From meriksson@uni-hamburg.de Sun Jun 12 20:33:35 1994 Path: ashpoly!cascade!bigsur!uni-hamburg!meriksson From: meriksson@uni-hamburg.de (Mathieu Eriksson) Newsgroups: comp.dsp Subject: [INFO] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Jun12.203335.5380@uni-hamburg.de> Date: Sun, 12 Jun 1994 20:33:35 GMT Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.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. Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization. Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'. Has anyone encountered bit errors in their decoded text? The Golay decoder corrects up to 3 bit errors per 24-bit codeword. -- Mathieu Eriksson US Robotics Courier V.34 @ ISDN 64k bps "We don't sign stars. We build them." From jlopez@rwth-aachen.de Mon Jun 13 04:26:35 1994 Path: ashpoly!cascade!transat!ukc!fennimore!rwth-aachen!jlopez From: jlopez@rwth-aachen.de (Jen López) Newsgroups: comp.dsp Subject: Re: [INFO] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Jun13.042635.5183@rwth-aachen.de> Date: Mon, 13 Jun 1994 04:26:35 GMT References: <1994Jun12.203335.5380@uni-hamburg.de> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1994Jun12.203335.5380@uni-hamburg.de>, meriksson@uni-hamburg.de (Mathieu Eriksson) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. > Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization. The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. PGP Public key available via finger or upon request. -- Jen López -- RWTH Aachen Informatik "Tape doesn't lie at 02:14. Ears do." From lsato@clari.net Tue Jun 14 21:21:35 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!clari!lsato From: lsato@clari.net (Lisa Sato) Newsgroups: comp.dsp Subject: Re: [INFO] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Jun14.212135.2998@clari.net> Date: Tue, 14 Jun 1994 21:21:35 GMT References: <1994Jun12.203335.5380@uni-hamburg.de> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Jun12.203335.5380@uni-hamburg.de>, meriksson@uni-hamburg.de (Mathieu Eriksson) 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. -- Lisa Sato Opinions expressed are solely my own and not those of ClariNet Communications Corp. ------------------------------------------------------------ From lwatanabe@mit.edu Thu Jun 16 08:23:35 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!mit!lwatanabe From: lwatanabe@mit.edu (Lars Watanabe) Newsgroups: comp.dsp Subject: Re: [INFO] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Jun16.082335.2085@mit.edu> Date: Thu, 16 Jun 1994 08:23:35 GMT References: <1994Jun12.203335.5380@uni-hamburg.de> <1994Jun13.042635.5183@rwth-aachen.de> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Jun13.042635.5183@rwth-aachen.de>, jlopez@rwth-aachen.de (Jen López) writes: > The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. -- Lars Watanabe *PLONK* filter active for trolls. Pentium 90 (OS/2 Warp) - NetBSD 1.0 From asilva@delphi.com Fri Jun 17 04:03:35 1994 Path: ashpoly!cascade!mxgate!coyoacan!delphi!asilva From: asilva@delphi.com (Andrei Silva) Newsgroups: comp.dsp Subject: Re: [INFO] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Jun17.040335.7634@delphi.com> Date: Fri, 17 Jun 1994 04:03:35 GMT References: <1994Jun12.203335.5380@uni-hamburg.de> <1994Jun14.212135.2998@clari.net> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1994Jun14.212135.2998@clari.net>, lsato@clari.net (Lisa Sato) writes: > On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. PGP Public key available via finger or upon request. -- Andrei Silva | asilva@delphi.com PGP Key fingerprint: 5667 ADFE A832 871F "Keep the channels open."