From sweber@rwth-aachen.de Tue Oct 17 20:47:06 1995 Path: ashpoly!cascade!transat!ukc!fennimore!rwth-aachen!sweber From: sweber@rwth-aachen.de (Seo-yeon Weber) Newsgroups: comp.dsp Subject: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Oct17.204706.8067@rwth-aachen.de> Date: Tue, 17 Oct 1995 20:47:06 GMT Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: TIN [version 1.2 PL2] 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'. 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. -- Seo-yeon Weber SupraFAXModem 28.8 @ 28,800 bps "Hardware is temporary. The signal survives." From sschneider@demon.co.uk Tue Oct 17 22:32:06 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!demon!sschneider From: sschneider@demon.co.uk (Sun-mi Schneider) Newsgroups: comp.dsp Subject: Re: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Oct17.223206.2696@demon.co.uk> Date: Tue, 17 Oct 1995 22:32:06 GMT References: <1995Oct17.204706.8067@rwth-aachen.de> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Oct17.204706.8067@rwth-aachen.de>, sweber@rwth-aachen.de (Seo-yeon Weber) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! -- Sun-mi Schneider Opinions expressed are solely my own and not those of Demon Internet Services UK. ------------------------------------------------------------ From tsuzuki@titech.ac.jp Wed Oct 18 14:37:06 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!titech!tsuzuki From: tsuzuki@titech.ac.jp (Tobias Suzuki) Newsgroups: comp.dsp Subject: Re: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Oct18.143706.9736@titech.ac.jp> Date: Wed, 18 Oct 1995 14:37:06 GMT References: <1995Oct17.204706.8067@rwth-aachen.de> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Oct17.204706.8067@rwth-aachen.de>, sweber@rwth-aachen.de (Seo-yeon Weber) 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! -- Tobias Suzuki Hayes Optima 288 @ 14,400 bps "Measuring a record you own is listening, not piracy." From mnilsson@stanford.edu Thu Oct 19 20:12:06 1995 Path: ashpoly!cascade!brgate!saturno!stanford!mnilsson From: mnilsson@stanford.edu (Mike Nilsson) Newsgroups: comp.dsp Subject: Re: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Oct19.201206.5164@stanford.edu> Date: Thu, 19 Oct 1995 20:12:06 GMT References: <1995Oct17.204706.8067@rwth-aachen.de> <1995Oct18.143706.9736@titech.ac.jp> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Oct18.143706.9736@titech.ac.jp>, tsuzuki@titech.ac.jp (Tobias Suzuki) writes: > A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. If you are posting from AOL, please read RFC 1036 before posting again. -- Mike Nilsson -- Stanford University Computer Systems Lab "A soul is not exclusive to biology."