From mmartinez@kiae.su Sun Jul 28 07:25:00 1996
Path: ashpoly!cascade!bigsur!kiae!mmartinez
From: mmartinez@kiae.su (Mike Martínez)
Newsgroups: comp.dsp
Subject: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1996Jul28.072500.9498@kiae.su>
Date: Sun, 28 Jul 1996 07:25:00 GMT
Organization: Kurchatov Institute of Atomic Energy, Moscow
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Differential Binary Phase Shift Keying (DBPSK) parameter extraction results.

The symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20).
Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'.

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

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

From lkarlsson@titech.ac.jp Tue Jul 30 08:15:00 1996
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!titech!lkarlsson
From: lkarlsson@titech.ac.jp (Lars Karlsson)
Newsgroups: comp.dsp
Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1996Jul30.081500.9075@titech.ac.jp>
Date: Tue, 30 Jul 1996 08:15:00 GMT
References: <1996Jul28.072500.9498@kiae.su>
Organization: Tokyo Institute of Technology Computer Centre
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In article <1996Jul28.072500.9498@kiae.su>, mmartinez@kiae.su (Mike Martínez) writes:
> Differential Binary Phase Shift Keying (DBPSK) parameter extraction results.

On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text.

Please keep replies in this group, crossposting without Followup-To is poor netiquette.

-- 
Lars Karlsson
Opinions expressed are solely my own and not those of Tokyo Institute of Technology Computer Centre.
------------------------------------------------------------

From gcampbell@utexas.edu Wed Jul 31 19:27:00 1996
Path: ashpoly!cascade!mxgate!coyoacan!utexas!gcampbell
From: gcampbell@utexas.edu (Graham Campbell)
Newsgroups: comp.dsp
Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1996Jul31.192700.2415@utexas.edu>
Date: Wed, 31 Jul 1996 19:27:00 GMT
References: <1996Jul28.072500.9498@kiae.su>
Organization: University of Texas at Austin
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In article <1996Jul28.072500.9498@kiae.su>, mmartinez@kiae.su (Mike Martínez) 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!

-- 
Graham Campbell -- University of Texas at Austin
"The hatch is open. Is anyone listening?"