Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!mailrus!accuvax.nwu.edu!nucsrl!telecom-request From: uafhcx!cdc@uafhp.uark.edu (C. D. Covington) Newsgroups: comp.dcom.telecom Subject: Re: Baud per Hertz Message-ID: <8771@accuvax.nwu.edu> Date: 7 Jun 90 15:08:49 GMT Sender: news@accuvax.nwu.edu Organization: College of Engineering, University of Arkansas, Fayetteville Lines: 22 Approved: Telecom@eecs.nwu.edu X-Submissions-To: telecom@eecs.nwu.edu X-Administrivia-To: telecom-request@eecs.nwu.edu X-Telecom-Digest: Volume 10, Issue 419, Message 7 of 11 In article <8731@accuvax.nwu.edu>, bnrgate!.bnr.ca!hwt@uunet.uu.net (Henry Troup) writes: > In article <8683@accuvax.nwu.edu> Rob Warnock writes: > >...(Pushing a 7 baud signal through a 5 Hz pipe is > >quite good! The theoretical maximum is 2 baud/Hz: one state for each > >half-cycle of bandwidth.)... > I don't see a theoretical limit, not if you allow phase modulation. Unlimited bandwidth if there is no noise. We do not have that privilege on analog lines. Theoretical maximum rate of error free information interchange is limited by signal to noise ratio of the connecting channel. 7 baud in 5 Hz is a conclusion based on assumed SNR. C. David Covington (WA5TGF) cdc@uafhcx.uark.edu (501) 575-6583 Asst Prof, Elec Eng Univ of Arkansas Fayetteville, AR 72701