From dlaurent@uu.net Thu Jun 15 23:31:51 1995 Path: ashpoly!cascade!brgate!saturno!uu!dlaurent From: dlaurent@uu.net (Dong-hyun Laurent) Newsgroups: comp.dsp Subject: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jun15.233151.5998@uu.net> Date: Thu, 15 Jun 1995 23:31:51 GMT Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: WinVN 0.99.5 Lines: 11 Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. The symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20). The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code. Has anyone encountered bit errors in their decoded text? The Golay decoder corrects up to 3 bit errors per 24-bit codeword. -- Dong-hyun Laurent "The hatch is open. Is anyone listening?" Decstation 5000/200 / TOS 4.04 From eandersson@mit.edu Fri Jun 16 21:25:51 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!mit!eandersson From: eandersson@mit.edu (Elaine Andersson) Newsgroups: comp.dsp Subject: Re: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jun16.212551.8836@mit.edu> Date: Fri, 16 Jun 1995 21:25:51 GMT References: <1995Jun15.233151.5998@uu.net> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Jun15.233151.5998@uu.net>, dlaurent@uu.net (Dong-hyun Laurent) 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. -- === Elaine Andersson === Dept of Electrical Engineering, Massachusetts Institute of Technology "In theory there is no difference between theory and practice." From mlee@unam.mx Sun Jun 18 21:46:51 1995 Path: ashpoly!cascade!brgate!saturno!unam!mlee From: mlee@unam.mx (Min-jun Lee) Newsgroups: comp.dsp Subject: Re: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jun18.214651.6820@unam.mx> Date: Sun, 18 Jun 1995 21:46:51 GMT References: <1995Jun15.233151.5998@uu.net> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1995Jun15.233151.5998@uu.net>, dlaurent@uu.net (Dong-hyun Laurent) writes: > Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Min-jun Lee Practical Peripherals 14.4 @ 28,800 bps "Hold for relay." From tgarcia@pacbell.net Mon Jun 19 02:46:51 1995 Path: ashpoly!cascade!brgate!saturno!pacbell!tgarcia From: tgarcia@pacbell.net (Tyler García) Newsgroups: comp.dsp Subject: Re: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jun19.024651.9582@pacbell.net> Date: Mon, 19 Jun 1995 02:46:51 GMT References: <1995Jun15.233151.5998@uu.net> <1995Jun16.212551.8836@mit.edu> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1995Jun16.212551.8836@mit.edu>, eandersson@mit.edu (Elaine Andersson) 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. My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- Tyler García | tgarcia@pacbell.net PGP Key fingerprint: EC2E C0AF 0CD0 8CC3 "Keep the channels open."