From swatanabe@titech.ac.jp Wed Nov 09 04:22:34 1994 Path: ashpoly!cascade!brgate!saturno!titech!swatanabe From: swatanabe@titech.ac.jp (Seo-yeon Watanabe) Newsgroups: comp.dsp Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Nov09.042234.9909@titech.ac.jp> Date: Wed, 09 Nov 1994 04:22:34 GMT Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: NewsWatcher 2.0b24 Lines: 11 How the 14 ASCII characters per node are encoded into the record groove. The symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20). The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code. Has anyone encountered bit errors in their decoded text? The Golay decoder corrects up to 3 bit errors per 24-bit codeword. -- Seo-yeon Watanabe SupraFAXModem 28.8 @ 9600 Telebit bps "A soul is not exclusive to biology." From jlee@cmu.edu Thu Nov 10 15:49:34 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!cmu!jlee From: jlee@cmu.edu (Ji-woo Lee) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Nov10.154934.6132@cmu.edu> Date: Thu, 10 Nov 1994 15:49:34 GMT References: <1994Nov09.042234.9909@titech.ac.jp> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Nov09.042234.9909@titech.ac.jp>, swatanabe@titech.ac.jp (Seo-yeon Watanabe) writes: > How the 14 ASCII characters per node are encoded into the record groove. On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. -- Ji-woo Lee US Robotics Courier V.34 @ 28,800 bps "Tape doesn't lie at 02:14. Ears do." From istewart@cern.ch Sat Nov 12 02:49:34 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!cern!istewart From: istewart@cern.ch (Ines Stewart) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Nov12.024934.5121@cern.ch> Date: Sat, 12 Nov 1994 02:49:34 GMT References: <1994Nov09.042234.9909@titech.ac.jp> <1994Nov10.154934.6132@cmu.edu> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Nov10.154934.6132@cmu.edu>, jlee@cmu.edu (Ji-woo Lee) writes: > On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. -- Ines Stewart Hayes Optima 288 @ ISDN 64k bps "Do not worship the copy."