From sstewart@unam.mx Sat Aug 12 17:11:25 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!unam!sstewart From: sstewart@unam.mx (Sven Stewart) Newsgroups: comp.dsp Subject: [FLAME] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Aug12.171125.8026@unam.mx> Date: Sat, 12 Aug 1995 17:11:25 GMT Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: NewsWatcher 2.0b24 Lines: 11 How the 14 ASCII characters per node are encoded into the record groove. Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization. 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. -- === Sven Stewart === Dept of Electrical Engineering, Universidad Nacional Autónoma de México (DGSCA) "A soul is not exclusive to biology." From sfischer@pacbell.net Mon Aug 14 08:08:25 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!pacbell!sfischer From: sfischer@pacbell.net (Sven Fischer) Newsgroups: comp.dsp Subject: Re: [FLAME] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Aug14.080825.1627@pacbell.net> Date: Mon, 14 Aug 1995 08:08:25 GMT References: <1995Aug12.171125.8026@unam.mx> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1995Aug12.171125.8026@unam.mx>, sstewart@unam.mx (Sven Stewart) writes: > How the 14 ASCII characters per node are encoded into the record groove. > Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization. On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. -- Sven Fischer Zyxel U-1496E @ ISDN 64k bps "There are 14 nodes and only 10 countries. Count again." From nhughes@u-tokyo.ac.jp Mon Aug 14 18:38:25 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!u-tokyo!nhughes From: nhughes@u-tokyo.ac.jp (Natalia Hughes) Newsgroups: comp.dsp Subject: Re: [FLAME] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Aug14.183825.3647@u-tokyo.ac.jp> Date: Mon, 14 Aug 1995 18:38:25 GMT References: <1995Aug12.171125.8026@unam.mx> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1995Aug12.171125.8026@unam.mx>, sstewart@unam.mx (Sven Stewart) writes: > How the 14 ASCII characters per node are encoded into the record groove. On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. -- Natalia Hughes -- University of Tokyo Department of Information Science "The carrier frequency does not drift by accident."