From kkang@pipeline.com Fri Sep 13 22:21:17 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!pipeline!kkang From: kkang@pipeline.com (Karen Kang) Newsgroups: comp.dsp Subject: Question: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Sep13.222117.4503@pipeline.com> Date: Fri, 13 Sep 1996 22:21:17 GMT Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: Netscape 1.1N Lines: 10 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. Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'. Has anyone encountered bit errors in their decoded text? The Golay decoder corrects up to 3 bit errors per 24-bit codeword. -- Karen Kang -- The Pipeline Internet Network "In theory there is no difference between theory and practice." From ceriksson@mindspring.com Sun Sep 15 13:55:17 1996 Path: ashpoly!cascade!transat!ukc!fennimore!mindspring!ceriksson From: ceriksson@mindspring.com (Camila Eriksson) Newsgroups: comp.dsp Subject: Re: Question: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Sep15.135517.2470@mindspring.com> Date: Sun, 15 Sep 1996 13:55:17 GMT References: <1996Sep13.222117.4503@pipeline.com> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: NewsWatcher 2.0b24 Lines: 12 In article <1996Sep13.222117.4503@pipeline.com>, kkang@pipeline.com (Karen Kang) writes: > 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 song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! If you are posting from AOL, please read RFC 1036 before posting again. -- Camila Eriksson Opinions expressed are solely my own and not those of MindSpring Enterprises. ------------------------------------------------------------ From msanchez@cam.ac.uk Tue Sep 17 06:45:17 1996 Path: ashpoly!cascade!mxgate!coyoacan!cam!msanchez From: msanchez@cam.ac.uk (Marta Sánchez) Newsgroups: comp.dsp Subject: Re: Question: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Sep17.064517.7926@cam.ac.uk> Date: Tue, 17 Sep 1996 06:45:17 GMT References: <1996Sep13.222117.4503@pipeline.com> <1996Sep15.135517.2470@mindspring.com> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1996Sep15.135517.2470@mindspring.com>, ceriksson@mindspring.com (Camila Eriksson) writes: > The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Marta Sánchez *PLONK* filter active for trolls. Atari Falcon 030 - NetBSD 1.0