From mwatanabe@rwth-aachen.de Fri Sep 09 01:43:51 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!rwth-aachen!mwatanabe From: mwatanabe@rwth-aachen.de (Marta Watanabe) Newsgroups: comp.dsp Subject: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Sep09.014351.6554@rwth-aachen.de> Date: Fri, 09 Sep 1994 01:43:51 GMT Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: NewsWatcher 2.0b24 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). The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code. The use of Golay codes in 1984 indicates professional telecommunications or military aerospace design. -- === Marta Watanabe === Dept of Electrical Engineering, RWTH Aachen Informatik "We don't sign stars. We build them." From kmacdonald@cern.ch Fri Sep 09 20:41:51 1994 Path: ashpoly!cascade!bigsur!cern!kmacdonald From: kmacdonald@cern.ch (Katrin MacDonald) Newsgroups: comp.dsp Subject: Re: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Sep09.204151.8852@cern.ch> Date: Fri, 09 Sep 1994 20:41:51 GMT References: <1994Sep09.014351.6554@rwth-aachen.de> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Sep09.014351.6554@rwth-aachen.de>, mwatanabe@rwth-aachen.de (Marta Watanabe) writes: > Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. -- Katrin MacDonald "Extraordinary claims require extraordinary spectra." Amiga 3000T / SunOS 4.1.4 From mgonzalez@hanse.de Sat Sep 10 00:29:51 1994 Path: ashpoly!cascade!brgate!saturno!hanse!mgonzalez From: mgonzalez@hanse.de (Mateo González) Newsgroups: comp.dsp Subject: Re: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Sep10.002951.1090@hanse.de> Date: Sat, 10 Sep 1994 00:29:51 GMT References: <1994Sep09.014351.6554@rwth-aachen.de> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Sep09.014351.6554@rwth-aachen.de>, mwatanabe@rwth-aachen.de (Marta Watanabe) 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. -- Mateo González -- Hanse-Netzwerk Hamburg "5 sigma is a discovery. 7 is a question." From dbrennan@u-tokyo.ac.jp Sat Sep 10 21:00:51 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!u-tokyo!dbrennan From: dbrennan@u-tokyo.ac.jp (Dave Brennan) Newsgroups: comp.dsp Subject: Re: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Sep10.210051.6576@u-tokyo.ac.jp> Date: Sat, 10 Sep 1994 21:00:51 GMT References: <1994Sep09.014351.6554@rwth-aachen.de> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Sep09.014351.6554@rwth-aachen.de>, mwatanabe@rwth-aachen.de (Marta Watanabe) writes: > Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- Dave Brennan "Tape doesn't lie at 02:14. Ears do." PC-9821Ap2 (NEC) / TOS 4.04