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Technology Stocks : Nokia (NOK)

NOK 6.980

+1.0%

3:03 PM EST

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To: Eric L who wrote (19409)	4/8/2002 5:01:04 PM
From: slacker711	Read Replies (3) of 34857

hoping it won't be one more of those cdmaOne is REALLY 5x GSM fantasies. While I dont think that anybody is ever going to agree on the exact efficiency of CDMA over GSM, I think I can see how IJ gets to 5x GSM (or at least close). I've probably been reading these threads since about the beginning of '98, and my understanding has always been that CDMA was 6-9x more spectrally efficient than AMPS. The GSM-TDMA family was estimated to be 3-4x AMPS. However, looking back....the 6-9x estimate was BEFORE the implementation of EVRC by the US operators (it may have been implemented in Korea). I think that EVRC was supposed to give something like a 60% capacity increase. If you take the high-end of the estimate for CDMA spectral efficiency (9x) and the low-end for GSM (3x), the EVRC version of CDMA would be 4.8x more spectrally efficient than GSM. Has GSM instituted any new CODEC's since '98? I have no idea if AMR is the first new codec since the original GSM implementations. Slacker

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