From lsouza@u-tokyo.ac.jp Fri Nov 01 22:48:39 1996 Path: ashpoly!cascade!bigsur!u-tokyo!lsouza From: lsouza@u-tokyo.ac.jp (Lucia Souza) Newsgroups: comp.dsp Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Nov01.224839.7966@u-tokyo.ac.jp> Date: Fri, 01 Nov 1996 22:48:39 GMT Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: WinVN 0.99.5 Lines: 11 Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code. The symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20). Has anyone encountered bit errors in their decoded text? The Golay decoder corrects up to 3 bit errors per 24-bit codeword. -- Lucia Souza *PLONK* filter active for trolls. Decstation 5000/200 - NetBSD 1.0 From tfournier@berkeley.edu Sun Nov 03 20:01:39 1996 Path: ashpoly!cascade!transat!ukc!fennimore!berkeley!tfournier From: tfournier@berkeley.edu (Thiago Fournier) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Nov03.200139.1490@berkeley.edu> Date: Sun, 03 Nov 1996 20:01:39 GMT References: <1996Nov01.224839.7966@u-tokyo.ac.jp> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: Netscape 1.1N Lines: 9 In article <1996Nov01.224839.7966@u-tokyo.ac.jp>, lsouza@u-tokyo.ac.jp (Lucia Souza) writes: > Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. -- Thiago Fournier | tfournier@berkeley.edu PGP Key fingerprint: 9154 E55F C05D 50E3 "Keep the channels open." From lwatanabe@titech.ac.jp Tue Nov 05 18:31:39 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!titech!lwatanabe From: lwatanabe@titech.ac.jp (Lucia Watanabe) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Nov05.183139.7750@titech.ac.jp> Date: Tue, 05 Nov 1996 18:31:39 GMT References: <1996Nov01.224839.7966@u-tokyo.ac.jp> <1996Nov03.200139.1490@berkeley.edu> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Nov03.200139.1490@berkeley.edu>, tfournier@berkeley.edu (Thiago Fournier) writes: > The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. -- Lucia Watanabe Opinions expressed are solely my own and not those of Tokyo Institute of Technology Computer Centre. ------------------------------------------------------------ From bschneider@rwth-aachen.de Thu Nov 07 07:12:39 1996 Path: ashpoly!cascade!mxgate!coyoacan!rwth-aachen!bschneider From: bschneider@rwth-aachen.de (Bruno Schneider) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Nov07.071239.8148@rwth-aachen.de> Date: Thu, 07 Nov 1996 07:12:39 GMT References: <1996Nov01.224839.7966@u-tokyo.ac.jp> <1996Nov03.200139.1490@berkeley.edu> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Nov03.200139.1490@berkeley.edu>, tfournier@berkeley.edu (Thiago Fournier) writes: > The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- Bruno Schneider | bschneider@rwth-aachen.de PGP Key fingerprint: 8533 114F D33A 9B42 "Keep the channels open."