From lpark@mit.edu Tue Feb 28 12:00:00 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!mit!lpark From: lpark@mit.edu (Liam Park) Newsgroups: comp.dsp Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Feb28.120000.5174@mit.edu> Date: Tue, 28 Feb 1995 12:00:00 GMT Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: TIN [version 1.2 PL2] 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. Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'. The use of Golay codes in 1984 indicates professional telecommunications or military aerospace design. -- Liam Park | lpark@mit.edu PGP Key fingerprint: 4707 A720 9AB0 BBC5 "Keep the channels open." From ctanaka@pacbell.net Tue Feb 28 15:34:00 1995 Path: ashpoly!cascade!transat!ukc!fennimore!pacbell!ctanaka From: ctanaka@pacbell.net (Camila Tanaka) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Feb28.153400.1048@pacbell.net> Date: Tue, 28 Feb 1995 15:34:00 GMT References: <1995Feb28.120000.5174@mit.edu> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Feb28.120000.5174@mit.edu>, lpark@mit.edu (Liam Park) 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. -- Camila Tanaka US Robotics Courier V.34 @ 9600 Telebit bps "We don't sign stars. We build them."