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To: 49thMIMOMander who wrote (1390)9/29/2001 11:49:04 AM
From: Eric L  Read Replies (1) | Respond to of 9255
 
re: GSM coverage in North America

<< is there any map on the web on the "whole picture"??
(New Orleans, etc gaps) >>

The best coverage maps are available from "Wireless ScoreKeeper" and use a map-based CD-ROM program. I used to have access to my former companies subscription. They are now owned by Global Information, Inc. (GII).

The North American GSM Alliance & North American GSM Alliance (GSMNA) has this not so detailed one (doesn't show carriers) which is updated through 01/15/01

gsm-pcs.org

Shows some of the holes but we do of course have a lot of desert, mountain, forest, lakes and rivers. Be that as it may, GSM is still building out in the US because of that whole C Block fiasco (and also some of the D/E/F stuff - financing had really dried up for these carriers - timing is everything).

Another issue regarding GSM buildouts in the US was that the carriers with big bucks and name brand, for the most part selected IS-136 TDMA or IS-95 CDMA for digital buildouts (BellSouth an exception and to some degree PacBell which spun from an RBOC).

SprintPCS (big winner in C-Block) was really pivotal in this. The decision between GSM or CDMA for them was purely a financing decision. I suspect Ericsson regrets not coughing up the financing. Nortel with both CDMA and GSM1900 wanted to see CDMA get a start - same with Motorola and of course AT&T (now Lucent) was pushing heavy for CDMA. Nokia couldn't play because they didn't have PCS1900 (GSM1900) infra back then.

- Eric -



To: 49thMIMOMander who wrote (1390)9/29/2001 12:09:41 PM
From: Eric L  Respond to of 9255
 
re: EDGE When & How

I'm a bit nervous about the comments attributed to John Byrne of Nokia by John Hoffman re Nokia EDGE terminal time frames:

Message 16216878

Any idea who John Byrne is?

I have a very interesting 1.2 MB PowerPoint 20 slide presentation called "The Performance & Cost Balance for EDGE Terminals" by TTPCom Ltd on file.

I can't find the original link (which I think is burried somewhere on the UWCC site). I'd be delighted to e-mail it to anyone that PM's their e-mail address to me.

It starts out:

>> THE CHALLENGE

* are you afraid that EDGE will be the "new GPRS"?
- huge claims followed by even bigger delays
- relax! EDGE will be different...
- it’s a matter of DIFFICULTY, rather than COMPLEXITY
- in GPRS everything was new, here we’re highly focused on one thing: the modem <<

It states (in re the Radio) that the "most challenging aspect is linearity of modulation"

After discussing DSP Procssing Requirements it states:

>> DSP SUMMARRY

* "there’s no such thing as a free lunch"

- you just have to decide how you’d like to pay for your meal!
- you can’t get more bits down the same radio channel without paying

* we pay in algorithmic complexity realised in (1) greater DSP power (2) more memory (3) increased silicon size / complexity (4) higher power consumption <<

- Eric -



To: 49thMIMOMander who wrote (1390)9/29/2001 6:21:14 PM
From: Eric L  Read Replies (1) | Respond to of 9255
 
re: prions

fair doze of angloamerican free market prions??

Man, I had to look that one up!

>> prion (pre'on) n.

A microscopic protein particle similar to a virus but lacking nucleic acid, thought to be the infectious agent responsible for scrapie and certain other degenerative diseases of the nervous system. <<

- Eric -