From mperez@unam.mx Sat Feb 03 04:46:45 1996
Path: ashpoly!bigsur!pacrim!krgate!eunha!unam!mperez
From: mperez@unam.mx (Mei Pérez)
Newsgroups: comp.dsp
Subject: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1996Feb03.044645.4015@unam.mx>
Date: Sat, 03 Feb 1996 04:46:45 GMT
Organization: Universidad Nacional Autónoma de México (DGSCA)
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Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings.

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.

-- 
Mei Pérez
Opinions expressed are solely my own and not those of Universidad Nacional Autónoma de México (DGSCA).
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From jpopov@titech.ac.jp Sat Feb 03 17:59:45 1996
Path: ashpoly!cascade!brgate!saturno!titech!jpopov
From: jpopov@titech.ac.jp (Jens Popov)
Newsgroups: comp.dsp
Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1996Feb03.175945.8498@titech.ac.jp>
Date: Sat, 03 Feb 1996 17:59:45 GMT
References: <1996Feb03.044645.4015@unam.mx>
Organization: Tokyo Institute of Technology Computer Centre
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Lines: 10

In article <1996Feb03.044645.4015@unam.mx>, mperez@unam.mx (Mei Pérez) writes:
> Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings.
> 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!

-- 
Jens Popov
Opinions expressed are solely my own and not those of Tokyo Institute of Technology Computer Centre.
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