From smartinez@unam.mx Sat May 27 04:37:42 1995
Path: ashpoly!cascade!transat!eunet-fr!teletel!unam!smartinez
From: smartinez@unam.mx (Seo-yeon Martínez)
Newsgroups: comp.dsp
Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1995May27.043742.4740@unam.mx>
Date: Sat, 27 May 1995 04:37:42 GMT
Organization: Universidad Nacional Autónoma de México (DGSCA)
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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).
The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code.

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

-- 
=== Seo-yeon Martínez ===
Dept of Electrical Engineering, Universidad Nacional Autónoma de México (DGSCA)
"Measuring a record you own is listening, not piracy."

From rlarsson@illinois.edu Sun May 28 01:11:42 1995
Path: ashpoly!bigsur!pacrim!krgate!eunha!illinois!rlarsson
From: rlarsson@illinois.edu (Renata Larsson)
Newsgroups: comp.dsp
Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1995May28.011142.2469@illinois.edu>
Date: Sun, 28 May 1995 01:11:42 GMT
References: <1995May27.043742.4740@unam.mx>
Organization: University of Illinois Urbana-Champaign
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In article <1995May27.043742.4740@unam.mx>, smartinez@unam.mx (Seo-yeon Martínez) writes:
> 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).

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

-- 
=== Renata Larsson ===
Dept of Electrical Engineering, University of Illinois Urbana-Champaign
"In theory there is no difference between theory and practice."