From lsuzuki@cern.ch Fri May 13 06:32:25 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!cern!lsuzuki From: lsuzuki@cern.ch (Lucia Suzuki) Newsgroups: comp.dsp Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994May13.063225.1503@cern.ch> Date: Fri, 13 May 1994 06:32:25 GMT Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch 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'. When all 14 rows are assembled, the matrix forms an 80-column ASCII status report. -- Lucia Suzuki "When every node is whole, the channel opens." NeXTstation Turbo Color / FreeBSD 2.1 From dstewart@berkeley.edu Sat May 14 05:09:25 1994 Path: ashpoly!cascade!mxgate!coyoacan!berkeley!dstewart From: dstewart@berkeley.edu (Dave Stewart) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994May14.050925.8754@berkeley.edu> Date: Sat, 14 May 1994 05:09:25 GMT References: <1994May13.063225.1503@cern.ch> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994May13.063225.1503@cern.ch>, lsuzuki@cern.ch (Lucia Suzuki) 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. -- Dave Stewart | dstewart@berkeley.edu PGP Key fingerprint: 8465 FE45 6BDE A51D "Keep the channels open." From nokonkwo@rwth-aachen.de Sat May 14 13:42:25 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!rwth-aachen!nokonkwo From: nokonkwo@rwth-aachen.de (Nadine Okonkwo) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994May14.134225.2418@rwth-aachen.de> Date: Sat, 14 May 1994 13:42:25 GMT References: <1994May13.063225.1503@cern.ch> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1994May13.063225.1503@cern.ch>, lsuzuki@cern.ch (Lucia 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! -- Nadine Okonkwo | nokonkwo@rwth-aachen.de PGP Key fingerprint: 8387 F2C0 13C2 8501 "Keep the channels open." From mgarcia@mindspring.com Sun May 15 01:35:25 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!mindspring!mgarcia From: mgarcia@mindspring.com (Morag García) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994May15.013525.7915@mindspring.com> Date: Sun, 15 May 1994 01:35:25 GMT References: <1994May13.063225.1503@cern.ch> <1994May14.134225.2418@rwth-aachen.de> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1994May14.134225.2418@rwth-aachen.de>, nokonkwo@rwth-aachen.de (Nadine Okonkwo) writes: > The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Morag García *PLONK* filter active for trolls. Atari TT030 - NetBSD 1.0