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To: Srini who wrote (121291)	7/3/2002 5:09:09 PM
From: Dexter Lives On	Read Replies (3) \| Respond to of 152472

As I've said before, DO and DV are DOA! They are totally outgunned by the newer technologies... both on cost and performance bases. The classic voice vs. data capacity trade-off will be the death of cdma, imho. Rob BTW Just read a recent Samsung paper where they suggest an evolution of 3g (call it 3g++) to 30Mbs - I can assure you that CDMA can't deliver that kind of capacity!!!!

To: Srini who wrote (121291)	7/3/2002 5:29:56 PM
From: quartersawyer	Read Replies (3) \| Respond to of 152472

"We can provide today 1 Megabyte per second 16 times cheaper than EV-DO, which will offer 385 kilobits per second when it's available in two years. ... Our system works at up to 120 m.p.h. with very little loss of quality. We offer a low-cost, pocket-sized, plug-and-pay module," he said during the "Real 3G" panel discussion at the recent Bear, Stearns' "Technology Conference." That statement is made by the guy from IPWireless. They are doing portable wireless with UMTS. They have this to say aboout Flarion and OFDM: "Most technology developers targeting the wireless broadband market are using proprietary OFDM technologies. OFDM systems lack the performance and spectral efficiency advantages of W-CDMA in the challenging NLOS environment. But even more significantly, they lack standards. This is why the focus has shifted to W-CDMA - a sophisticated technology developed in accordance with worldwide standard imperatives." ipwireless.com

To: Srini who wrote (121291)	7/3/2002 11:29:03 PM
From: Clarksterh	Respond to of 152472

"We can provide today 1 Megabyte per second 16 times cheaper than EV-DO, which will offer 385 kilobits per second when it's available in two years. ... Our system works at up to 120 m.p.h. with very little loss of quality." Yeah right! In a cell environment? (e.g. self limiting interference, handoff) Is it ready to roll with all of the bugs worked out? OFDM is a neat technology and it has some true advantages - for instance multipath resolution - but it isn't at all clear to me that it is better at limiting the effects of the neighboring cell any better than CDMA and in some ways it is worse. For instance one of the chief advantages of CDMA cell systems is the ability to avoid the hard task of cell frequency planning, whereas OFDM still requires that. I have read a lot on OFDM and have yet to see anything that would imply a real advantage over CDMA in a cell system. (In a broadcast system like TV, yes, but ...) Way too much hype, not enough facts. Clark

To: Srini who wrote (121291)	7/4/2002 2:27:05 PM
From: Jon Koplik	Read Replies (2) \| Respond to of 152472

EV-DO systems are up and running commercially right now in South Korea. (Plus, I believe there have been demonstration models around San Diego and somewhere in Europe (near Cannes (?)) for at least a year). So, we know whoever made the statement : "when it's available in two years" is a liar. Also, this mention of "385 kilobits per second" also indicates that whoever said this is a (further) liar. Both the average data rate and the peak rate for EV-DO are much faster than 385 kilobits per second. Jon.