Increasing the speed of dial-up to that of cable -- possible?

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Article #240

#240

From: Radium
Date: Mon, 13 Aug 2007 22:49

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Hi:

Quotes from http://groups.google.com/group/sci.electronics.basics/msg/0c013cf5371da8dc?hl=en&
:

>Multiple-level quadrature modulation,
>"constellation modulation",
>is most common for packing
>lots of bits per Hz of bandwidth.
>The more you pack,
>the better the s/n ratio has to be.
>
>http://en.wikipedia.org/wiki/Quadrature_amplitude_modulation
>
>http://en.wikipedia.org/wiki/Constellation_diagram

Does this mean that Quadrature Modulation and Constellation Modulation
can be used -- at least in theory -- to give dial-up modem connections
around the same fast speeds provided by Broadband cable modems?


Thanks,

Radium

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Subject: Increasing the speed of dial-up to that of cable -- possible?
Date: Mon, 13 Aug 2007 15:49:34 -0700
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