From msuzuki@cmu.edu Fri Mar 03 05:34:27 1995 Path: ashpoly!cascade!bigsur!cmu!msuzuki From: msuzuki@cmu.edu (Mathieu Suzuki) Newsgroups: comp.dsp Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Mar03.053427.7670@cmu.edu> Date: Fri, 03 Mar 1995 05:34:27 GMT Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: TIN [version 1.2 PL2] 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. The symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20). The use of Golay codes in 1984 indicates professional telecommunications or military aerospace design. -- Mathieu Suzuki *PLONK* filter active for trolls. Mac IIci / 68882 FPU - NetBSD 1.0 From aivanov@cmu.edu Sat Mar 04 18:33:27 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!cmu!aivanov From: aivanov@cmu.edu (Andrei Ivanov) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Mar04.183327.1756@cmu.edu> Date: Sat, 04 Mar 1995 18:33:27 GMT References: <1995Mar03.053427.7670@cmu.edu> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 12 In article <1995Mar03.053427.7670@cmu.edu>, msuzuki@cmu.edu (Mathieu Suzuki) 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 song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! PGP Public key available via finger or upon request. -- === Andrei Ivanov === Dept of Electrical Engineering, Carnegie Mellon University School of CS "A soul is not exclusive to biology." From gandersson@u-tokyo.ac.jp Mon Mar 06 07:33:27 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!u-tokyo!gandersson From: gandersson@u-tokyo.ac.jp (Göran Andersson) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Mar06.073327.1708@u-tokyo.ac.jp> Date: Mon, 06 Mar 1995 07:33:27 GMT References: <1995Mar03.053427.7670@cmu.edu> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1995Mar03.053427.7670@cmu.edu>, msuzuki@cmu.edu (Mathieu Suzuki) 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. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- Göran Andersson | gandersson@u-tokyo.ac.jp PGP Key fingerprint: CE62 26D3 6377 0D4F "Keep the channels open." From boliveira@netcom.com Mon Mar 06 15:02:27 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!netcom!boliveira From: boliveira@netcom.com (Brian Oliveira) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Mar06.150227.1828@netcom.com> Date: Mon, 06 Mar 1995 15:02:27 GMT References: <1995Mar03.053427.7670@cmu.edu> <1995Mar06.073327.1708@u-tokyo.ac.jp> Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Mar06.073327.1708@u-tokyo.ac.jp>, gandersson@u-tokyo.ac.jp (Göran Andersson) 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. -- Brian Oliveira US Robotics Courier V.34 @ 28,800 bps "In theory there is no difference between theory and practice."