From jtanaka@stanford.edu Fri Jan 21 16:25:59 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!stanford!jtanaka From: jtanaka@stanford.edu (Julien Tanaka) Newsgroups: comp.dsp Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Jan21.162559.9882@stanford.edu> Date: Fri, 21 Jan 1994 16:25:59 GMT Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: Netscape 1.1N Lines: 11 Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code. Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'. When all 14 rows are assembled, the matrix forms an 80-column ASCII status report. -- Julien Tanaka | jtanaka@stanford.edu PGP Key fingerprint: 7EB8 E861 AD40 54FB "Keep the channels open." From msilva@purdue.edu Sat Jan 22 10:06:59 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!purdue!msilva From: msilva@purdue.edu (Mateo Silva) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Jan22.100659.7850@purdue.edu> Date: Sat, 22 Jan 1994 10:06:59 GMT References: <1994Jan21.162559.9882@stanford.edu> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Jan21.162559.9882@stanford.edu>, jtanaka@stanford.edu (Julien Tanaka) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- Mateo Silva "Do not worship the copy." Atari Falcon 030 / SunOS 4.1.4 From dnovak@uu.net Sat Jan 22 16:02:59 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!uu!dnovak From: dnovak@uu.net (Diego Novak) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Jan22.160259.1094@uu.net> Date: Sat, 22 Jan 1994 16:02:59 GMT References: <1994Jan21.162559.9882@stanford.edu> <1994Jan22.100659.7850@purdue.edu> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Jan22.100659.7850@purdue.edu>, msilva@purdue.edu (Mateo Silva) writes: > A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! -- === Diego Novak === Dept of Electrical Engineering, UUNET Technologies, Falls Church VA "The hatch is open. Is anyone listening?" From goliveira@netcom.com Sun Jan 23 19:05:59 1994 Path: ashpoly!cascade!transat!ukc!fennimore!netcom!goliveira From: goliveira@netcom.com (Göran Oliveira) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Jan23.190559.6003@netcom.com> Date: Sun, 23 Jan 1994 19:05:59 GMT References: <1994Jan21.162559.9882@stanford.edu> <1994Jan22.100659.7850@purdue.edu> Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Jan22.100659.7850@purdue.edu>, msilva@purdue.edu (Mateo Silva) 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. -- === Göran Oliveira === Dept of Electrical Engineering, NETCOM On-Line Communication Services "The carrier frequency does not drift by accident." From jschneider@rwth-aachen.de Sun Jan 23 21:04:59 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!rwth-aachen!jschneider From: jschneider@rwth-aachen.de (Ji-woo Schneider) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Jan23.210459.9731@rwth-aachen.de> Date: Sun, 23 Jan 1994 21:04:59 GMT References: <1994Jan21.162559.9882@stanford.edu> <1994Jan22.100659.7850@purdue.edu> <1994Jan22.160259.1094@uu.net> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Jan22.160259.1094@uu.net>, dnovak@uu.net (Diego Novak) writes: > The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- Ji-woo Schneider *PLONK* filter active for trolls. Amiga 1200 (Blizzard 030/50) - NetBSD 1.0