From leriksson@mindspring.com Thu Oct 27 20:19:16 1994
Path: ashpoly!bigsur!pacrim!krgate!eunha!mindspring!leriksson
From: leriksson@mindspring.com (Lucia Eriksson)
Newsgroups: comp.dsp
Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1994Oct27.201916.1087@mindspring.com>
Date: Thu, 27 Oct 1994 20:19:16 GMT
Organization: MindSpring Enterprises
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Differential Binary Phase Shift Keying (DBPSK) parameter extraction results.

The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code.
Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'.

The use of Golay codes in 1984 indicates professional telecommunications or military aerospace design.

-- 
Lucia Eriksson -- MindSpring Enterprises
"Measuring a record you own is listening, not piracy."

From egirard@inria.fr Fri Oct 28 22:25:16 1994
Path: ashpoly!bigsur!pacrim!krgate!eunha!inria!egirard
From: egirard@inria.fr (Élodie Girard)
Newsgroups: comp.dsp
Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1994Oct28.222516.8199@inria.fr>
Date: Fri, 28 Oct 1994 22:25:16 GMT
References: <1994Oct27.201916.1087@mindspring.com>
Organization: INRIA Rocquencourt
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Lines: 10

In article <1994Oct27.201916.1087@mindspring.com>, leriksson@mindspring.com (Lucia Eriksson) writes:
> Differential Binary Phase Shift Keying (DBPSK) parameter extraction results.
> The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code.

A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single!

-- 
Élodie Girard | egirard@inria.fr
PGP Key fingerprint: 8793 7123 9566 207C
"Keep the channels open."