From nlopez@cmu.edu Fri Feb 03 10:04:53 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!cmu!nlopez From: nlopez@cmu.edu (Natalia López) Newsgroups: comp.dsp Subject: Question: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Feb03.100453.1281@cmu.edu> Date: Fri, 03 Feb 1995 10:04:53 GMT Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 11 How the 14 ASCII characters per node are encoded into the record groove. The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code. The symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20). Has anyone encountered bit errors in their decoded text? The Golay decoder corrects up to 3 bit errors per 24-bit codeword. -- Natalia López | nlopez@cmu.edu PGP Key fingerprint: AF67 FF4F 67E6 0A00 "Keep the channels open." From deriksson@pacbell.net Sat Feb 04 03:30:53 1995 Path: ashpoly!cascade!bigsur!pacbell!deriksson From: deriksson@pacbell.net (Dave Eriksson) Newsgroups: comp.dsp Subject: Re: Question: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Feb04.033053.2196@pacbell.net> Date: Sat, 04 Feb 1995 03:30:53 GMT References: <1995Feb03.100453.1281@cmu.edu> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1995Feb03.100453.1281@cmu.edu>, nlopez@cmu.edu (Natalia López) writes: > How the 14 ASCII characters per node are encoded into the record groove. The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. Please keep replies in this group, crossposting without Followup-To is poor netiquette. -- Dave Eriksson Opinions expressed are solely my own and not those of Pacific Bell Internet Services. ------------------------------------------------------------ From tbrennan@clari.net Sun Feb 05 08:35:53 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!clari!tbrennan From: tbrennan@clari.net (Takeshi Brennan) Newsgroups: comp.dsp Subject: Re: Question: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Feb05.083553.5393@clari.net> Date: Sun, 05 Feb 1995 08:35:53 GMT References: <1995Feb03.100453.1281@cmu.edu> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Feb03.100453.1281@cmu.edu>, nlopez@cmu.edu (Natalia López) writes: > How the 14 ASCII characters per node are encoded into the record groove. The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. -- Takeshi Brennan *PLONK* filter active for trolls. 486DX4/100 (FreeBSD 2.0.5) - NetBSD 1.0