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From: lien@osu-eddie.UUCP
Newsgroups: comp.dcom.lans
Subject: Re: Ethernet : Broadband vs Baseband
Message-ID: <3164@osu-eddie.UUCP>
Date: Thu, 19-Feb-87 22:36:12 EST
Article-I.D.: osu-eddi.3164
Posted: Thu Feb 19 22:36:12 1987
Date-Received: Sat, 21-Feb-87 01:32:23 EST
References: <2334@sunybcs.UUCP> <18500001@clio> <14863@amdcad.UUCP>
Reply-To: lien@osu-eddie.UUCP (Yao-Nan Lien)
Organization: The Ohio State University, CIS Dept.
Lines: 44

One reason that the broadband system provides higer data rate
is that the spectrum of baseband signals is wider than that of
broadband signals such that the bandwidth utilization of
broadband systems is higher.

Although the carrier signal of broadband signals are higher than
that of baseband signals, the homonic is much less.

Broadband signal use sin wave while baseband signal use squal
wave.


The following diagram cangive you an idea why the spectrum of a
baseband signal is wider after Fourier Transform.



	 ------------      <---- Low frequency componet
	 |          |
	 |          |
	 |          |
	 |          |
	 |          | <-----   High frequency component
	 |          |
	 |          |
	 |          |
	 |          |
    ------          ------------



Yao-Nan Lien
-- 
------------------------------------------------------------
Yao-Nan Lien
Department of Computer and Information Science
Ohio State University
2036, Neil Ave. Mall
Columbus, Ohio 43210-1277
Tel 614 292-5236

CSNet : lien@ohio-state.CSNET
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