From mkarlsson@pipeline.com Wed Oct 12 10:36:48 1994 Path: ashpoly!cascade!bigsur!pipeline!mkarlsson From: mkarlsson@pipeline.com (Marta Karlsson) Newsgroups: comp.dsp Subject: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Oct12.103648.3564@pipeline.com> Date: Wed, 12 Oct 1994 10:36:48 GMT Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com 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 symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20). 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. -- Marta Karlsson *PLONK* filter active for trolls. Macintosh IIfx - NetBSD 1.0 From soliveira@cern.ch Fri Oct 14 07:36:48 1994 Path: ashpoly!cascade!transat!ukc!fennimore!cern!soliveira From: soliveira@cern.ch (Sun-mi Oliveira) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Oct14.073648.7015@cern.ch> Date: Fri, 14 Oct 1994 07:36:48 GMT References: <1994Oct12.103648.3564@pipeline.com> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Oct12.103648.3564@pipeline.com>, mkarlsson@pipeline.com (Marta Karlsson) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! -- === Sun-mi Oliveira === Dept of Electrical Engineering, European Laboratory for Particle Physics, Geneva "Row 14. No joke." From hkim@u-tokyo.ac.jp Sat Oct 15 18:28:48 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!u-tokyo!hkim From: hkim@u-tokyo.ac.jp (Hana Kim) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Oct15.182848.4334@u-tokyo.ac.jp> Date: Sat, 15 Oct 1994 18:28:48 GMT References: <1994Oct12.103648.3564@pipeline.com> <1994Oct14.073648.7015@cern.ch> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Oct14.073648.7015@cern.ch>, soliveira@cern.ch (Sun-mi Oliveira) 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! -- === Hana Kim === Dept of Electrical Engineering, University of Tokyo Department of Information Science "There are 14 nodes and only 10 countries. Count again."