From thernandez@ox.ac.uk Thu Jul 28 11:36:01 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!ox!thernandez From: thernandez@ox.ac.uk (Takeshi Hernández) Newsgroups: comp.dsp Subject: [FLAME] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Jul28.113601.1455@ox.ac.uk> Date: Thu, 28 Jul 1994 11:36:01 GMT Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: Netscape 1.1N 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. -- Takeshi Hernández Zyxel U-1496E @ 14,400 bps "They will send a copy in my place." From jjohansson@mindspring.com Fri Jul 29 02:26:01 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!mindspring!jjohansson From: jjohansson@mindspring.com (Jen Johansson) Newsgroups: comp.dsp Subject: Re: [FLAME] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Jul29.022601.2439@mindspring.com> Date: Fri, 29 Jul 1994 02:26:01 GMT References: <1994Jul28.113601.1455@ox.ac.uk> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: Netscape 1.1N Lines: 11 In article <1994Jul28.113601.1455@ox.ac.uk>, thernandez@ox.ac.uk (Takeshi Hernández) 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. Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Jen Johansson Zyxel U-1496E @ 33,600 bps "We don't sign stars. We build them." From hvasiliev@mindspring.com Fri Jul 29 19:31:01 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!mindspring!hvasiliev From: hvasiliev@mindspring.com (Heather Vasiliev) Newsgroups: comp.dsp Subject: Re: [FLAME] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Jul29.193101.8603@mindspring.com> Date: Fri, 29 Jul 1994 19:31:01 GMT References: <1994Jul28.113601.1455@ox.ac.uk> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Jul28.113601.1455@ox.ac.uk>, thernandez@ox.ac.uk (Takeshi Hernández) 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'. On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. -- Heather Vasiliev Tape trading list upon request. SASE required for international mail. From fmoreau@earthlink.net Sat Jul 30 15:54:01 1994 Path: ashpoly!cascade!transat!ukc!fennimore!earthlink!fmoreau From: fmoreau@earthlink.net (Fiona Moreau) Newsgroups: comp.dsp Subject: Re: [FLAME] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Jul30.155401.3637@earthlink.net> Date: Sat, 30 Jul 1994 15:54:01 GMT References: <1994Jul28.113601.1455@ox.ac.uk> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: Netscape 1.1N Lines: 12 In article <1994Jul28.113601.1455@ox.ac.uk>, thernandez@ox.ac.uk (Takeshi Hernández) 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'. Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. PGP Public key available via finger or upon request. -- === Fiona Moreau === Dept of Electrical Engineering, EarthLink Network "Measuring a record you own is listening, not piracy." From bnakamura@cern.ch Sun Jul 31 21:33:01 1994 Path: ashpoly!cascade!transat!ukc!fennimore!cern!bnakamura From: bnakamura@cern.ch (Bill Nakamura) Newsgroups: comp.dsp Subject: Re: [FLAME] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Jul31.213301.2320@cern.ch> Date: Sun, 31 Jul 1994 21:33:01 GMT References: <1994Jul28.113601.1455@ox.ac.uk> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Jul28.113601.1455@ox.ac.uk>, thernandez@ox.ac.uk (Takeshi Hernández) 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. -- Bill Nakamura | bnakamura@cern.ch PGP Key fingerprint: 4461 57BA 3079 6E5B "Keep the channels open."