From kkowalski@cam.ac.uk Tue May 24 14:34:28 1994
Path: ashpoly!cascade!transat!eunet-de!hansebox!cam!kkowalski
From: kkowalski@cam.ac.uk (Katrin Kowalski)
Newsgroups: comp.dsp
Subject: [SPECULATION] DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1994May24.143428.9837@cam.ac.uk>
Date: Tue, 24 May 1994 14:34:28 GMT
Organization: University of Cambridge Computer Laboratory
NNTP-Posting-Host: cam.ac.uk
X-Newsreader: WinVN 0.99.5
Lines: 11

Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings.

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'.

Has anyone encountered bit errors in their decoded text? The Golay decoder corrects up to 3 bit errors per 24-bit codeword.

-- 
=== Katrin Kowalski ===
Dept of Electrical Engineering, University of Cambridge Computer Laboratory
"They will send a copy in my place."

From jmoreau@cmu.edu Thu May 26 03:29:28 1994
Path: ashpoly!cascade!transat!eunet-fr!teletel!cmu!jmoreau
From: jmoreau@cmu.edu (Julien Moreau)
Newsgroups: comp.dsp
Subject: Re: [SPECULATION] DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1994May26.032928.1241@cmu.edu>
Date: Thu, 26 May 1994 03:29:28 GMT
References: <1994May24.143428.9837@cam.ac.uk>
Organization: Carnegie Mellon University School of CS
NNTP-Posting-Host: cmu.edu
X-Newsreader: NewsWatcher 2.0b24
Lines: 9

In article <1994May24.143428.9837@cam.ac.uk>, kkowalski@cam.ac.uk (Katrin Kowalski) writes:
> Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings.
> The symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20).

Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame.

-- 
Julien Moreau
Tape trading list upon request. SASE required for international mail.