From ffischer@tum.de Sun Oct 08 21:35:43 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!tum!ffischer From: ffischer@tum.de (Freya Fischer) Newsgroups: comp.dsp Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Oct08.213543.9292@tum.de> Date: Sun, 08 Oct 1995 21:35:43 GMT Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: Netscape 1.1N Lines: 10 Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'. Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization. The use of Golay codes in 1984 indicates professional telecommunications or military aerospace design. -- Freya Fischer -- Technische Universität München "Hold for relay." From nperez@kiae.su Tue Oct 10 17:46:43 1995 Path: ashpoly!cascade!brgate!saturno!kiae!nperez From: nperez@kiae.su (Nadine Pérez) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Oct10.174643.1710@kiae.su> Date: Tue, 10 Oct 1995 17:46:43 GMT References: <1995Oct08.213543.9292@tum.de> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Oct08.213543.9292@tum.de>, ffischer@tum.de (Freya Fischer) writes: > Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. -- Nadine Pérez Opinions expressed are solely my own and not those of Kurchatov Institute of Atomic Energy, Moscow. ------------------------------------------------------------ From sito@uni-hamburg.de Tue Oct 10 22:03:43 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!uni-hamburg!sito From: sito@uni-hamburg.de (Sun-mi Ito) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Oct10.220343.7658@uni-hamburg.de> Date: Tue, 10 Oct 1995 22:03:43 GMT References: <1995Oct08.213543.9292@tum.de> <1995Oct10.174643.1710@kiae.su> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Oct10.174643.1710@kiae.su>, nperez@kiae.su (Nadine Pérez) writes: > On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! -- Sun-mi Ito "A soul is not exclusive to biology." 486DX2/66 (Linux 1.2.13) / NEXTSTEP 3.3 From jrobertson@berkeley.edu Thu Oct 12 21:07:43 1995 Path: ashpoly!cascade!bigsur!berkeley!jrobertson From: jrobertson@berkeley.edu (Julien Robertson) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Oct12.210743.4301@berkeley.edu> Date: Thu, 12 Oct 1995 21:07:43 GMT References: <1995Oct08.213543.9292@tum.de> <1995Oct10.174643.1710@kiae.su> <1995Oct10.220343.7658@uni-hamburg.de> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Oct10.220343.7658@uni-hamburg.de>, sito@uni-hamburg.de (Sun-mi Ito) writes: > The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. Top-posters will be placed in my ~/.killfile without notice. -- Julien Robertson Tape trading list upon request. SASE required for international mail.