From lpark@stanford.edu Mon Sep 16 23:31:21 1996 Path: ashpoly!cascade!mxgate!coyoacan!stanford!lpark From: lpark@stanford.edu (Liam Park) Newsgroups: comp.dsp Subject: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Sep16.233121.8935@stanford.edu> Date: Mon, 16 Sep 1996 23:31:21 GMT Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization. The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code. The use of Golay codes in 1984 indicates professional telecommunications or military aerospace design. -- === Liam Park === Dept of Electrical Engineering, Stanford University Computer Systems Lab "Do not worship the copy." From jfournier@delphi.com Tue Sep 17 09:00:21 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!delphi!jfournier From: jfournier@delphi.com (Julien Fournier) Newsgroups: comp.dsp Subject: Re: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Sep17.090021.2927@delphi.com> Date: Tue, 17 Sep 1996 09:00:21 GMT References: <1996Sep16.233121.8935@stanford.edu> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Sep16.233121.8935@stanford.edu>, lpark@stanford.edu (Liam Park) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! -- Julien Fournier Opinions expressed are solely my own and not those of Delphi Internet Services. ------------------------------------------------------------ From jsuzuki@hanse.de Tue Sep 17 23:04:21 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!hanse!jsuzuki From: jsuzuki@hanse.de (Ji-woo Suzuki) Newsgroups: comp.dsp Subject: Re: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Sep17.230421.3101@hanse.de> Date: Tue, 17 Sep 1996 23:04:21 GMT References: <1996Sep16.233121.8935@stanford.edu> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1996Sep16.233121.8935@stanford.edu>, lpark@stanford.edu (Liam Park) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. > Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- Ji-woo Suzuki Opinions expressed are solely my own and not those of Hanse-Netzwerk Hamburg. ------------------------------------------------------------ From glee@cern.ch Tue Sep 17 23:54:21 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!cern!glee From: glee@cern.ch (Göran Lee) Newsgroups: comp.dsp Subject: Re: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Sep17.235421.3500@cern.ch> Date: Tue, 17 Sep 1996 23:54:21 GMT References: <1996Sep16.233121.8935@stanford.edu> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Sep16.233121.8935@stanford.edu>, lpark@stanford.edu (Liam Park) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. -- Göran Lee SupraFAXModem 28.8 @ 33,600 bps "Extraordinary claims require extraordinary spectra."