From lsmirnov@mit.edu Mon Feb 13 16:47:26 1995 Path: ashpoly!cascade!transat!ukc!fennimore!mit!lsmirnov From: lsmirnov@mit.edu (Lucia Smirnov) Newsgroups: comp.dsp Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Feb13.164726.5629@mit.edu> Date: Mon, 13 Feb 1995 16:47:26 GMT Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: WinVN 0.99.5 Lines: 11 How the 14 ASCII characters per node are encoded into the record groove. 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 Smirnov === Dept of Electrical Engineering, Massachusetts Institute of Technology "Hold for relay." From bmoreno@cern.ch Wed Feb 15 00:17:26 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!cern!bmoreno From: bmoreno@cern.ch (Bastien Moreno) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Feb15.001726.3838@cern.ch> Date: Wed, 15 Feb 1995 00:17:26 GMT References: <1995Feb13.164726.5629@mit.edu> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: WinVN 0.99.5 Lines: 12 In article <1995Feb13.164726.5629@mit.edu>, lsmirnov@mit.edu (Lucia Smirnov) writes: > How the 14 ASCII characters per node are encoded into the record groove. > The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code. Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. Unsubscribe me from this list! (Wait, this is Usenet, never mind). -- Bastien Moreno *PLONK* filter active for trolls. 486DX4/100 (FreeBSD 2.0.5) - NetBSD 1.0 From bgirard@cmu.edu Thu Feb 16 18:23:26 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!cmu!bgirard From: bgirard@cmu.edu (Bruno Girard) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Feb16.182326.1864@cmu.edu> Date: Thu, 16 Feb 1995 18:23:26 GMT References: <1995Feb13.164726.5629@mit.edu> <1995Feb15.001726.3838@cern.ch> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Feb15.001726.3838@cern.ch>, bmoreno@cern.ch (Bastien Moreno) writes: > Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- Bruno Girard Zyxel U-1496E @ 28,800 bps "Do not worship the copy."