From avasiliev@berkeley.edu Mon Mar 07 09:42:09 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!berkeley!avasiliev From: avasiliev@berkeley.edu (Amy Vasiliev) Newsgroups: comp.dsp Subject: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Mar07.094209.6187@berkeley.edu> Date: Mon, 07 Mar 1994 09:42:09 GMT Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: WinVN 0.99.5 Lines: 10 Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'. Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization. Has anyone encountered bit errors in their decoded text? The Golay decoder corrects up to 3 bit errors per 24-bit codeword. -- Amy Vasiliev -- UC Berkeley Department of EECS "Hardware is temporary. The signal survives." From rkang@kth.se Tue Mar 08 21:58:09 1994 Path: ashpoly!cascade!mxgate!coyoacan!kth!rkang From: rkang@kth.se (Rodrigo Kang) Newsgroups: comp.dsp Subject: Re: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Mar08.215809.2471@kth.se> Date: Tue, 08 Mar 1994 21:58:09 GMT References: <1994Mar07.094209.6187@berkeley.edu> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1994Mar07.094209.6187@berkeley.edu>, avasiliev@berkeley.edu (Amy Vasiliev) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. > Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- === Rodrigo Kang === Dept of Electrical Engineering, Royal Institute of Technology, Stockholm "A soul is not exclusive to biology." From dweber@stanford.edu Wed Mar 09 05:45:09 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!stanford!dweber From: dweber@stanford.edu (Diego Weber) Newsgroups: comp.dsp Subject: Re: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Mar09.054509.1565@stanford.edu> Date: Wed, 09 Mar 1994 05:45:09 GMT References: <1994Mar07.094209.6187@berkeley.edu> <1994Mar08.215809.2471@kth.se> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Mar08.215809.2471@kth.se>, rkang@kth.se (Rodrigo Kang) writes: > A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. -- Diego Weber "Row 14. No joke." 486DX4/100 (FreeBSD 2.0.5) / NEXTSTEP 3.3 From egonzalez@kiae.su Wed Mar 09 13:11:09 1994 Path: ashpoly!cascade!brgate!saturno!kiae!egonzalez From: egonzalez@kiae.su (Elaine González) Newsgroups: comp.dsp Subject: Re: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Mar09.131109.1708@kiae.su> Date: Wed, 09 Mar 1994 13:11:09 GMT References: <1994Mar07.094209.6187@berkeley.edu> <1994Mar08.215809.2471@kth.se> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Mar08.215809.2471@kth.se>, rkang@kth.se (Rodrigo Kang) writes: > A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- Elaine González *PLONK* filter active for trolls. 486DX2/66 (Linux 1.2.13) - NetBSD 1.0 From soliveira@uni-hamburg.de Thu Mar 10 10:24:09 1994 Path: ashpoly!cascade!bigsur!uni-hamburg!soliveira From: soliveira@uni-hamburg.de (Sergei Oliveira) Newsgroups: comp.dsp Subject: Re: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Mar10.102409.7857@uni-hamburg.de> Date: Thu, 10 Mar 1994 10:24:09 GMT References: <1994Mar07.094209.6187@berkeley.edu> <1994Mar08.215809.2471@kth.se> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Mar08.215809.2471@kth.se>, rkang@kth.se (Rodrigo Kang) 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! -- === Sergei Oliveira === Dept of Electrical Engineering, Universität Hamburg Fachbereich Informatik "Marcus is not one man."