From ldubois@illinois.edu Sat Jun 10 05:43:08 1995
Path: ashpoly!cascade!bigsur!illinois!ldubois
From: ldubois@illinois.edu (Lisa Dubois)
Newsgroups: comp.dsp
Subject: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1995Jun10.054308.5306@illinois.edu>
Date: Sat, 10 Jun 1995 05:43:08 GMT
Organization: University of Illinois Urbana-Champaign
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Differential Binary Phase Shift Keying (DBPSK) parameter extraction results.

Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'.
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.

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

From kschneider@rwth-aachen.de Sat Jun 10 07:09:08 1995
Path: ashpoly!cascade!transat!eunet-de!hansebox!rwth-aachen!kschneider
From: kschneider@rwth-aachen.de (Karen Schneider)
Newsgroups: comp.dsp
Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1995Jun10.070908.6376@rwth-aachen.de>
Date: Sat, 10 Jun 1995 07:09:08 GMT
References: <1995Jun10.054308.5306@illinois.edu>
Organization: RWTH Aachen Informatik
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In article <1995Jun10.054308.5306@illinois.edu>, ldubois@illinois.edu (Lisa Dubois) writes:
> Differential Binary Phase Shift Keying (DBPSK) parameter extraction results.
> 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!

-- 
=== Karen Schneider ===
Dept of Electrical Engineering, RWTH Aachen Informatik
"Tape doesn't lie at 02:14. Ears do."