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more on 3G, American Style
From: David Farber <dave () farber net>
Date: Wed, 22 Sep 2004 19:07:59 -0400
Begin forwarded message: From: vijay gill <vgill () vijaygill com> Date: September 22, 2004 6:01:00 PM EDT To: David Farber <dave () farber net> Cc: Ip <ip () v2 listbox com> Subject: Re: [IP] 3G, American Style Allow me to make a few corrections. On Wed, Sep 22, 2004 at 02:28:08PM -0400, David Farber wrote:
By Eric S. Brown September 22, 2004 <http://www.technologyreview.com/articles/04/09/wo_brown092204.asp? trk=nl>barrier, the new 3G sofferings are recognizably broadband. AT&T's service promises 220- to 320-kilobit-per-second Web access, with burst rates of up to 384 kilobits per second. The service is surprisingly inexpensive at $25a month, but it’s available only over $300 3G phones such as the Motorola A845 or Nokia 6651 or on laptops equipped with a $150 add-in card. Verizon's pricier service ($80 per month) offers 300 to 500
This is incorrect. The service for the $150 add-in cards costs $80, same as verizons. The $25/mo plan is only available on the handset. If you tether the handset or put the SIM into a data card, you will be charged extra.
UMTS was meant to blend GSM (Global System for Mobile Communications), the cellular standard that represents about 70 percent of the world’s cell phone users, with CDMA (code division multiple access), which claims about 20 percent of users, mainly in the Americas. Yet two other
UMTS uses techniques commercialized by qualcomm, specifically CDMA. It did not blend either the back end or the air interface between GSM and the CDMA as used in the US (is95, 1x et al). UMTS might more properly be called wideband CDMA.
related, but incompatible variations of CDMA have also survived: the CDMA-2000/Evolution Data Optimized (EV-DO) service being pushed by Verizon and Sprint in the United States, and the Wideband-CDMA based
closer to commercial use. Flash-OFDM is a spread spectrum technology developed by Flarion Technologies that uses a scheme called orthogonal frequency division multiplexing to improve performance by continually seeking out the cleanest possible transmission frequencies, allowing multiple signals to travel over a single path without interfering with
OFDM is used in most peoples new notebooks - .11g utilizes OFDM. OFDM is not exclusive to Flarion. /vijay ------------------------------------- You are subscribed as interesting-people () lists elistx com To manage your subscription, go to http://v2.listbox.com/member/?listname=ip Archives at: http://www.interesting-people.org/archives/interesting-people/
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