniques overcome some of the constraints, without defeating their purpose, ie., eliminating interference? Regards, Jim