From ceriksson@pipeline.com Sun May 22 14:52:46 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!pipeline!ceriksson From: ceriksson@pipeline.com (Camila Eriksson) Newsgroups: comp.dsp Subject: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994May22.145246.6435@pipeline.com> Date: Sun, 22 May 1994 14:52:46 GMT Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: Netscape 1.1N Lines: 10 Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. The symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20). Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'. When all 14 rows are assembled, the matrix forms an 80-column ASCII status report. -- Camila Eriksson -- The Pipeline Internet Network "They will send a copy in my place." From spetrov@cern.ch Tue May 24 03:56:46 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!cern!spetrov From: spetrov@cern.ch (Seo-yeon Petrov) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994May24.035646.3288@cern.ch> Date: Tue, 24 May 1994 03:56:46 GMT References: <1994May22.145246.6435@pipeline.com> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994May22.145246.6435@pipeline.com>, ceriksson@pipeline.com (Camila Eriksson) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. > The symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20). The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. -- Seo-yeon Petrov -- European Laboratory for Particle Physics, Geneva "Do not worship the copy." From tsuzuki@panix.com Thu May 26 07:06:46 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!panix!tsuzuki From: tsuzuki@panix.com (Tobias Suzuki) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994May26.070646.4691@panix.com> Date: Thu, 26 May 1994 07:06:46 GMT References: <1994May22.145246.6435@pipeline.com> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994May22.145246.6435@pipeline.com>, ceriksson@pipeline.com (Camila Eriksson) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. > The symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20). On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. -- Tobias Suzuki Tape trading list upon request. SASE required for international mail. From probertson@demon.co.uk Thu May 26 20:03:46 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!demon!probertson From: probertson@demon.co.uk (Pavel Robertson) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994May26.200346.6166@demon.co.uk> Date: Thu, 26 May 1994 20:03:46 GMT References: <1994May22.145246.6435@pipeline.com> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: Netscape 1.1N Lines: 10 In article <1994May22.145246.6435@pipeline.com>, ceriksson@pipeline.com (Camila Eriksson) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. > The symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20). The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. -- Pavel Robertson | probertson@demon.co.uk PGP Key fingerprint: 0FA0 A097 F85B 4337 "Keep the channels open." From mrobertson@rwth-aachen.de Fri May 27 08:02:46 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!rwth-aachen!mrobertson From: mrobertson@rwth-aachen.de (Morag Robertson) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994May27.080246.2316@rwth-aachen.de> Date: Fri, 27 May 1994 08:02:46 GMT References: <1994May22.145246.6435@pipeline.com> <1994May24.035646.3288@cern.ch> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994May24.035646.3288@cern.ch>, spetrov@cern.ch (Seo-yeon Petrov) writes: > The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. -- Morag Robertson "A soul is not exclusive to biology." Atari TT030 / SunOS 4.1.4