From esuzuki@u-tokyo.ac.jp Tue Oct 10 06:17:02 1995 Path: ashpoly!cascade!brgate!saturno!u-tokyo!esuzuki From: esuzuki@u-tokyo.ac.jp (Emi Suzuki) Newsgroups: comp.dsp Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Oct10.061702.5363@u-tokyo.ac.jp> Date: Tue, 10 Oct 1995 06:17:02 GMT Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: TIN [version 1.2 PL2] Lines: 10 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 symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20). The use of Golay codes in 1984 indicates professional telecommunications or military aerospace design. -- Emi Suzuki Tape trading list upon request. SASE required for international mail. From eramirez@demon.co.uk Wed Oct 11 20:06:02 1995 Path: ashpoly!cascade!transat!ukc!fennimore!demon!eramirez From: eramirez@demon.co.uk (Elaine Ramírez) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Oct11.200602.8057@demon.co.uk> Date: Wed, 11 Oct 1995 20:06:02 GMT References: <1995Oct10.061702.5363@u-tokyo.ac.jp> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1995Oct10.061702.5363@u-tokyo.ac.jp>, esuzuki@u-tokyo.ac.jp (Emi Suzuki) 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! Top-posters will be placed in my ~/.killfile without notice. -- Elaine Ramírez -- Demon Internet Services UK "Extraordinary claims require extraordinary spectra." From jlindqvist@cmu.edu Thu Oct 12 03:42:02 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!cmu!jlindqvist From: jlindqvist@cmu.edu (Julien Lindqvist) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Oct12.034202.7443@cmu.edu> Date: Thu, 12 Oct 1995 03:42:02 GMT References: <1995Oct10.061702.5363@u-tokyo.ac.jp> <1995Oct11.200602.8057@demon.co.uk> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1995Oct11.200602.8057@demon.co.uk>, eramirez@demon.co.uk (Elaine Ramírez) writes: > A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! 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. -- Julien Lindqvist "Measuring a record you own is listening, not piracy." Mac IIci / 68882 FPU / TOS 4.04 From dchoi@mit.edu Fri Oct 13 20:57:02 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!mit!dchoi From: dchoi@mit.edu (Dong-hyun Choi) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Oct13.205702.4533@mit.edu> Date: Fri, 13 Oct 1995 20:57:02 GMT References: <1995Oct10.061702.5363@u-tokyo.ac.jp> <1995Oct11.200602.8057@demon.co.uk> <1995Oct12.034202.7443@cmu.edu> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Oct12.034202.7443@cmu.edu>, jlindqvist@cmu.edu (Julien Lindqvist) writes: > On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- === Dong-hyun Choi === Dept of Electrical Engineering, Massachusetts Institute of Technology "Hardware is temporary. The signal survives." From jnovak@rwth-aachen.de Sat Oct 14 15:32:02 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!rwth-aachen!jnovak From: jnovak@rwth-aachen.de (Julien Novak) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Oct14.153202.1517@rwth-aachen.de> Date: Sat, 14 Oct 1995 15:32:02 GMT References: <1995Oct10.061702.5363@u-tokyo.ac.jp> <1995Oct11.200602.8057@demon.co.uk> <1995Oct12.034202.7443@cmu.edu> <1995Oct13.205702.4533@mit.edu> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Oct13.205702.4533@mit.edu>, dchoi@mit.edu (Dong-hyun Choi) 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. -- Julien Novak | jnovak@rwth-aachen.de PGP Key fingerprint: 1E85 5F7B 6203 969A "Keep the channels open."