[opendtv] Re: New iPhone antenna has same 'death grip'
- From: "Manfredi, Albert E" <albert.e.manfredi@xxxxxxxxxx>
- To: "opendtv@xxxxxxxxxxxxx" <opendtv@xxxxxxxxxxxxx>
- Date: Tue, 8 Feb 2011 20:18:58 -0600
Mark Aitken wrote:
> For reference...
http://en.wikipedia.org/wiki/List_of_United_States_wireless_communications_service_providers
Yes, perhaps, but it is just this type of reference that creates the confusion
among the innocent.
Whenever you see GPRS and EDGE, you are talking 2.5G, not 3G.
By the same token, whenever you see HSPA or UMTS mentioned, they are talking
about W-CDMA, even if they don't say so explicitly.
The differences between cdma2000 schemes of Verizon and the "other" W-CDMA
schemes are essentially trivial. Slight differences in chip rates, slight
differences in RF channel widths. Although cdma2000 can aggregate up from 1.25
MHz channel chunks, and I think the AT&T scheme goes up from 5 MHz channels and
no less than that.
In terms of modulation, it's all W-CDMA. GSM is a SERVICE, not a modulation
scheme. I don't see anything that supports the notion that the antennas can be
very different, aside from possibly the frequency bands Verizon and AT&T use
for 3G.
Bert
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