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Technology Stocks : Qualcomm Incorporated (QCOM)

QCOM 163.32

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To: Ramus who wrote (18338)	11/15/1998 1:50:00 AM
From: freak.monster1	Read Replies (1) of 152472

cdma2000 vs. W-CDMA: >Thanks for posting this. I'm glad they addressed the spectral >efficiency question(my chip rate is bigger than yours baloney. >I want to point out that not only does the independent Chinese >analysis show that the CDMA2000 forward link is 30% and >reverse link is 19% more spectrally efficient than the UTRA/W-CDMA >proposal. But UTRA/W-CDMA is going to have a hard time fitting the >number of carriers they propose because of guard-band considerations. >In most deployments this will seriously degrade their overall >spectral efficiency. Translation....UTRA/W-CDMA= less >subs/buck...maybe a lot less subs/buck!! All this and they want you >to buy all new physical layer hardware too. Agree with you completely. Have seen some posts here about how W-CDMA was designed ground-up for data and how backward compatibility with IS-95 will hurt the efficiency of the system. As you point out this is complete baloney. One thing that you didn't touch on is the synchronous (IS-95, cdma2000) vs. asynchronous basestations. I have it from someone who has implemented both synchronous as well as the asynchronous basestations, asynchronous basestations are much more complex. Of course, like a lot of W-CDMA, it is an attempt to avoid QCOM IP. Not saying that W-CDMA doesn't have some extremely clever things in it. It clearly does. And one of the 3 fairness principles Qualcomm has stated for convergence, allows for a converged standard which benefits from the innovation of both cdma2000 as well as W-CDMA. For a more detailed view of some of the differences between the standards, and Qualcomm's view of the technical directions for the new converged standard see: qualcomm.com

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