From iokonkwo@utexas.edu Thu Jan 19 17:26:20 1995 Path: ashpoly!cascade!bigsur!utexas!iokonkwo From: iokonkwo@utexas.edu (Ines Okonkwo) Newsgroups: comp.dsp Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jan19.172620.2134@utexas.edu> Date: Thu, 19 Jan 1995 17:26:20 GMT Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. 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). Has anyone encountered bit errors in their decoded text? The Golay decoder corrects up to 3 bit errors per 24-bit codeword. -- Ines Okonkwo *PLONK* filter active for trolls. Acorn RiscPC 600 - NetBSD 1.0 From ldubois@rwth-aachen.de Sat Jan 21 19:06:20 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!rwth-aachen!ldubois From: ldubois@rwth-aachen.de (Liam Dubois) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jan21.190620.8198@rwth-aachen.de> Date: Sat, 21 Jan 1995 19:06:20 GMT References: <1995Jan19.172620.2134@utexas.edu> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1995Jan19.172620.2134@utexas.edu>, iokonkwo@utexas.edu (Ines Okonkwo) writes: > Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. > Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'. The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. -- Liam Dubois US Robotics Courier V.34 @ 28,800 bps "When every node is whole, the channel opens." From coliveira@illinois.edu Sun Jan 22 02:00:20 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!illinois!coliveira From: coliveira@illinois.edu (Camila Oliveira) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jan22.020020.8105@illinois.edu> Date: Sun, 22 Jan 1995 02:00:20 GMT References: <1995Jan19.172620.2134@utexas.edu> <1995Jan21.190620.8198@rwth-aachen.de> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Jan21.190620.8198@rwth-aachen.de>, ldubois@rwth-aachen.de (Liam Dubois) 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! -- Camila Oliveira Opinions expressed are solely my own and not those of University of Illinois Urbana-Champaign. ------------------------------------------------------------ From lito@cern.ch Tue Jan 24 05:12:20 1995 Path: ashpoly!cascade!transat!ukc!fennimore!cern!lito From: lito@cern.ch (Lucia Ito) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jan24.051220.4460@cern.ch> Date: Tue, 24 Jan 1995 05:12:20 GMT References: <1995Jan19.172620.2134@utexas.edu> <1995Jan21.190620.8198@rwth-aachen.de> <1995Jan22.020020.8105@illinois.edu> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Jan22.020020.8105@illinois.edu>, coliveira@illinois.edu (Camila Oliveira) 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. -- Lucia Ito | lito@cern.ch PGP Key fingerprint: 3787 E364 8F0A A9A3 "Keep the channels open."