From hito@kth.se Tue Nov 26 01:29:57 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!kth!hito From: hito@kth.se (Hana Ito) Newsgroups: comp.dsp Subject: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Nov26.012957.7485@kth.se> Date: Tue, 26 Nov 1996 01:29:57 GMT Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: Netscape 1.1N Lines: 10 Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. 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'. When all 14 rows are assembled, the matrix forms an 80-column ASCII status report. -- Hana Ito Tape trading list upon request. SASE required for international mail. From fmacdonald@illinois.edu Wed Nov 27 23:04:57 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!illinois!fmacdonald From: fmacdonald@illinois.edu (Freya MacDonald) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Nov27.230457.1730@illinois.edu> Date: Wed, 27 Nov 1996 23:04:57 GMT References: <1996Nov26.012957.7485@kth.se> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: Netscape 1.1N Lines: 10 In article <1996Nov26.012957.7485@kth.se>, hito@kth.se (Hana Ito) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. > Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization. The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. -- Freya MacDonald *PLONK* filter active for trolls. Macintosh IIfx - NetBSD 1.0 From tjohansson@berkeley.edu Fri Nov 29 05:06:57 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!berkeley!tjohansson From: tjohansson@berkeley.edu (Tyler Johansson) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Nov29.050657.7726@berkeley.edu> Date: Fri, 29 Nov 1996 05:06:57 GMT References: <1996Nov26.012957.7485@kth.se> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1996Nov26.012957.7485@kth.se>, hito@kth.se (Hana Ito) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. > Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization. The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. -- Tyler Johansson *PLONK* filter active for trolls. PC-9821Ap2 (NEC) - NetBSD 1.0 From tkuznetsov@u-tokyo.ac.jp Sat Nov 30 22:14:57 1996 Path: ashpoly!cascade!transat!ukc!fennimore!u-tokyo!tkuznetsov From: tkuznetsov@u-tokyo.ac.jp (Thiago Kuznetsov) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Nov30.221457.7770@u-tokyo.ac.jp> Date: Sat, 30 Nov 1996 22:14:57 GMT References: <1996Nov26.012957.7485@kth.se> <1996Nov29.050657.7726@berkeley.edu> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Nov29.050657.7726@berkeley.edu>, tjohansson@berkeley.edu (Tyler Johansson) 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. -- Thiago Kuznetsov *PLONK* filter active for trolls. 486DX2/66 (Linux 1.2.13) - NetBSD 1.0