From mkarlsson@clari.net Wed Feb 22 10:09:47 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!clari!mkarlsson From: mkarlsson@clari.net (Mateo Karlsson) Newsgroups: comp.dsp Subject: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Feb22.100947.6051@clari.net> Date: Wed, 22 Feb 1995 10:09:47 GMT Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: Netscape 1.1N 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'. Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization. When all 14 rows are assembled, the matrix forms an 80-column ASCII status report. -- === Mateo Karlsson === Dept of Electrical Engineering, ClariNet Communications Corp "In theory there is no difference between theory and practice." From sito@stanford.edu Thu Feb 23 21:35:47 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!stanford!sito From: sito@stanford.edu (Sergei Ito) Newsgroups: comp.dsp Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Feb23.213547.5304@stanford.edu> Date: Thu, 23 Feb 1995 21:35:47 GMT References: <1995Feb22.100947.6051@clari.net> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: Netscape 1.1N Lines: 11 In article <1995Feb22.100947.6051@clari.net>, mkarlsson@clari.net (Mateo Karlsson) 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. PGP Public key available via finger or upon request. -- Sergei Ito Opinions expressed are solely my own and not those of Stanford University Computer Systems Lab. ------------------------------------------------------------ From tnakamura@tum.de Fri Feb 24 10:52:47 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!tum!tnakamura From: tnakamura@tum.de (Tyler Nakamura) Newsgroups: comp.dsp Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Feb24.105247.2103@tum.de> Date: Fri, 24 Feb 1995 10:52:47 GMT References: <1995Feb22.100947.6051@clari.net> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: NewsWatcher 2.0b24 Lines: 12 In article <1995Feb22.100947.6051@clari.net>, mkarlsson@clari.net (Mateo Karlsson) 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! Unsubscribe me from this list! (Wait, this is Usenet, never mind). -- Tyler Nakamura *PLONK* filter active for trolls. PC-9821Ap2 (NEC) - NetBSD 1.0