Broadband Wireless Access [WCII, NXLK, WCOM, satellite..] Message Board

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Technology Stocks : Broadband Wireless Access [WCII, NXLK, WCOM, satellite..]

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To: Bernard Levy who wrote (171)	5/10/1999 2:15:00 AM
From: SteveG	Read Replies (1) of 1860

<..I am also impressed by a) the dynamic selection of modulation order based on RF link quality,..> I know you have written here on this before, but is "shifting" from QPSK (QAM4?) to QAM16 to QAM64 as simple (electronically) as rate adaptation? Is it just the barriers in getting QAM64 efficiencies to work that holds this up, or is this ability in a single radio a) quite a feat or b) easy if you just throw enough electronics at it? <..b) the dynamic allocation of BW to the downstream and upstream links..> Paradyne's MVP proprietary DSL solution claims to do this. Could you explain why this is remarkable - what are the major barriers to having directional dynamic bandwidth allocation (in radio and over copper/other physical mediums)? <..Someone will probably try to buy it before...> Maybe Cisco <g>? And maybe Cisco would have interest in P-COM (which I understand has an OC3 radio with Seimens apparently in trials), which would also tie CSCO to Siemens.... hmmmm..... Thanks as always for your expertise, Bernard (and congrats on your SPDE/CVUS short).

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