Silicon Investor (SI) -- The First Internet Community

STOCKTALK

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor. We ask that you disable ad blocking while on Silicon Investor in the best interests of our community. If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.

Strategies & Market Trends : Gorilla and King Portfolio Candidates -- Ignore unavailable to you. Want to Upgrade?

To: rich evans who wrote (42764)	5/17/2001 8:45:43 PM
From: Uncle Frank	Read Replies (1) \| Respond to of 54805

>> Anyone know if 4G is a CDMA product? Absolutely no one knows, because it is an early concept, not a product. We're probably 10 years away from 4G. uf

To: rich evans who wrote (42764)	5/17/2001 11:40:00 PM
From: Eric L	Respond to of 54805

<< Anyone know if 4G is a CDMA product? >> 4G will probably be a mixed bag of technologies and could include some upgraded CDMA. 4G is currently undefined other than it will provide data transmission rates an order of magnitude above 3G or 3.5G (CDMA 1xEV-DV or WCDMA HSDPA) and will play with an all IP core network. << If not how does this effect Qualcom? >> Potentially (but not necessarily) adversely unless they develop and patent into it. ... but it is really too early to worry about it. 3G mass adoption a couple years away yet. We crawl before we walk. - Eric -

To: rich evans who wrote (42764)	5/18/2001 12:15:43 AM
From: Thomas Mercer-Hursh	Read Replies (2) \| Respond to of 54805

If nothing else, I suspect that 4G in wireless, when we actually get close enough to it to tell, which we aren't, will turn out to be a lot like 4G in computer languages, i.e., so many different things that the G doesn't have much meaning any more. Each generation in computer languages saw an exponential diversification in what was contained within each generation, enough so that even by 3G we had such a wide variety that it is really difficult to see them as all parts of the same stage. Add a G and it is that much worse. Wireless is not nearly as haphazard as computer languages, of course ... funny thing about the need for interoperability ... but, ask yourself, if we get high data rates and semi-universal coverage, what exactly is it that the wireless standard itself is going to add? More likely, the next level is more applications than it is a change in the infrastructure, seems to me, anyway.

To: rich evans who wrote (42764)	5/18/2001 9:14:23 AM
From: JAPG	Respond to of 54805

Rich, The specifications for 4G have not been written or officially discussed by any of the standardization bodies, so nobody knows what 4G will be. However, there are some indications of what type of RF transport technologies may be used, which I guess is what you asked since you mentioned CDMA. RF transport technologies can be dichotomized into: single carrier and multiple carrier. Single carrier transport technologies are: TDMA, CDMA, W-CDMA, GPRS, EDGE, GSM( which is really TDMA) & HDR. Multiple carrier transport technologies are: OFDM (the only one I know). Multiple carrier transport technologies use the spectrum more efficiently than any of the single carrier transport technologies, that is: they can cram more bits per Hertz of the spectrum. If one key objective of 4G is to deliver more bits/sec to users and use the limited spectrum more efficiently, standardization bodies will look very closely to Multiple carrier transport technologies. Present status of OFDM OFDM has had a long gestation period because it is computationally more intensive than any other RF transport technology. Only recently we have seen chips incorporating this technology. OFDM is the transport technology for the IEEE 802.11a standard for broadband WAN, LAN networks in North America and ETSI BRAN HiperLAN/2 in Europe. Note that this is basically for Broadband Fixed wireless access and not for mobile telephony. Products that incorporate these standards are being shipped just now. However, there have been several tests confirming that OFDM can be made mobile and cellular in a short period of time. Thus, some people believe, maybe like Olga Kharif from Business Week, that 3G ---if not delivered in time--- can be skipped altogether and some telcos will go directly to 4G. Some recent references: 1) Microsoft presentation at the OFDM forum, May 10, 2001 ofdm-forum.com 2) FCC document approving the use of the first OFDM device on the 2.4 GHz frequency band, MAY 10, 2001 ofdm-forum.com 3) OFDM now stands as the sole candidate to be considered by the IEEE's 802.11 Working Group as the industry standard for 802.11g products, May 16, 2001 internetnews.com I hope it helps. Take care JAPG