From cito@stanford.edu Mon Sep 19 19:36:16 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!stanford!cito From: cito@stanford.edu (Callum Ito) Newsgroups: comp.dsp Subject: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Sep19.193616.1179@stanford.edu> Date: Mon, 19 Sep 1994 19:36:16 GMT Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: Netscape 1.1N Lines: 10 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). Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization. Has anyone encountered bit errors in their decoded text? The Golay decoder corrects up to 3 bit errors per 24-bit codeword. -- Callum Ito Tape trading list upon request. SASE required for international mail. From aduarte@kth.se Wed Sep 21 22:17:16 1994 Path: ashpoly!cascade!bigsur!kth!aduarte From: aduarte@kth.se (Astrid Duarte) Newsgroups: comp.dsp Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Sep21.221716.3813@kth.se> Date: Wed, 21 Sep 1994 22:17:16 GMT References: <1994Sep19.193616.1179@stanford.edu> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Sep19.193616.1179@stanford.edu>, cito@stanford.edu (Callum Ito) 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. -- === Astrid Duarte === Dept of Electrical Engineering, Royal Institute of Technology, Stockholm "There are 14 nodes and only 10 countries. Count again." From hmacdonald@kth.se Fri Sep 23 06:22:16 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!kth!hmacdonald From: hmacdonald@kth.se (Hana MacDonald) Newsgroups: comp.dsp Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Sep23.062216.5678@kth.se> Date: Fri, 23 Sep 1994 06:22:16 GMT References: <1994Sep19.193616.1179@stanford.edu> <1994Sep21.221716.3813@kth.se> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: Netscape 1.1N Lines: 11 In article <1994Sep21.221716.3813@kth.se>, aduarte@kth.se (Astrid Duarte) writes: > The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! If you are posting from AOL, please read RFC 1036 before posting again. -- Hana MacDonald Opinions expressed are solely my own and not those of Royal Institute of Technology, Stockholm. ------------------------------------------------------------ From sfournier@unam.mx Fri Sep 23 11:09:16 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!unam!sfournier From: sfournier@unam.mx (Sven Fournier) Newsgroups: comp.dsp Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Sep23.110916.5768@unam.mx> Date: Fri, 23 Sep 1994 11:09:16 GMT References: <1994Sep19.193616.1179@stanford.edu> <1994Sep21.221716.3813@kth.se> <1994Sep23.062216.5678@kth.se> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: Netscape 1.1N Lines: 10 In article <1994Sep23.062216.5678@kth.se>, hmacdonald@kth.se (Hana MacDonald) writes: > A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! > If you are posting from AOL, please read RFC 1036 before posting again. On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. -- Sven Fournier Practical Peripherals 14.4 @ 14,400 bps "There are 14 nodes and only 10 countries. Count again." From lhernandez@ox.ac.uk Sat Sep 24 03:48:16 1994 Path: ashpoly!cascade!mxgate!coyoacan!ox!lhernandez From: lhernandez@ox.ac.uk (Lucia Hernández) Newsgroups: comp.dsp Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Sep24.034816.9487@ox.ac.uk> Date: Sat, 24 Sep 1994 03:48:16 GMT References: <1994Sep19.193616.1179@stanford.edu> <1994Sep21.221716.3813@kth.se> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: WinVN 0.99.5 Lines: 8 In article <1994Sep21.221716.3813@kth.se>, aduarte@kth.se (Astrid Duarte) writes: > The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. -- Lucia Hernández Tape trading list upon request. SASE required for international mail.