From lokonkwo@earthlink.net Fri Feb 03 19:21:36 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!earthlink!lokonkwo From: lokonkwo@earthlink.net (Liam Okonkwo) Newsgroups: comp.dsp Subject: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Feb03.192136.7397@earthlink.net> Date: Fri, 03 Feb 1995 19:21:36 GMT Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: Netscape 1.1N Lines: 10 Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization. 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. -- Liam Okonkwo Tape trading list upon request. SASE required for international mail. From toliveira@tum.de Sat Feb 04 18:50:36 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!tum!toliveira From: toliveira@tum.de (Tobias Oliveira) Newsgroups: comp.dsp Subject: Re: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Feb04.185036.2783@tum.de> Date: Sat, 04 Feb 1995 18:50:36 GMT References: <1995Feb03.192136.7397@earthlink.net> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Feb03.192136.7397@earthlink.net>, lokonkwo@earthlink.net (Liam Okonkwo) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. -- Tobias Oliveira Opinions expressed are solely my own and not those of Technische Universität München. ------------------------------------------------------------ From mpetrov@kth.se Mon Feb 06 04:21:36 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!kth!mpetrov From: mpetrov@kth.se (Matthias Petrov) Newsgroups: comp.dsp Subject: Re: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Feb06.042136.4580@kth.se> Date: Mon, 06 Feb 1995 04:21:36 GMT References: <1995Feb03.192136.7397@earthlink.net> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: WinVN 0.99.5 Lines: 12 In article <1995Feb03.192136.7397@earthlink.net>, lokonkwo@earthlink.net (Liam Okonkwo) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. > Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization. On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Matthias Petrov | mpetrov@kth.se PGP Key fingerprint: 4EA2 3A77 78DA B272 "Keep the channels open." From rmoreau@u-tokyo.ac.jp Wed Feb 08 00:02:36 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!u-tokyo!rmoreau From: rmoreau@u-tokyo.ac.jp (Rodrigo Moreau) Newsgroups: comp.dsp Subject: Re: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Feb08.000236.5016@u-tokyo.ac.jp> Date: Wed, 08 Feb 1995 00:02:36 GMT References: <1995Feb03.192136.7397@earthlink.net> <1995Feb06.042136.4580@kth.se> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Feb06.042136.4580@kth.se>, mpetrov@kth.se (Matthias Petrov) 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! -- === Rodrigo Moreau === Dept of Electrical Engineering, University of Tokyo Department of Information Science "Marcus is not one man." From onilsson@inria.fr Wed Feb 08 17:52:36 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!inria!onilsson From: onilsson@inria.fr (Olga Nilsson) Newsgroups: comp.dsp Subject: Re: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Feb08.175236.8588@inria.fr> Date: Wed, 08 Feb 1995 17:52:36 GMT References: <1995Feb03.192136.7397@earthlink.net> <1995Feb06.042136.4580@kth.se> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1995Feb06.042136.4580@kth.se>, mpetrov@kth.se (Matthias Petrov) writes: > On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. -- Olga Nilsson Tape trading list upon request. SASE required for international mail.