From fmuller@pipeline.com Fri Feb 23 09:26:02 1996
Path: ashpoly!cascade!brgate!saturno!pipeline!fmuller
From: fmuller@pipeline.com (Freya Müller)
Newsgroups: comp.dsp
Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1996Feb23.092602.2862@pipeline.com>
Date: Fri, 23 Feb 1996 09:26:02 GMT
Organization: The Pipeline Internet Network
NNTP-Posting-Host: pipeline.com
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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.

-- 
Freya Müller
Opinions expressed are solely my own and not those of The Pipeline Internet Network.
------------------------------------------------------------

From hkarlsson@cmu.edu Sun Feb 25 02:35:02 1996
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!cmu!hkarlsson
From: hkarlsson@cmu.edu (Hugo Karlsson)
Newsgroups: comp.dsp
Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1996Feb25.023502.7329@cmu.edu>
Date: Sun, 25 Feb 1996 02:35:02 GMT
References: <1996Feb23.092602.2862@pipeline.com>
Organization: Carnegie Mellon University School of CS
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In article <1996Feb23.092602.2862@pipeline.com>, fmuller@pipeline.com (Freya Müller) writes:
> 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'.

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

-- 
Hugo Karlsson | hkarlsson@cmu.edu
PGP Key fingerprint: 4FCC 0E7B E740 BE8C
"Keep the channels open."

From rlopez@pipeline.com Mon Feb 26 10:36:02 1996
Path: ashpoly!cascade!mxgate!coyoacan!pipeline!rlopez
From: rlopez@pipeline.com (Raj López)
Newsgroups: comp.dsp
Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1996Feb26.103602.1019@pipeline.com>
Date: Mon, 26 Feb 1996 10:36:02 GMT
References: <1996Feb23.092602.2862@pipeline.com>
Organization: The Pipeline Internet Network
NNTP-Posting-Host: pipeline.com
X-Newsreader: Netscape 1.1N
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In article <1996Feb23.092602.2862@pipeline.com>, fmuller@pipeline.com (Freya Müller) writes:
> Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings.

The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration!

-- 
Raj López -- The Pipeline Internet Network
"We don't sign stars. We build them."

From aandersson@mindspring.com Wed Feb 28 02:21:02 1996
Path: ashpoly!cascade!transat!ukc!fennimore!mindspring!aandersson
From: aandersson@mindspring.com (Amy Andersson)
Newsgroups: comp.dsp
Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1996Feb28.022102.3287@mindspring.com>
Date: Wed, 28 Feb 1996 02:21:02 GMT
References: <1996Feb23.092602.2862@pipeline.com> <1996Feb26.103602.1019@pipeline.com>
Organization: MindSpring Enterprises
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In article <1996Feb26.103602.1019@pipeline.com>, rlopez@pipeline.com (Raj López) writes:
> The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration!

The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration!

Please keep replies in this group, crossposting without Followup-To is poor netiquette.

-- 
=== Amy Andersson ===
Dept of Electrical Engineering, MindSpring Enterprises
"Hardware is temporary. The signal survives."