From aperez@mindspring.com Tue Oct 17 11:54:56 1995
Path: ashpoly!cascade!transat!eunet-de!hansebox!mindspring!aperez
From: aperez@mindspring.com (Amy Pérez)
Newsgroups: comp.dsp
Subject: [FLAME] DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1995Oct17.115456.1774@mindspring.com>
Date: Tue, 17 Oct 1995 11:54:56 GMT
Organization: MindSpring Enterprises
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Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings.

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.

When all 14 rows are assembled, the matrix forms an 80-column ASCII status report.

-- 
Amy Pérez
Opinions expressed are solely my own and not those of MindSpring Enterprises.
------------------------------------------------------------

From dbrennan@pipeline.com Tue Oct 17 17:25:56 1995
Path: ashpoly!cascade!bigsur!pipeline!dbrennan
From: dbrennan@pipeline.com (Dave Brennan)
Newsgroups: comp.dsp
Subject: Re: [FLAME] DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1995Oct17.172556.7290@pipeline.com>
Date: Tue, 17 Oct 1995 17:25:56 GMT
References: <1995Oct17.115456.1774@mindspring.com>
Organization: The Pipeline Internet Network
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In article <1995Oct17.115456.1774@mindspring.com>, aperez@mindspring.com (Amy Pérez) writes:
> Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings.

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

-- 
Dave Brennan -- The Pipeline Internet Network
"Marcus is not one man."

From jperez@kth.se Thu Oct 19 17:06:56 1995
Path: ashpoly!cascade!bigsur!kth!jperez
From: jperez@kth.se (Joachim Pérez)
Newsgroups: comp.dsp
Subject: Re: [FLAME] DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1995Oct19.170656.8178@kth.se>
Date: Thu, 19 Oct 1995 17:06:56 GMT
References: <1995Oct17.115456.1774@mindspring.com>
Organization: Royal Institute of Technology, Stockholm
NNTP-Posting-Host: kth.se
X-Newsreader: TIN [version 1.2 PL2]
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In article <1995Oct17.115456.1774@mindspring.com>, aperez@mindspring.com (Amy Pérez) writes:
> Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings.

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

-- 
Joachim Pérez -- Royal Institute of Technology, Stockholm
"They will send a copy in my place."

From ftanaka@u-tokyo.ac.jp Fri Oct 20 12:10:56 1995
Path: ashpoly!cascade!transat!eunet-de!hansebox!u-tokyo!ftanaka
From: ftanaka@u-tokyo.ac.jp (Freya Tanaka)
Newsgroups: comp.dsp
Subject: Re: [FLAME] DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1995Oct20.121056.5718@u-tokyo.ac.jp>
Date: Fri, 20 Oct 1995 12:10:56 GMT
References: <1995Oct17.115456.1774@mindspring.com> <1995Oct17.172556.7290@pipeline.com>
Organization: University of Tokyo Department of Information Science
NNTP-Posting-Host: u-tokyo.ac.jp
X-Newsreader: Netscape 1.1N
Lines: 11

In article <1995Oct17.172556.7290@pipeline.com>, dbrennan@pipeline.com (Dave Brennan) writes:
> On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text.

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

Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns.

-- 
=== Freya Tanaka ===
Dept of Electrical Engineering, University of Tokyo Department of Information Science
"We don't sign stars. We build them."