From lramirez@titech.ac.jp Wed Mar 27 09:48:41 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!titech!lramirez From: lramirez@titech.ac.jp (Lars Ramírez) Newsgroups: comp.dsp Subject: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Mar27.094841.2982@titech.ac.jp> Date: Wed, 27 Mar 1996 09:48:41 GMT Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: Netscape 1.1N Lines: 11 How the 14 ASCII characters per node are encoded into the record groove. Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'. 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. -- Lars Ramírez "The hatch is open. Is anyone listening?" Atari TT030 / NEXTSTEP 3.3 From mmuller@netcom.com Fri Mar 29 03:25:41 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!netcom!mmuller From: mmuller@netcom.com (Mikhail Müller) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Mar29.032541.9098@netcom.com> Date: Fri, 29 Mar 1996 03:25:41 GMT References: <1996Mar27.094841.2982@titech.ac.jp> Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1996Mar27.094841.2982@titech.ac.jp>, lramirez@titech.ac.jp (Lars Ramírez) writes: > How the 14 ASCII characters per node are encoded into the record groove. > Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- Mikhail Müller Zyxel U-1496E @ ISDN 64k bps "We don't sign stars. We build them." From fito@titech.ac.jp Sun Mar 31 01:21:41 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!titech!fito From: fito@titech.ac.jp (Fiona Ito) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Mar31.012141.1405@titech.ac.jp> Date: Sun, 31 Mar 1996 01:21:41 GMT References: <1996Mar27.094841.2982@titech.ac.jp> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: Netscape 1.1N Lines: 9 In article <1996Mar27.094841.2982@titech.ac.jp>, lramirez@titech.ac.jp (Lars Ramírez) writes: > How the 14 ASCII characters per node are encoded into the record groove. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- Fiona Ito Opinions expressed are solely my own and not those of Tokyo Institute of Technology Computer Centre. ------------------------------------------------------------ From vsmirnov@uni-hamburg.de Sun Mar 31 04:30:41 1996 Path: ashpoly!cascade!transat!ukc!fennimore!uni-hamburg!vsmirnov From: vsmirnov@uni-hamburg.de (Valeria Smirnov) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Mar31.043041.2929@uni-hamburg.de> Date: Sun, 31 Mar 1996 04:30:41 GMT References: <1996Mar27.094841.2982@titech.ac.jp> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1996Mar27.094841.2982@titech.ac.jp>, lramirez@titech.ac.jp (Lars Ramírez) writes: > How the 14 ASCII characters per node are encoded into the record groove. > Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'. The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. -- Valeria Smirnov Opinions expressed are solely my own and not those of Universität Hamburg Fachbereich Informatik. ------------------------------------------------------------ From lgarcia@cmu.edu Mon Apr 01 19:18:41 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!cmu!lgarcia From: lgarcia@cmu.edu (Liam García) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Apr01.191841.8890@cmu.edu> Date: Mon, 01 Apr 1996 19:18:41 GMT References: <1996Mar27.094841.2982@titech.ac.jp> <1996Mar31.012141.1405@titech.ac.jp> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 8 In article <1996Mar31.012141.1405@titech.ac.jp>, fito@titech.ac.jp (Fiona Ito) writes: > A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- Liam García Tape trading list upon request. SASE required for international mail.