[opendtv] Re: New iPhone antenna has same 'death grip'
- From: "Manfredi, Albert E" <albert.e.manfredi@xxxxxxxxxx>
- To: "opendtv@xxxxxxxxxxxxx" <opendtv@xxxxxxxxxxxxx>
- Date: Wed, 9 Feb 2011 14:57:53 -0600
Craig Birkmaier wrote:
> The question is, is all of this due to network capacity issues, or
> are the carriers purposely dropping calls to build their case for
> more spectrum?
Good question.
> And as far as the technologies behind each network, the simple fact
> remains that they are incompatible, requiring different chips in
> the phones.
There is no technical reason why you can't design a CDMA receiver that is
compatible with both the US and Euro variants of W-CDMA. If "they" wanted to,
they could have harmonized the two standards. My question is, if "they" didn't
want to combine the W-CDMA schemes in the past, what makes anyone think that
"they" will want to all coexist in one happy LTE network in the future? Or will
"they" simply invent new artifacts that make the various networks incompatible?
This is a little like analog or digital TV. There's no technical reason why
they were designed to be incompatible around the world. If they are
incompatible, it's because certain interests saw it to be to their advantage.
So, what has changed with 4G, if anything?
Possibly, the entire problem was caused by patent squabbles between Qualcomm
and others, and LTE was mandated not to have such patent disputes? I don't
know. This sounds as unlikely to me as the excuses given for the then-new Sony
8mm analog camcorder format. Just another incompatible tape format to deal
with, as far as I was concerned. A compatible, compact version of VHS existed.
> AT&T has a better data network that can be used simultaneously with
> the voice network.
Verizon long ago merged their 2G voice and 3G networks, migrating everyone to
3G. They could do this, because their 2G network was also CDMA, and the upgrade
was designed to be smooth and seamless. Unlike AT&T and all other cellcos that
were using TDMA in 2G, and had to assign new spectrum for their 3G network.
That's why these other GSM-type networks spent so much time and effort
extending the life of their 2G networks, with EDGE and GPRS, while Verizon just
converted everything to 3G. And why AT&T now have to deal with all that
incompatible 2G legacy.
Also, the voice and data combined is not, I don't think, any restriction in the
modulation scheme.
> Makes one wonder how long radio broadcasters will keep wasting
> spectrum for their analog service and start using all of it for
> better digital service...
Good point. Why doesn't the FCC push an end to analog AM and FM? The answer is,
I think, is they try not to meddle if they don't see any value in meddling. The
radio bands are not nearly wide enough, or short wavelength enough, to offer
any benefits to wireless broadband, so the FCC can ignore those bands. Just let
them do whatever they like.
Bert
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