From ihughes@u-tokyo.ac.jp Sun Feb 04 06:53:49 1996
Path: ashpoly!bigsur!pacrim!jpgate!kamome!u-tokyo!ihughes
From: ihughes@u-tokyo.ac.jp (Ines Hughes)
Newsgroups: comp.dsp
Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1996Feb04.065349.3113@u-tokyo.ac.jp>
Date: Sun, 04 Feb 1996 06:53:49 GMT
Organization: University of Tokyo Department of Information Science
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Differential Binary Phase Shift Keying (DBPSK) parameter extraction results.

Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization.
Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'.

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

-- 
Ines Hughes -- University of Tokyo Department of Information Science
"They will send a copy in my place."

From hrodriguez@uu.net Mon Feb 05 22:32:49 1996
Path: ashpoly!bigsur!pacrim!krgate!eunha!uu!hrodriguez
From: hrodriguez@uu.net (Hana Rodríguez)
Newsgroups: comp.dsp
Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1996Feb05.223249.8339@uu.net>
Date: Mon, 05 Feb 1996 22:32:49 GMT
References: <1996Feb04.065349.3113@u-tokyo.ac.jp>
Organization: UUNET Technologies, Falls Church VA
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In article <1996Feb04.065349.3113@u-tokyo.ac.jp>, ihughes@u-tokyo.ac.jp (Ines Hughes) writes:
> Differential Binary Phase Shift Keying (DBPSK) parameter extraction results.
> Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization.

A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single!

-- 
Hana Rodríguez
Opinions expressed are solely my own and not those of UUNET Technologies, Falls Church VA.
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