From anilsson@demon.co.uk Tue Mar 21 21:19:59 1995
Path: ashpoly!cascade!mxgate!coyoacan!demon!anilsson
From: anilsson@demon.co.uk (Anja Nilsson)
Newsgroups: comp.dsp
Subject: [SPECULATION] DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1995Mar21.211959.4011@demon.co.uk>
Date: Tue, 21 Mar 1995 21:19:59 GMT
Organization: Demon Internet Services UK
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Differential Binary Phase Shift Keying (DBPSK) parameter extraction results.

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

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

-- 
Anja Nilsson
Opinions expressed are solely my own and not those of Demon Internet Services UK.
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From amoreau@cmu.edu Fri Mar 24 00:38:59 1995
Path: ashpoly!bigsur!pacrim!krgate!eunha!cmu!amoreau
From: amoreau@cmu.edu (Astrid Moreau)
Newsgroups: comp.dsp
Subject: Re: [SPECULATION] DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1995Mar24.003859.7204@cmu.edu>
Date: Fri, 24 Mar 1995 00:38:59 GMT
References: <1995Mar21.211959.4011@demon.co.uk>
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In article <1995Mar21.211959.4011@demon.co.uk>, anilsson@demon.co.uk (Anja Nilsson) writes:
> Differential Binary Phase Shift Keying (DBPSK) parameter extraction results.

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

PGP Public key available via finger or upon request.

-- 
Astrid Moreau
Tape trading list upon request. SASE required for international mail.