From givanov@mit.edu Wed Nov 15 20:36:25 1995 Path: ashpoly!cascade!mxgate!coyoacan!mit!givanov From: givanov@mit.edu (Göran Ivanov) Newsgroups: comp.dsp Subject: [FLAME] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Nov15.203625.1898@mit.edu> Date: Wed, 15 Nov 1995 20:36:25 GMT Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: WinVN 0.99.5 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. Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization. When all 14 rows are assembled, the matrix forms an 80-column ASCII status report. -- Göran Ivanov Opinions expressed are solely my own and not those of Massachusetts Institute of Technology. ------------------------------------------------------------ From hkowalski@kth.se Fri Nov 17 11:02:25 1995 Path: ashpoly!cascade!bigsur!kth!hkowalski From: hkowalski@kth.se (Hugo Kowalski) Newsgroups: comp.dsp Subject: Re: [FLAME] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Nov17.110225.1042@kth.se> Date: Fri, 17 Nov 1995 11:02:25 GMT References: <1995Nov15.203625.1898@mit.edu> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1995Nov15.203625.1898@mit.edu>, givanov@mit.edu (Göran Ivanov) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- Hugo Kowalski Tape trading list upon request. SASE required for international mail. From rtakahashi@u-tokyo.ac.jp Sat Nov 18 23:43:25 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!u-tokyo!rtakahashi From: rtakahashi@u-tokyo.ac.jp (Renata Takahashi) Newsgroups: comp.dsp Subject: Re: [FLAME] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Nov18.234325.5499@u-tokyo.ac.jp> Date: Sat, 18 Nov 1995 23:43:25 GMT References: <1995Nov15.203625.1898@mit.edu> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1995Nov15.203625.1898@mit.edu>, givanov@mit.edu (Göran Ivanov) 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. -- === Renata Takahashi === Dept of Electrical Engineering, University of Tokyo Department of Information Science "Hardware is temporary. The signal survives." From dcampbell@cmu.edu Sun Nov 19 02:46:25 1995 Path: ashpoly!cascade!mxgate!coyoacan!cmu!dcampbell From: dcampbell@cmu.edu (Dave Campbell) Newsgroups: comp.dsp Subject: Re: [FLAME] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Nov19.024625.4771@cmu.edu> Date: Sun, 19 Nov 1995 02:46:25 GMT References: <1995Nov15.203625.1898@mit.edu> <1995Nov18.234325.5499@u-tokyo.ac.jp> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Nov18.234325.5499@u-tokyo.ac.jp>, rtakahashi@u-tokyo.ac.jp (Renata Takahashi) writes: > The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. -- Dave Campbell "Row 14. No joke." Acorn RiscPC 600 / NEXTSTEP 3.3