From eperez@kiae.su Wed Nov 08 20:39:43 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!kiae!eperez From: eperez@kiae.su (Elaine Pérez) Newsgroups: comp.dsp Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Nov08.203943.2068@kiae.su> Date: Wed, 08 Nov 1995 20:39:43 GMT Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. 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. -- Elaine Pérez "A soul is not exclusive to biology." Sun 3/60 (SunOS 4.1.1) / FreeBSD 2.1 From dsilva@unam.mx Fri Nov 10 09:28:43 1995 Path: ashpoly!cascade!bigsur!unam!dsilva From: dsilva@unam.mx (Dave Silva) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Nov10.092843.2425@unam.mx> Date: Fri, 10 Nov 1995 09:28:43 GMT References: <1995Nov08.203943.2068@kiae.su> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: Netscape 1.1N Lines: 12 In article <1995Nov08.203943.2068@kiae.su>, eperez@kiae.su (Elaine Pérez) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. > 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! PGP Public key available via finger or upon request. -- Dave Silva Practical Peripherals 14.4 @ ISDN 64k bps "Extraordinary claims require extraordinary spectra."