Date: Mon, 21 Apr 2003 13:19:07 +0200 From: "Mark Gerritsma" <nl.autonopsamtmfweb.nld> Subject: Re: GM to increase SAAB lineup
B&D <NO_SPAMnopsamCOM> schreef: > I am confused: > GSM and CDMA have nothing to do with one another except they are both > standards that are used in second generation phone standards. CDMA > is a code based standard based upon military technology (spread > spectrum, resembled broad band noise) and was developed by Qualcomm > in San Diego. GSM is a time based system that was developed in > Europe, and does not use the same technology as Qualcomm, it > resembles pulsed FM signals. I know that technology of the two standards differ. CDMA is more modern then GSM is, which is not surprising because it was developed later (for commercial use at least). As I understand it part of the CDMA technology is/will be incorporated in the UMTS standard to increase bandwidth. At the time I developed software for Ericsson DECT-systems, I knew all the ins and outs, but now I sometimes get lost in all the different abbreviations and which technologies are related and which aren't. > The main wireless providers in the US, are mostly GSM or will be GSM > shortly: AT&T, Cingular, T-Mobile > > CDMA is used by Verizon and Sprint. Do you have just one foreign provider (T-mobile)? In Holland of the 5 providers only two (and one off them only starting this week) are of dutch origins. The other three have English, German and French roots. I actually didn't expect GSM to be so big in the US, considering they have their own standard with CDMA. CDMA as I understand it, is technologically superior to GSM. That on the other hand is not a guarantee for success. Even though Betamax and Video2000 were both better than VHS, it was VHS that succeeded in the end. > Europe which is almost pure GSM, will migrate to EDGE, then UMTS. > Timing will depend upon the solvency of the wireless telecoms firms > there. EDGE doesn't ring any bells for me. Is this another name for GPRS? Because this technology, that is already in use here, was presented as the intermediate step. Mark
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