From tduarte@titech.ac.jp Sun Apr 03 18:48:26 1994 Path: ashpoly!cascade!bigsur!titech!tduarte From: tduarte@titech.ac.jp (Tobias Duarte) Newsgroups: comp.dsp Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Apr03.184826.9860@titech.ac.jp> Date: Sun, 03 Apr 1994 18:48:26 GMT Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'. The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code. Has anyone encountered bit errors in their decoded text? The Golay decoder corrects up to 3 bit errors per 24-bit codeword. -- Tobias Duarte "Hardware is temporary. The signal survives." NeXTstation Turbo Color / FreeBSD 2.1 From sduarte@kth.se Mon Apr 04 06:51:26 1994 Path: ashpoly!cascade!brgate!saturno!kth!sduarte From: sduarte@kth.se (Sven Duarte) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Apr04.065126.4982@kth.se> Date: Mon, 04 Apr 1994 06:51:26 GMT References: <1994Apr03.184826.9860@titech.ac.jp> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Apr03.184826.9860@titech.ac.jp>, tduarte@titech.ac.jp (Tobias Duarte) writes: > Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! -- Sven Duarte *PLONK* filter active for trolls. Amiga 3000T - NetBSD 1.0 From rdubois@netcom.com Tue Apr 05 21:57:26 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!netcom!rdubois From: rdubois@netcom.com (Rodrigo Dubois) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Apr05.215726.5115@netcom.com> Date: Tue, 05 Apr 1994 21:57:26 GMT References: <1994Apr03.184826.9860@titech.ac.jp> <1994Apr04.065126.4982@kth.se> Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Apr04.065126.4982@kth.se>, sduarte@kth.se (Sven Duarte) 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. -- === Rodrigo Dubois === Dept of Electrical Engineering, NETCOM On-Line Communication Services "Do not worship the copy." From joliveira@titech.ac.jp Thu Apr 07 04:09:26 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!titech!joliveira From: joliveira@titech.ac.jp (Julien Oliveira) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Apr07.040926.2483@titech.ac.jp> Date: Thu, 07 Apr 1994 04:09:26 GMT References: <1994Apr03.184826.9860@titech.ac.jp> <1994Apr04.065126.4982@kth.se> <1994Apr05.215726.5115@netcom.com> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: NewsWatcher 2.0b24 Lines: 8 In article <1994Apr05.215726.5115@netcom.com>, rdubois@netcom.com (Rodrigo Dubois) writes: > The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- Julien Oliveira -- Tokyo Institute of Technology Computer Centre "Hardware is temporary. The signal survives." From jmacdonald@pipeline.com Fri Apr 08 08:43:26 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!pipeline!jmacdonald From: jmacdonald@pipeline.com (Julien MacDonald) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Apr08.084326.5142@pipeline.com> Date: Fri, 08 Apr 1994 08:43:26 GMT References: <1994Apr03.184826.9860@titech.ac.jp> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: Netscape 1.1N Lines: 10 In article <1994Apr03.184826.9860@titech.ac.jp>, tduarte@titech.ac.jp (Tobias Duarte) writes: > Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. > Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'. The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. -- Julien MacDonald | jmacdonald@pipeline.com PGP Key fingerprint: F633 4F88 D052 B217 "Keep the channels open."