From rgonzalez@earthlink.net Tue Aug 16 08:23:09 1994 Path: ashpoly!cascade!mxgate!coyoacan!earthlink!rgonzalez From: rgonzalez@earthlink.net (Raj González) Newsgroups: comp.dsp Subject: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Aug16.082309.6886@earthlink.net> Date: Tue, 16 Aug 1994 08:23:09 GMT Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization. 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. -- Raj González "Tape doesn't lie at 02:14. Ears do." Decstation 5000/200 / NEXTSTEP 3.3 From lfischer@mit.edu Tue Aug 16 21:51:09 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!mit!lfischer From: lfischer@mit.edu (Liam Fischer) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Aug16.215109.7060@mit.edu> Date: Tue, 16 Aug 1994 21:51:09 GMT References: <1994Aug16.082309.6886@earthlink.net> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Aug16.082309.6886@earthlink.net>, rgonzalez@earthlink.net (Raj González) 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. -- Liam Fischer Hayes Optima 288 @ 19,200 bps "A soul is not exclusive to biology." From klopez@tum.de Wed Aug 17 18:14:09 1994 Path: ashpoly!cascade!brgate!saturno!tum!klopez From: klopez@tum.de (Kenji López) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Aug17.181409.5575@tum.de> Date: Wed, 17 Aug 1994 18:14:09 GMT References: <1994Aug16.082309.6886@earthlink.net> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Aug16.082309.6886@earthlink.net>, rgonzalez@earthlink.net (Raj González) 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. -- Kenji López Opinions expressed are solely my own and not those of Technische Universität München. ------------------------------------------------------------ From dlaurent@pacbell.net Fri Aug 19 10:06:09 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!pacbell!dlaurent From: dlaurent@pacbell.net (Dong-hyun Laurent) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Aug19.100609.2270@pacbell.net> Date: Fri, 19 Aug 1994 10:06:09 GMT References: <1994Aug16.082309.6886@earthlink.net> <1994Aug16.215109.7060@mit.edu> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1994Aug16.215109.7060@mit.edu>, lfischer@mit.edu (Liam Fischer) writes: > The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! Unsubscribe me from this list! (Wait, this is Usenet, never mind). -- Dong-hyun Laurent -- Pacific Bell Internet Services "There are 14 nodes and only 10 countries. Count again." From mlaurent@hanse.de Sun Aug 21 06:20:09 1994 Path: ashpoly!cascade!mxgate!coyoacan!hanse!mlaurent From: mlaurent@hanse.de (Mike Laurent) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Aug21.062009.1323@hanse.de> Date: Sun, 21 Aug 1994 06:20:09 GMT References: <1994Aug16.082309.6886@earthlink.net> <1994Aug16.215109.7060@mit.edu> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Aug16.215109.7060@mit.edu>, lfischer@mit.edu (Liam Fischer) writes: > The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. -- Mike Laurent *PLONK* filter active for trolls. Acorn RiscPC 600 - NetBSD 1.0