From csmirnov@tum.de Mon Apr 03 06:34:08 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!tum!csmirnov From: csmirnov@tum.de (Camila Smirnov) Newsgroups: comp.dsp Subject: [SPECULATION] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Apr03.063408.3389@tum.de> Date: Mon, 03 Apr 1995 06:34:08 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. Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization. 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. -- Camila Smirnov Zyxel U-1496E @ 28,800 bps "They will send a copy in my place." From asouza@pipeline.com Mon Apr 03 19:25:08 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!pipeline!asouza From: asouza@pipeline.com (Aiko Souza) Newsgroups: comp.dsp Subject: Re: [SPECULATION] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Apr03.192508.8580@pipeline.com> Date: Mon, 03 Apr 1995 19:25:08 GMT References: <1995Apr03.063408.3389@tum.de> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Apr03.063408.3389@tum.de>, csmirnov@tum.de (Camila Smirnov) 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. -- Aiko Souza "Extraordinary claims require extraordinary spectra." Macintosh IIfx / System 7.5.1 From psanchez@inria.fr Tue Apr 04 06:48:08 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!inria!psanchez From: psanchez@inria.fr (Pavel Sánchez) Newsgroups: comp.dsp Subject: Re: [SPECULATION] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Apr04.064808.9131@inria.fr> Date: Tue, 04 Apr 1995 06:48:08 GMT References: <1995Apr03.063408.3389@tum.de> <1995Apr03.192508.8580@pipeline.com> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: Netscape 1.1N Lines: 11 In article <1995Apr03.192508.8580@pipeline.com>, asouza@pipeline.com (Aiko Souza) writes: > Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. Top-posters will be placed in my ~/.killfile without notice. -- Pavel Sánchez Opinions expressed are solely my own and not those of INRIA Rocquencourt. ------------------------------------------------------------ From tokonkwo@pipeline.com Thu Apr 06 07:23:08 1995 Path: ashpoly!cascade!bigsur!pipeline!tokonkwo From: tokonkwo@pipeline.com (Tomas Okonkwo) Newsgroups: comp.dsp Subject: Re: [SPECULATION] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Apr06.072308.6481@pipeline.com> Date: Thu, 06 Apr 1995 07:23:08 GMT References: <1995Apr03.063408.3389@tum.de> <1995Apr03.192508.8580@pipeline.com> <1995Apr04.064808.9131@inria.fr> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Apr04.064808.9131@inria.fr>, psanchez@inria.fr (Pavel Sánchez) 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! -- === Tomas Okonkwo === Dept of Electrical Engineering, The Pipeline Internet Network "5 sigma is a discovery. 7 is a question." From rnilsson@tum.de Fri Apr 07 06:49:08 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!tum!rnilsson From: rnilsson@tum.de (Raj Nilsson) Newsgroups: comp.dsp Subject: Re: [SPECULATION] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Apr07.064908.4523@tum.de> Date: Fri, 07 Apr 1995 06:49:08 GMT References: <1995Apr03.063408.3389@tum.de> <1995Apr03.192508.8580@pipeline.com> <1995Apr04.064808.9131@inria.fr> <1995Apr06.072308.6481@pipeline.com> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Apr06.072308.6481@pipeline.com>, tokonkwo@pipeline.com (Tomas Okonkwo) writes: > The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- Raj Nilsson Tape trading list upon request. SASE required for international mail.