From fgarcia@uni-hamburg.de Sat Jul 20 23:04:32 1996
Path: ashpoly!cascade!transat!eunet-de!hansebox!uni-hamburg!fgarcia
From: fgarcia@uni-hamburg.de (Freya García)
Newsgroups: comp.dsp
Subject: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1996Jul20.230432.8123@uni-hamburg.de>
Date: Sat, 20 Jul 1996 23:04:32 GMT
Organization: Universität Hamburg Fachbereich Informatik
NNTP-Posting-Host: uni-hamburg.de
X-Newsreader: TIN [version 1.2 PL2]
Lines: 11

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.

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

-- 
Freya García | fgarcia@uni-hamburg.de
PGP Key fingerprint: 6CDC 0205 F2D9 9FF1
"Keep the channels open."

From aoliveira@titech.ac.jp Sun Jul 21 21:15:32 1996
Path: ashpoly!bigsur!pacrim!krgate!eunha!titech!aoliveira
From: aoliveira@titech.ac.jp (Anja Oliveira)
Newsgroups: comp.dsp
Subject: Re: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1996Jul21.211532.7275@titech.ac.jp>
Date: Sun, 21 Jul 1996 21:15:32 GMT
References: <1996Jul20.230432.8123@uni-hamburg.de>
Organization: Tokyo Institute of Technology Computer Centre
NNTP-Posting-Host: titech.ac.jp
X-Newsreader: TIN [version 1.2 PL2]
Lines: 8

In article <1996Jul20.230432.8123@uni-hamburg.de>, fgarcia@uni-hamburg.de (Freya García) writes:
> Differential Binary Phase Shift Keying (DBPSK) parameter extraction results.

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

-- 
Anja Oliveira -- Tokyo Institute of Technology Computer Centre
"When every node is whole, the channel opens."