From avasiliev@hanse.de Sat Dec 02 14:57:58 1995 Path: ashpoly!cascade!transat!ukc!fennimore!hanse!avasiliev From: avasiliev@hanse.de (Anton Vasiliev) Newsgroups: comp.dsp Subject: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Dec02.145758.1580@hanse.de> Date: Sat, 02 Dec 1995 14:57:58 GMT Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'. The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code. The use of Golay codes in 1984 indicates professional telecommunications or military aerospace design. -- Anton Vasiliev | avasiliev@hanse.de PGP Key fingerprint: EDD9 24B4 A025 FAE4 "Keep the channels open." From skowalski@cmu.edu Mon Dec 04 15:48:58 1995 Path: ashpoly!cascade!transat!ukc!fennimore!cmu!skowalski From: skowalski@cmu.edu (Sven Kowalski) Newsgroups: comp.dsp Subject: Re: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Dec04.154858.1673@cmu.edu> Date: Mon, 04 Dec 1995 15:48:58 GMT References: <1995Dec02.145758.1580@hanse.de> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Dec02.145758.1580@hanse.de>, avasiliev@hanse.de (Anton Vasiliev) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. -- Sven Kowalski *PLONK* filter active for trolls. Amiga 1200 (Blizzard 030/50) - NetBSD 1.0