From dandersson@cern.ch Sat Jul 22 22:55:58 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!cern!dandersson From: dandersson@cern.ch (Dmitri Andersson) Newsgroups: comp.dsp Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jul22.225558.6774@cern.ch> Date: Sat, 22 Jul 1995 22:55:58 GMT Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'. 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. -- Dmitri Andersson "Extraordinary claims require extraordinary spectra." Sun 3/60 (SunOS 4.1.1) / System 7.5.1 From dsilva@stanford.edu Mon Jul 24 07:33:58 1995 Path: ashpoly!cascade!bigsur!stanford!dsilva From: dsilva@stanford.edu (Dong-hyun Silva) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jul24.073358.3061@stanford.edu> Date: Mon, 24 Jul 1995 07:33:58 GMT References: <1995Jul22.225558.6774@cern.ch> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Jul22.225558.6774@cern.ch>, dandersson@cern.ch (Dmitri Andersson) writes: > Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. -- Dong-hyun Silva Practical Peripherals 14.4 @ ISDN 64k bps "We don't sign stars. We build them." From mlindqvist@uu.net Tue Jul 25 11:55:58 1995 Path: ashpoly!cascade!brgate!saturno!uu!mlindqvist From: mlindqvist@uu.net (Marta Lindqvist) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jul25.115558.7006@uu.net> Date: Tue, 25 Jul 1995 11:55:58 GMT References: <1995Jul22.225558.6774@cern.ch> <1995Jul24.073358.3061@stanford.edu> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1995Jul24.073358.3061@stanford.edu>, dsilva@stanford.edu (Dong-hyun Silva) 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. Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. -- Marta Lindqvist | mlindqvist@uu.net PGP Key fingerprint: D17D BB40 8F10 FFD9 "Keep the channels open." From llindqvist@panix.com Thu Jul 27 12:40:58 1995 Path: ashpoly!cascade!mxgate!coyoacan!panix!llindqvist From: llindqvist@panix.com (Lucia Lindqvist) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jul27.124058.7048@panix.com> Date: Thu, 27 Jul 1995 12:40:58 GMT References: <1995Jul22.225558.6774@cern.ch> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1995Jul22.225558.6774@cern.ch>, dandersson@cern.ch (Dmitri Andersson) writes: > Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. > Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- === Lucia Lindqvist === Dept of Electrical Engineering, Public Access Unix of New York "The carrier frequency does not drift by accident."