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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: Greg B. who wrote (18327)	11/14/1998 1:42:00 PM
From: Ramus	Read Replies (2) of 152472

Greg, 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. As I've said before, if you don't believe this then go to the referenced ITU link... itu.int and under "Proposals" click on "Proposals submitted by June 30, 1998" you can read the various proposals and decide for yourself. Another thing, in CDMA-2000 the use of 1x and 3x 1.2288mcps carriers is very smart. Not only the implications of upgrade from IS-95 systems but the enhanced versatility to provide a mix of 2G and 3G services as networks mature. No need to dump large cash moving from 2G to 3G. W-CDMA folks will try to have you believe that IS-95 is 2G technology and old hat compared to UTRA/W-CDMA. Reality, IS-95 is 3G technology now doing the 2G job paving the best way to 3G. There is no way that UTRA/W-CDMA is going to be able to match CDMA-2000 in deployment versatility and overall cost efficiency. And I believe that CDMA-2000 and other high speed data services such as IS-95HDR will arrive to market well ahead of the competition. Lastly, the note(3) about spectral efficiency and filtering. Indicates that the UTRA/W-CDMA proposal intends(or will have) to use longer tap filter to meet adjacent channel interference requirements(because of 10% greater chip rate). Thus requiring more computing power=more current drain= less potential battery life/less talk/less standby time= not very smart engineering. The cost of trying to be different? Amazing! Walt

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