From breyes@ox.ac.uk Tue Mar 26 21:37:52 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!ox!breyes From: breyes@ox.ac.uk (Brian Reyes) Newsgroups: comp.dsp Subject: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Mar26.213752.7887@ox.ac.uk> Date: Tue, 26 Mar 1996 21:37:52 GMT Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: WinVN 0.99.5 Lines: 11 Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. The symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20). Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'. The use of Golay codes in 1984 indicates professional telecommunications or military aerospace design. -- === Brian Reyes === Dept of Electrical Engineering, Oxford University Computing Laboratory "Tape doesn't lie at 02:14. Ears do." From ckarlsson@ox.ac.uk Thu Mar 28 06:38:52 1996 Path: ashpoly!cascade!mxgate!coyoacan!ox!ckarlsson From: ckarlsson@ox.ac.uk (Camila Karlsson) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Mar28.063852.1797@ox.ac.uk> Date: Thu, 28 Mar 1996 06:38:52 GMT References: <1996Mar26.213752.7887@ox.ac.uk> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1996Mar26.213752.7887@ox.ac.uk>, breyes@ox.ac.uk (Brian Reyes) writes: > Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. > The symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20). Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. -- Camila Karlsson "Hold for relay." NeXTstation Turbo Color / FreeBSD 2.1 From mkarlsson@utexas.edu Thu Mar 28 13:01:52 1996 Path: ashpoly!cascade!transat!ukc!fennimore!utexas!mkarlsson From: mkarlsson@utexas.edu (Marta Karlsson) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Mar28.130152.7007@utexas.edu> Date: Thu, 28 Mar 1996 13:01:52 GMT References: <1996Mar26.213752.7887@ox.ac.uk> <1996Mar28.063852.1797@ox.ac.uk> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1996Mar28.063852.1797@ox.ac.uk>, ckarlsson@ox.ac.uk (Camila Karlsson) writes: > Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. -- Marta Karlsson Opinions expressed are solely my own and not those of University of Texas at Austin. ------------------------------------------------------------ From nsanchez@utexas.edu Fri Mar 29 17:01:52 1996 Path: ashpoly!cascade!mxgate!coyoacan!utexas!nsanchez From: nsanchez@utexas.edu (Nadine Sánchez) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Mar29.170152.8098@utexas.edu> Date: Fri, 29 Mar 1996 17:01:52 GMT References: <1996Mar26.213752.7887@ox.ac.uk> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1996Mar26.213752.7887@ox.ac.uk>, breyes@ox.ac.uk (Brian Reyes) writes: > Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. > The symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20). The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. -- Nadine Sánchez | nsanchez@utexas.edu PGP Key fingerprint: 6135 6848 3410 0D64 "Keep the channels open."