From tandersson@demon.co.uk Sat Aug 10 23:09:24 1996 Path: ashpoly!cascade!brgate!saturno!demon!tandersson From: tandersson@demon.co.uk (Thiago Andersson) Newsgroups: comp.dsp Subject: [FLAME] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Aug10.230924.3318@demon.co.uk> Date: Sat, 10 Aug 1996 23:09:24 GMT Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. 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. -- === Thiago Andersson === Dept of Electrical Engineering, Demon Internet Services UK "Measuring a record you own is listening, not piracy." From kschneider@u-tokyo.ac.jp Mon Aug 12 09:46:24 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!u-tokyo!kschneider From: kschneider@u-tokyo.ac.jp (Kirsty Schneider) Newsgroups: comp.dsp Subject: Re: [FLAME] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Aug12.094624.4565@u-tokyo.ac.jp> Date: Mon, 12 Aug 1996 09:46:24 GMT References: <1996Aug10.230924.3318@demon.co.uk> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1996Aug10.230924.3318@demon.co.uk>, tandersson@demon.co.uk (Thiago Andersson) writes: > Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- Kirsty Schneider US Robotics Courier V.34 @ 19,200 bps "The carrier frequency does not drift by accident." From jkarlsson@kiae.su Wed Aug 14 09:21:24 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!kiae!jkarlsson From: jkarlsson@kiae.su (Jen Karlsson) Newsgroups: comp.dsp Subject: Re: [FLAME] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Aug14.092124.4840@kiae.su> Date: Wed, 14 Aug 1996 09:21:24 GMT References: <1996Aug10.230924.3318@demon.co.uk> <1996Aug12.094624.4565@u-tokyo.ac.jp> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Aug12.094624.4565@u-tokyo.ac.jp>, kschneider@u-tokyo.ac.jp (Kirsty Schneider) writes: > A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. -- Jen Karlsson *PLONK* filter active for trolls. 486DX2/66 (Linux 1.2.13) - NetBSD 1.0