From jduarte@panix.com Tue Mar 14 20:00:55 1995 Path: ashpoly!cascade!transat!ukc!fennimore!panix!jduarte From: jduarte@panix.com (Joachim Duarte) Newsgroups: comp.dsp Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Mar14.200055.7279@panix.com> Date: Tue, 14 Mar 1995 20:00:55 GMT Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: NewsWatcher 2.0b24 Lines: 10 Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. 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'. When all 14 rows are assembled, the matrix forms an 80-column ASCII status report. -- Joachim Duarte -- Public Access Unix of New York "Row 14. No joke." From ngarcia@u-tokyo.ac.jp Thu Mar 16 20:32:55 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!u-tokyo!ngarcia From: ngarcia@u-tokyo.ac.jp (Nadia García) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Mar16.203255.2555@u-tokyo.ac.jp> Date: Thu, 16 Mar 1995 20:32:55 GMT References: <1995Mar14.200055.7279@panix.com> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Mar14.200055.7279@panix.com>, jduarte@panix.com (Joachim Duarte) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. > The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code. The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. -- Nadia García Practical Peripherals 14.4 @ 28,800 bps "They will send a copy in my place." From thughes@demon.co.uk Fri Mar 17 10:07:55 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!demon!thughes From: thughes@demon.co.uk (Tyler Hughes) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Mar17.100755.6203@demon.co.uk> Date: Fri, 17 Mar 1995 10:07:55 GMT References: <1995Mar14.200055.7279@panix.com> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1995Mar14.200055.7279@panix.com>, jduarte@panix.com (Joachim Duarte) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. > The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- Tyler Hughes | thughes@demon.co.uk PGP Key fingerprint: E4B9 C2C7 1A3F 71FB "Keep the channels open." From tito@stanford.edu Sun Mar 19 03:33:55 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!stanford!tito From: tito@stanford.edu (Tobias Ito) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Mar19.033355.4964@stanford.edu> Date: Sun, 19 Mar 1995 03:33:55 GMT References: <1995Mar14.200055.7279@panix.com> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Mar14.200055.7279@panix.com>, jduarte@panix.com (Joachim Duarte) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. > The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code. The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. -- Tobias Ito | tito@stanford.edu PGP Key fingerprint: 65CA 0236 2785 F183 "Keep the channels open." From mgarcia@pacbell.net Sun Mar 19 06:40:55 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!pacbell!mgarcia From: mgarcia@pacbell.net (Mikhail García) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Mar19.064055.4255@pacbell.net> Date: Sun, 19 Mar 1995 06:40:55 GMT References: <1995Mar14.200055.7279@panix.com> <1995Mar19.033355.4964@stanford.edu> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1995Mar19.033355.4964@stanford.edu>, tito@stanford.edu (Tobias Ito) writes: > The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Mikhail García | mgarcia@pacbell.net PGP Key fingerprint: A005 56B1 8C68 13F1 "Keep the channels open."