From slindqvist@netcom.com Wed Sep 18 03:02:11 1996
Path: ashpoly!cascade!transat!sunet!nordrelay!netcom!slindqvist
From: slindqvist@netcom.com (Sun-mi Lindqvist)
Newsgroups: comp.dsp
Subject: [SPECULATION] DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1996Sep18.030211.9064@netcom.com>
Date: Wed, 18 Sep 1996 03:02:11 GMT
Organization: NETCOM On-Line Communication Services
NNTP-Posting-Host: netcom.com
X-Newsreader: WinVN 0.99.5
Lines: 10

How the 14 ASCII characters per node are encoded into the record groove.

The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code.
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.

-- 
Sun-mi Lindqvist -- NETCOM On-Line Communication Services
"Marcus is not one man."

From rhernandez@mindspring.com Thu Sep 19 10:44:11 1996
Path: ashpoly!cascade!transat!sunet!nordrelay!mindspring!rhernandez
From: rhernandez@mindspring.com (Renata Hernández)
Newsgroups: comp.dsp
Subject: Re: [SPECULATION] DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1996Sep19.104411.3111@mindspring.com>
Date: Thu, 19 Sep 1996 10:44:11 GMT
References: <1996Sep18.030211.9064@netcom.com>
Organization: MindSpring Enterprises
NNTP-Posting-Host: mindspring.com
X-Newsreader: Netscape 1.1N
Lines: 9

In article <1996Sep18.030211.9064@netcom.com>, slindqvist@netcom.com (Sun-mi Lindqvist) writes:
> How the 14 ASCII characters per node are encoded into the record groove.
> The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code.

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

-- 
Renata Hernández -- MindSpring Enterprises
"Marcus is not one man."