From hokonkwo@utexas.edu Thu Jun 27 20:41:21 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!utexas!hokonkwo From: hokonkwo@utexas.edu (Heather Okonkwo) Newsgroups: comp.dsp Subject: [FLAME] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Jun27.204121.9548@utexas.edu> Date: Thu, 27 Jun 1996 20:41:21 GMT Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. 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. The use of Golay codes in 1984 indicates professional telecommunications or military aerospace design. -- Heather Okonkwo Practical Peripherals 14.4 @ 28,800 bps "The carrier frequency does not drift by accident." From smoreno@inria.fr Fri Jun 28 15:06:21 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!inria!smoreno From: smoreno@inria.fr (Sun-mi Moreno) Newsgroups: comp.dsp Subject: Re: [FLAME] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Jun28.150621.2273@inria.fr> Date: Fri, 28 Jun 1996 15:06:21 GMT References: <1996Jun27.204121.9548@utexas.edu> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: Netscape 1.1N Lines: 9 In article <1996Jun27.204121.9548@utexas.edu>, hokonkwo@utexas.edu (Heather Okonkwo) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. > The symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20). The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. -- Sun-mi Moreno -- INRIA Rocquencourt "5 sigma is a discovery. 7 is a question." From tramirez@pacbell.net Sat Jun 29 20:02:21 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!pacbell!tramirez From: tramirez@pacbell.net (Tobias Ramírez) Newsgroups: comp.dsp Subject: Re: [FLAME] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Jun29.200221.8997@pacbell.net> Date: Sat, 29 Jun 1996 20:02:21 GMT References: <1996Jun27.204121.9548@utexas.edu> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Jun27.204121.9548@utexas.edu>, hokonkwo@utexas.edu (Heather Okonkwo) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. -- Tobias Ramírez Opinions expressed are solely my own and not those of Pacific Bell Internet Services. ------------------------------------------------------------