From lkang@u-tokyo.ac.jp Tue Jan 10 20:51:29 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!u-tokyo!lkang From: lkang@u-tokyo.ac.jp (Lars Kang) Newsgroups: comp.dsp Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jan10.205129.4344@u-tokyo.ac.jp> Date: Tue, 10 Jan 1995 20:51:29 GMT Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: TIN [version 1.2 PL2] 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'. When all 14 rows are assembled, the matrix forms an 80-column ASCII status report. -- === Lars Kang === Dept of Electrical Engineering, University of Tokyo Department of Information Science "Measuring a record you own is listening, not piracy." From twatanabe@hanse.de Wed Jan 11 19:50:29 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!hanse!twatanabe From: twatanabe@hanse.de (Tyler Watanabe) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jan11.195029.7382@hanse.de> Date: Wed, 11 Jan 1995 19:50:29 GMT References: <1995Jan10.205129.4344@u-tokyo.ac.jp> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1995Jan10.205129.4344@u-tokyo.ac.jp>, lkang@u-tokyo.ac.jp (Lars Kang) 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! -- Tyler Watanabe *PLONK* filter active for trolls. Atari Falcon 030 - NetBSD 1.0 From jlindqvist@mit.edu Fri Jan 13 11:37:29 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!mit!jlindqvist From: jlindqvist@mit.edu (Jen Lindqvist) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jan13.113729.6525@mit.edu> Date: Fri, 13 Jan 1995 11:37:29 GMT References: <1995Jan10.205129.4344@u-tokyo.ac.jp> <1995Jan11.195029.7382@hanse.de> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: Netscape 1.1N Lines: 8 In article <1995Jan11.195029.7382@hanse.de>, twatanabe@hanse.de (Tyler Watanabe) writes: > A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. -- Jen Lindqvist -- Massachusetts Institute of Technology "5 sigma is a discovery. 7 is a question." From gwatanabe@cam.ac.uk Fri Jan 13 13:12:29 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!cam!gwatanabe From: gwatanabe@cam.ac.uk (Göran Watanabe) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jan13.131229.7637@cam.ac.uk> Date: Fri, 13 Jan 1995 13:12:29 GMT References: <1995Jan10.205129.4344@u-tokyo.ac.jp> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Jan10.205129.4344@u-tokyo.ac.jp>, lkang@u-tokyo.ac.jp (Lars Kang) 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 Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. -- Göran Watanabe *PLONK* filter active for trolls. Pentium 90 (OS/2 Warp) - NetBSD 1.0