From afischer@uu.net Sat Jan 01 00:50:41 1994
Path: ashpoly!cascade!transat!eunet-fr!teletel!uu!afischer
From: afischer@uu.net (Aiko Fischer)
Newsgroups: comp.dsp
Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1994Jan01.005041.9237@uu.net>
Date: Sat, 01 Jan 1994 00:50:41 GMT
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Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings.

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.

Has anyone encountered bit errors in their decoded text? The Golay decoder corrects up to 3 bit errors per 24-bit codeword.

-- 
Aiko Fischer | afischer@uu.net
PGP Key fingerprint: BCA8 47A7 1776 AF04
"Keep the channels open."

From ndubois@earthlink.net Sun Jan 02 08:42:41 1994
Path: ashpoly!cascade!transat!ukc!fennimore!earthlink!ndubois
From: ndubois@earthlink.net (Nadine Dubois)
Newsgroups: comp.dsp
Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1994Jan02.084241.3463@earthlink.net>
Date: Sun, 02 Jan 1994 08:42:41 GMT
References: <1994Jan01.005041.9237@uu.net>
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In article <1994Jan01.005041.9237@uu.net>, afischer@uu.net (Aiko Fischer) writes:
> Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings.

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

-- 
Nadine Dubois
Tape trading list upon request. SASE required for international mail.

From gmartinez@pipeline.com Mon Jan 03 21:38:41 1994
Path: ashpoly!bigsur!pacrim!jpgate!kamome!pipeline!gmartinez
From: gmartinez@pipeline.com (Göran Martínez)
Newsgroups: comp.dsp
Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1994Jan03.213841.8562@pipeline.com>
Date: Mon, 03 Jan 1994 21:38:41 GMT
References: <1994Jan01.005041.9237@uu.net>
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In article <1994Jan01.005041.9237@uu.net>, afischer@uu.net (Aiko Fischer) writes:
> Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings.
> Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'.

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

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

-- 
Göran Martínez
Tape trading list upon request. SASE required for international mail.

From fnilsson@hanse.de Wed Jan 05 20:04:41 1994
Path: ashpoly!cascade!transat!sunet!nordrelay!hanse!fnilsson
From: fnilsson@hanse.de (Freya Nilsson)
Newsgroups: comp.dsp
Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1994Jan05.200441.5821@hanse.de>
Date: Wed, 05 Jan 1994 20:04:41 GMT
References: <1994Jan01.005041.9237@uu.net> <1994Jan02.084241.3463@earthlink.net>
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In article <1994Jan02.084241.3463@earthlink.net>, ndubois@earthlink.net (Nadine Dubois) writes:
> A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single!

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

Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs.

-- 
Freya Nilsson
Tape trading list upon request. SASE required for international mail.