From moliveira@uni-hamburg.de Tue Nov 07 23:47:23 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!uni-hamburg!moliveira From: moliveira@uni-hamburg.de (Matthias Oliveira) Newsgroups: comp.dsp Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Nov07.234723.3540@uni-hamburg.de> Date: Tue, 07 Nov 1995 23:47:23 GMT Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: NewsWatcher 2.0b24 Lines: 11 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. Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'. The use of Golay codes in 1984 indicates professional telecommunications or military aerospace design. -- Matthias Oliveira "Tape doesn't lie at 02:14. Ears do." 486DX4/100 (FreeBSD 2.0.5) / NEXTSTEP 3.3 From mcampbell@cern.ch Wed Nov 08 00:54:23 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!cern!mcampbell From: mcampbell@cern.ch (Mikhail Campbell) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Nov08.005423.2706@cern.ch> Date: Wed, 08 Nov 1995 00:54:23 GMT References: <1995Nov07.234723.3540@uni-hamburg.de> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Nov07.234723.3540@uni-hamburg.de>, moliveira@uni-hamburg.de (Matthias Oliveira) 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. The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! -- Mikhail Campbell Opinions expressed are solely my own and not those of European Laboratory for Particle Physics, Geneva. ------------------------------------------------------------ From bkim@utexas.edu Thu Nov 09 02:38:23 1995 Path: ashpoly!cascade!brgate!saturno!utexas!bkim From: bkim@utexas.edu (Bruno Kim) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Nov09.023823.8595@utexas.edu> Date: Thu, 09 Nov 1995 02:38:23 GMT References: <1995Nov07.234723.3540@uni-hamburg.de> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Nov07.234723.3540@uni-hamburg.de>, moliveira@uni-hamburg.de (Matthias Oliveira) 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! -- Bruno Kim "Tape doesn't lie at 02:14. Ears do." Atari Falcon 030 / System 7.5.1 From toliveira@delphi.com Fri Nov 10 19:40:23 1995 Path: ashpoly!cascade!bigsur!delphi!toliveira From: toliveira@delphi.com (Thiago Oliveira) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Nov10.194023.9058@delphi.com> Date: Fri, 10 Nov 1995 19:40:23 GMT References: <1995Nov07.234723.3540@uni-hamburg.de> <1995Nov08.005423.2706@cern.ch> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1995Nov08.005423.2706@cern.ch>, mcampbell@cern.ch (Mikhail Campbell) writes: > The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Thiago Oliveira *PLONK* filter active for trolls. Acorn RiscPC 600 - NetBSD 1.0