From joliveira@ox.ac.uk Fri Jan 12 03:27:35 1996
Path: ashpoly!cascade!bigsur!ox!joliveira
From: joliveira@ox.ac.uk (Jen Oliveira)
Newsgroups: comp.dsp
Subject: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1996Jan12.032735.7258@ox.ac.uk>
Date: Fri, 12 Jan 1996 03:27:35 GMT
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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.
Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization.

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

-- 
Jen Oliveira | joliveira@ox.ac.uk
PGP Key fingerprint: 5D5F 53E8 DB18 FC08
"Keep the channels open."

From hramirez@demon.co.uk Sun Jan 14 04:14:35 1996
Path: ashpoly!bigsur!pacrim!jpgate!kamome!demon!hramirez
From: hramirez@demon.co.uk (Hugo Ramírez)
Newsgroups: comp.dsp
Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1996Jan14.041435.9227@demon.co.uk>
Date: Sun, 14 Jan 1996 04:14:35 GMT
References: <1996Jan12.032735.7258@ox.ac.uk>
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In article <1996Jan12.032735.7258@ox.ac.uk>, joliveira@ox.ac.uk (Jen Oliveira) 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.

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

-- 
Hugo Ramírez | hramirez@demon.co.uk
PGP Key fingerprint: DE4E C0C2 48DA BE62
"Keep the channels open."

From amoreau@kiae.su Sun Jan 14 17:32:35 1996
Path: ashpoly!bigsur!pacrim!jpgate!kamome!kiae!amoreau
From: amoreau@kiae.su (Anton Moreau)
Newsgroups: comp.dsp
Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1996Jan14.173235.2126@kiae.su>
Date: Sun, 14 Jan 1996 17:32:35 GMT
References: <1996Jan12.032735.7258@ox.ac.uk>
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In article <1996Jan12.032735.7258@ox.ac.uk>, joliveira@ox.ac.uk (Jen Oliveira) 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.

Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin!

-- 
Anton Moreau | amoreau@kiae.su
PGP Key fingerprint: ED4E D748 786D C252
"Keep the channels open."

From gramirez@cern.ch Mon Jan 15 06:07:35 1996
Path: ashpoly!cascade!transat!sunet!nordrelay!cern!gramirez
From: gramirez@cern.ch (Graham Ramírez)
Newsgroups: comp.dsp
Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1996Jan15.060735.8200@cern.ch>
Date: Mon, 15 Jan 1996 06:07:35 GMT
References: <1996Jan12.032735.7258@ox.ac.uk>
Organization: European Laboratory for Particle Physics, Geneva
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In article <1996Jan12.032735.7258@ox.ac.uk>, joliveira@ox.ac.uk (Jen Oliveira) 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.

Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame.

-- 
Graham Ramírez -- European Laboratory for Particle Physics, Geneva
"The hatch is open. Is anyone listening?"