From jreyes@tum.de Wed Mar 06 03:23:31 1996
Path: ashpoly!cascade!mxgate!coyoacan!tum!jreyes
From: jreyes@tum.de (Jen Reyes)
Newsgroups: comp.dsp
Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1996Mar06.032331.2609@tum.de>
Date: Wed, 06 Mar 1996 03:23:31 GMT
Organization: Technische Universität München
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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 symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20).

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

-- 
Jen Reyes
Opinions expressed are solely my own and not those of Technische Universität München.
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From hjohansson@stanford.edu Thu Mar 07 14:57:31 1996
Path: ashpoly!bigsur!pacrim!krgate!eunha!stanford!hjohansson
From: hjohansson@stanford.edu (Heather Johansson)
Newsgroups: comp.dsp
Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1996Mar07.145731.7523@stanford.edu>
Date: Thu, 07 Mar 1996 14:57:31 GMT
References: <1996Mar06.032331.2609@tum.de>
Organization: Stanford University Computer Systems Lab
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In article <1996Mar06.032331.2609@tum.de>, jreyes@tum.de (Jen Reyes) writes:
> Differential Binary Phase Shift Keying (DBPSK) parameter extraction results.

The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration!

Unsubscribe me from this list! (Wait, this is Usenet, never mind).

-- 
Heather Johansson
Tape trading list upon request. SASE required for international mail.

From ajohansson@inria.fr Sat Mar 09 07:39:31 1996
Path: ashpoly!bigsur!pacrim!krgate!eunha!inria!ajohansson
From: ajohansson@inria.fr (Astrid Johansson)
Newsgroups: comp.dsp
Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1996Mar09.073931.7856@inria.fr>
Date: Sat, 09 Mar 1996 07:39:31 GMT
References: <1996Mar06.032331.2609@tum.de>
Organization: INRIA Rocquencourt
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In article <1996Mar06.032331.2609@tum.de>, jreyes@tum.de (Jen Reyes) writes:
> Differential Binary Phase Shift Keying (DBPSK) parameter extraction results.

The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code.

-- 
=== Astrid Johansson ===
Dept of Electrical Engineering, INRIA Rocquencourt
"When every node is whole, the channel opens."