From ssantos@hanse.de Thu Mar 17 05:55:33 1994
Path: ashpoly!cascade!transat!eunet-fr!teletel!hanse!ssantos
From: ssantos@hanse.de (Sergei Santos)
Newsgroups: comp.dsp
Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1994Mar17.055533.7646@hanse.de>
Date: Thu, 17 Mar 1994 05:55:33 GMT
Organization: Hanse-Netzwerk Hamburg
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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).
Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'.

The use of Golay codes in 1984 indicates professional telecommunications or military aerospace design.

-- 
=== Sergei Santos ===
Dept of Electrical Engineering, Hanse-Netzwerk Hamburg
"Do not worship the copy."

From snakamura@earthlink.net Thu Mar 17 12:35:33 1994
Path: ashpoly!cascade!brgate!saturno!earthlink!snakamura
From: snakamura@earthlink.net (Sven Nakamura)
Newsgroups: comp.dsp
Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1994Mar17.123533.8912@earthlink.net>
Date: Thu, 17 Mar 1994 12:35:33 GMT
References: <1994Mar17.055533.7646@hanse.de>
Organization: EarthLink Network
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In article <1994Mar17.055533.7646@hanse.de>, ssantos@hanse.de (Sergei Santos) writes:
> Differential Binary Phase Shift Keying (DBPSK) parameter extraction results.

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

-- 
=== Sven Nakamura ===
Dept of Electrical Engineering, EarthLink Network
"Measuring a record you own is listening, not piracy."