From rtanaka@tum.de Fri Dec 09 09:10:54 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!tum!rtanaka From: rtanaka@tum.de (Rodrigo Tanaka) Newsgroups: comp.dsp Subject: Question: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Dec09.091054.2810@tum.de> Date: Fri, 09 Dec 1994 09:10:54 GMT Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: WinVN 0.99.5 Lines: 11 Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. The symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20). 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. -- Rodrigo Tanaka "Tape doesn't lie at 02:14. Ears do." Commodore Amiga 500 (1MB OCS) / TOS 4.04 From flarsson@illinois.edu Sun Dec 11 04:57:54 1994 Path: ashpoly!cascade!transat!ukc!fennimore!illinois!flarsson From: flarsson@illinois.edu (Freya Larsson) Newsgroups: comp.dsp Subject: Re: Question: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Dec11.045754.6536@illinois.edu> Date: Sun, 11 Dec 1994 04:57:54 GMT References: <1994Dec09.091054.2810@tum.de> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1994Dec09.091054.2810@tum.de>, rtanaka@tum.de (Rodrigo Tanaka) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. > The symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20). The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! -- Freya Larsson | flarsson@illinois.edu PGP Key fingerprint: 4D27 5C16 F428 8F01 "Keep the channels open." From sgonzalez@demon.co.uk Mon Dec 12 00:05:54 1994 Path: ashpoly!cascade!mxgate!coyoacan!demon!sgonzalez From: sgonzalez@demon.co.uk (Steve González) Newsgroups: comp.dsp Subject: Re: Question: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Dec12.000554.5331@demon.co.uk> Date: Mon, 12 Dec 1994 00:05:54 GMT References: <1994Dec09.091054.2810@tum.de> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Dec09.091054.2810@tum.de>, rtanaka@tum.de (Rodrigo Tanaka) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- === Steve González === Dept of Electrical Engineering, Demon Internet Services UK "Marcus is not one man." From aeriksson@hanse.de Mon Dec 12 17:42:54 1994 Path: ashpoly!cascade!transat!ukc!fennimore!hanse!aeriksson From: aeriksson@hanse.de (Amy Eriksson) Newsgroups: comp.dsp Subject: Re: Question: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Dec12.174254.5206@hanse.de> Date: Mon, 12 Dec 1994 17:42:54 GMT References: <1994Dec09.091054.2810@tum.de> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Dec09.091054.2810@tum.de>, rtanaka@tum.de (Rodrigo Tanaka) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- === Amy Eriksson === Dept of Electrical Engineering, Hanse-Netzwerk Hamburg "Do not worship the copy."