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Article #250Re: Increasing the speed of dial-up to that of cable -- possible?
From: kony
Date: Tue, 14 Aug 2007 01:06
Date: Tue, 14 Aug 2007 01:06
33 lines
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2734 bytes
On Mon, 13 Aug 2007 15:49:34 -0700, Radium <glucegen1@gmail.com> wrote: >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 No, and you're "doing it again", drifting off into crazy wasteful nonsense. If all they had to do to get broadband cable speeds was modulate differently, they'd have done it years ago. They did actually, but it had a cap too low to make it marketable vs cable or ADSL.
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