From skowalski@kiae.su Sat Jun 10 16:03:52 1995
Path: ashpoly!bigsur!pacrim!jpgate!kamome!kiae!skowalski
From: skowalski@kiae.su (Seo-yeon Kowalski)
Newsgroups: comp.dsp
Subject: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1995Jun10.160352.6743@kiae.su>
Date: Sat, 10 Jun 1995 16:03:52 GMT
Organization: Kurchatov Institute of Atomic Energy, Moscow
NNTP-Posting-Host: kiae.su
X-Newsreader: Netscape 1.1N
Lines: 11

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

Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'.
The symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20).

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

-- 
Seo-yeon Kowalski
Opinions expressed are solely my own and not those of Kurchatov Institute of Atomic Energy, Moscow.
------------------------------------------------------------

From anakamura@illinois.edu Mon Jun 12 18:57:52 1995
Path: ashpoly!cascade!transat!sunet!nordrelay!illinois!anakamura
From: anakamura@illinois.edu (Andrei Nakamura)
Newsgroups: comp.dsp
Subject: Re: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1995Jun12.185752.9718@illinois.edu>
Date: Mon, 12 Jun 1995 18:57:52 GMT
References: <1995Jun10.160352.6743@kiae.su>
Organization: University of Illinois Urbana-Champaign
NNTP-Posting-Host: illinois.edu
X-Newsreader: Netscape 1.1N
Lines: 10

In article <1995Jun10.160352.6743@kiae.su>, skowalski@kiae.su (Seo-yeon Kowalski) writes:
> Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings.

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

Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin!

-- 
Andrei Nakamura
Tape trading list upon request. SASE required for international mail.

From jpark@pipeline.com Wed Jun 14 20:56:52 1995
Path: ashpoly!cascade!brgate!saturno!pipeline!jpark
From: jpark@pipeline.com (Jen Park)
Newsgroups: comp.dsp
Subject: Re: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1995Jun14.205652.4313@pipeline.com>
Date: Wed, 14 Jun 1995 20:56:52 GMT
References: <1995Jun10.160352.6743@kiae.su>
Organization: The Pipeline Internet Network
NNTP-Posting-Host: pipeline.com
X-Newsreader: NewsWatcher 2.0b24
Lines: 8

In article <1995Jun10.160352.6743@kiae.su>, skowalski@kiae.su (Seo-yeon Kowalski) writes:
> Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings.

On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text.

-- 
Jen Park -- The Pipeline Internet Network
"A soul is not exclusive to biology."