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From: carroll@ssc-vax (Jeff Carroll)
Newsgroups: rec.radio.amateur.packet,comp.protocols.tcp-ip,comp.dcom.lans
Subject: Re: CDMA
Message-ID: <4153@ssc-bee.ssc-vax.UUCP>
Date: 19 Jun 91 23:05:25 GMT
References: <1991Jun17.010513.23812@tandem.com> <1991Jun18.175959.29344@ulowell.ulowell.edu>
Sender: news@ssc-vax.UUCP
Reply-To: carroll@ssc-vax.UUCP (Jeff Carroll)
Organization: Boeing Aerospace & Electronics
Lines: 22

In article <1991Jun18.175959.29344@ulowell.ulowell.edu> wex@cs.ulowell.edu writes:
>I am looking for pointers to an elementary description of how
>CDMA works in practice;  I have seen simple example descriptions,
>I have no idea, for example how many chips/bit occur in practice,
>whate actual bandwidth is in the real world.

	This will be difficult to find in the open press. A typical case
might be 500 chips/bit, and bandwidth between first nulls on the order of
10^8 Hz.

	You might want to check the latest issue of the IEEE Transactions
on Vehicular Technology, where Klein Gilhousen and other members of the
technical staff at Qualcomm, Inc. talk about their CDMA cellular system
(I haven't read my copy yet.)



-- 
Jeff Carroll		carroll@ssc-vax.boeing.com

"...and of their daughters it is written, 'Cursed be he who lies with 
any manner of animal.'" - Talmud