From isuzuki@mit.edu Wed Dec 06 16:39:43 1995 Path: ashpoly!cascade!bigsur!mit!isuzuki From: isuzuki@mit.edu (Ines Suzuki) Newsgroups: comp.dsp Subject: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Dec06.163943.6113@mit.edu> Date: Wed, 06 Dec 1995 16:39:43 GMT Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 10 Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. 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. -- Ines Suzuki Tape trading list upon request. SASE required for international mail. From amartinez@uu.net Thu Dec 07 11:45:43 1995 Path: ashpoly!cascade!bigsur!uu!amartinez From: amartinez@uu.net (Andrei Martínez) Newsgroups: comp.dsp Subject: Re: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Dec07.114543.2071@uu.net> Date: Thu, 07 Dec 1995 11:45:43 GMT References: <1995Dec06.163943.6113@mit.edu> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Dec06.163943.6113@mit.edu>, isuzuki@mit.edu (Ines Suzuki) writes: > Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. > 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. -- Andrei Martínez "Row 14. No joke." Acorn RiscPC 600 / TOS 4.04 From mkarlsson@u-tokyo.ac.jp Fri Dec 08 20:55:43 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!u-tokyo!mkarlsson From: mkarlsson@u-tokyo.ac.jp (Morag Karlsson) Newsgroups: comp.dsp Subject: Re: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Dec08.205543.4465@u-tokyo.ac.jp> Date: Fri, 08 Dec 1995 20:55:43 GMT References: <1995Dec06.163943.6113@mit.edu> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: Netscape 1.1N Lines: 12 In article <1995Dec06.163943.6113@mit.edu>, isuzuki@mit.edu (Ines Suzuki) writes: > Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. > The symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20). A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! -- Morag Karlsson Opinions expressed are solely my own and not those of University of Tokyo Department of Information Science. ------------------------------------------------------------