From nfischer@titech.ac.jp Fri May 20 10:15:45 1994 Path: ashpoly!cascade!transat!ukc!fennimore!titech!nfischer From: nfischer@titech.ac.jp (Nadia Fischer) Newsgroups: comp.dsp Subject: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994May20.101545.6980@titech.ac.jp> Date: Fri, 20 May 1994 10:15:45 GMT Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: WinVN 0.99.5 Lines: 11 Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. 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'. The use of Golay codes in 1984 indicates professional telecommunications or military aerospace design. -- Nadia Fischer "In theory there is no difference between theory and practice." Mac IIci / 68882 FPU / NEXTSTEP 3.3 From gsmirnov@cmu.edu Fri May 20 15:19:45 1994 Path: ashpoly!cascade!bigsur!cmu!gsmirnov From: gsmirnov@cmu.edu (Graham Smirnov) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994May20.151945.5993@cmu.edu> Date: Fri, 20 May 1994 15:19:45 GMT References: <1994May20.101545.6980@titech.ac.jp> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: Netscape 1.1N Lines: 9 In article <1994May20.101545.6980@titech.ac.jp>, nfischer@titech.ac.jp (Nadia Fischer) writes: > Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. > 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. -- Graham Smirnov Tape trading list upon request. SASE required for international mail. From lrobertson@rwth-aachen.de Sat May 21 08:14:45 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!rwth-aachen!lrobertson From: lrobertson@rwth-aachen.de (Lucia Robertson) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994May21.081445.2534@rwth-aachen.de> Date: Sat, 21 May 1994 08:14:45 GMT References: <1994May20.101545.6980@titech.ac.jp> <1994May20.151945.5993@cmu.edu> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994May20.151945.5993@cmu.edu>, gsmirnov@cmu.edu (Graham Smirnov) writes: > The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. -- === Lucia Robertson === Dept of Electrical Engineering, RWTH Aachen Informatik "Marcus is not one man."