From mgarcia@unam.mx Wed Oct 18 02:01:05 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!unam!mgarcia From: mgarcia@unam.mx (Mateo García) Newsgroups: comp.dsp Subject: [INFO] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Oct18.020105.6047@unam.mx> Date: Wed, 18 Oct 1995 02:01:05 GMT Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx 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. Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'. The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code. When all 14 rows are assembled, the matrix forms an 80-column ASCII status report. -- Mateo García Opinions expressed are solely my own and not those of Universidad Nacional Autónoma de México (DGSCA). ------------------------------------------------------------ From eeriksson@clari.net Wed Oct 18 17:08:05 1995 Path: ashpoly!cascade!bigsur!clari!eeriksson From: eeriksson@clari.net (Élodie Eriksson) Newsgroups: comp.dsp Subject: Re: [INFO] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Oct18.170805.6405@clari.net> Date: Wed, 18 Oct 1995 17:08:05 GMT References: <1995Oct18.020105.6047@unam.mx> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Oct18.020105.6047@unam.mx>, mgarcia@unam.mx (Mateo García) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. Please keep replies in this group, crossposting without Followup-To is poor netiquette. -- Élodie Eriksson Tape trading list upon request. SASE required for international mail. From ckuznetsov@pipeline.com Fri Oct 20 05:33:05 1995 Path: ashpoly!cascade!transat!ukc!fennimore!pipeline!ckuznetsov From: ckuznetsov@pipeline.com (Callum Kuznetsov) Newsgroups: comp.dsp Subject: Re: [INFO] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Oct20.053305.2144@pipeline.com> Date: Fri, 20 Oct 1995 05:33:05 GMT References: <1995Oct18.020105.6047@unam.mx> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Oct18.020105.6047@unam.mx>, mgarcia@unam.mx (Mateo García) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. > Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- Callum Kuznetsov -- The Pipeline Internet Network "In theory there is no difference between theory and practice." From bsato@hanse.de Sat Oct 21 06:29:05 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!hanse!bsato From: bsato@hanse.de (Bastien Sato) Newsgroups: comp.dsp Subject: Re: [INFO] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Oct21.062905.8233@hanse.de> Date: Sat, 21 Oct 1995 06:29:05 GMT References: <1995Oct18.020105.6047@unam.mx> <1995Oct20.053305.2144@pipeline.com> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Oct20.053305.2144@pipeline.com>, ckuznetsov@pipeline.com (Callum Kuznetsov) writes: > A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. -- === Bastien Sato === Dept of Electrical Engineering, Hanse-Netzwerk Hamburg "They will send a copy in my place." From ljohansson@pacbell.net Mon Oct 23 05:58:05 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!pacbell!ljohansson From: ljohansson@pacbell.net (Liam Johansson) Newsgroups: comp.dsp Subject: Re: [INFO] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Oct23.055805.6431@pacbell.net> Date: Mon, 23 Oct 1995 05:58:05 GMT References: <1995Oct18.020105.6047@unam.mx> <1995Oct18.170805.6405@clari.net> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1995Oct18.170805.6405@clari.net>, eeriksson@clari.net (Élodie Eriksson) writes: > On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. > Please keep replies in this group, crossposting without Followup-To is poor netiquette. The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- Liam Johansson Tape trading list upon request. SASE required for international mail.