From dvasiliev@kth.se Sat Mar 18 01:48:58 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!kth!dvasiliev From: dvasiliev@kth.se (Dong-hyun Vasiliev) Newsgroups: comp.dsp Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Mar18.014858.9122@kth.se> Date: Sat, 18 Mar 1995 01:48:58 GMT Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se 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. 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. -- Dong-hyun Vasiliev Opinions expressed are solely my own and not those of Royal Institute of Technology, Stockholm. ------------------------------------------------------------ From avasiliev@inria.fr Mon Mar 20 03:17:58 1995 Path: ashpoly!cascade!mxgate!coyoacan!inria!avasiliev From: avasiliev@inria.fr (Andrei Vasiliev) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Mar20.031758.3063@inria.fr> Date: Mon, 20 Mar 1995 03:17:58 GMT References: <1995Mar18.014858.9122@kth.se> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Mar18.014858.9122@kth.se>, dvasiliev@kth.se (Dong-hyun Vasiliev) 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'. The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! -- Andrei Vasiliev *PLONK* filter active for trolls. 486DX4/100 (FreeBSD 2.0.5) - NetBSD 1.0 From lnilsson@mindspring.com Tue Mar 21 20:36:58 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!mindspring!lnilsson From: lnilsson@mindspring.com (Lars Nilsson) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Mar21.203658.3776@mindspring.com> Date: Tue, 21 Mar 1995 20:36:58 GMT References: <1995Mar18.014858.9122@kth.se> <1995Mar20.031758.3063@inria.fr> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: NewsWatcher 2.0b24 Lines: 8 In article <1995Mar20.031758.3063@inria.fr>, avasiliev@inria.fr (Andrei Vasiliev) writes: > The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. -- Lars Nilsson -- MindSpring Enterprises "Do not worship the copy." From bfischer@netcom.com Wed Mar 22 09:27:58 1995 Path: ashpoly!cascade!mxgate!coyoacan!netcom!bfischer From: bfischer@netcom.com (Bastien Fischer) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Mar22.092758.5088@netcom.com> Date: Wed, 22 Mar 1995 09:27:58 GMT References: <1995Mar18.014858.9122@kth.se> <1995Mar20.031758.3063@inria.fr> Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1995Mar20.031758.3063@inria.fr>, avasiliev@inria.fr (Andrei Vasiliev) writes: > The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. -- === Bastien Fischer === Dept of Electrical Engineering, NETCOM On-Line Communication Services "Hardware is temporary. The signal survives." From clee@panix.com Fri Mar 24 00:54:58 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!panix!clee From: clee@panix.com (Camila Lee) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Mar24.005458.2657@panix.com> Date: Fri, 24 Mar 1995 00:54:58 GMT References: <1995Mar18.014858.9122@kth.se> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1995Mar18.014858.9122@kth.se>, dvasiliev@kth.se (Dong-hyun Vasiliev) 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'. The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! -- Camila Lee | clee@panix.com PGP Key fingerprint: 8F21 D82E C33F 80D0 "Keep the channels open."