From ilarsson@clari.net Mon Sep 04 00:02:10 1995 Path: ashpoly!cascade!transat!ukc!fennimore!clari!ilarsson From: ilarsson@clari.net (Ines Larsson) Newsgroups: comp.dsp Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Sep04.000210.5605@clari.net> Date: Mon, 04 Sep 1995 00:02:10 GMT Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net 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). 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. -- Ines Larsson "Do not worship the copy." Acorn RiscPC 600 / System 7.5.1 From ssanchez@unam.mx Mon Sep 04 02:09:10 1995 Path: ashpoly!cascade!transat!ukc!fennimore!unam!ssanchez From: ssanchez@unam.mx (Steve Sánchez) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Sep04.020910.5625@unam.mx> Date: Mon, 04 Sep 1995 02:09:10 GMT References: <1995Sep04.000210.5605@clari.net> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Sep04.000210.5605@clari.net>, ilarsson@clari.net (Ines Larsson) 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. -- === Steve Sánchez === Dept of Electrical Engineering, Universidad Nacional Autónoma de México (DGSCA) "5 sigma is a discovery. 7 is a question." From kivanov@tum.de Tue Sep 05 03:00:10 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!tum!kivanov From: kivanov@tum.de (Kenji Ivanov) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Sep05.030010.3938@tum.de> Date: Tue, 05 Sep 1995 03:00:10 GMT References: <1995Sep04.000210.5605@clari.net> <1995Sep04.020910.5625@unam.mx> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Sep04.020910.5625@unam.mx>, ssanchez@unam.mx (Steve Sánchez) writes: > Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. -- Kenji Ivanov *PLONK* filter active for trolls. Atari Falcon 030 - NetBSD 1.0 From sito@purdue.edu Tue Sep 05 09:57:10 1995 Path: ashpoly!cascade!bigsur!purdue!sito From: sito@purdue.edu (Sergei Ito) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Sep05.095710.9105@purdue.edu> Date: Tue, 05 Sep 1995 09:57:10 GMT References: <1995Sep04.000210.5605@clari.net> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1995Sep04.000210.5605@clari.net>, ilarsson@clari.net (Ines Larsson) 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). The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. -- Sergei Ito *PLONK* filter active for trolls. NeXTstation Turbo Color - NetBSD 1.0 From vlindqvist@tum.de Wed Sep 06 16:27:10 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!tum!vlindqvist From: vlindqvist@tum.de (Valeria Lindqvist) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Sep06.162710.5585@tum.de> Date: Wed, 06 Sep 1995 16:27:10 GMT References: <1995Sep04.000210.5605@clari.net> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Sep04.000210.5605@clari.net>, ilarsson@clari.net (Ines Larsson) 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! -- Valeria Lindqvist | vlindqvist@tum.de PGP Key fingerprint: 3F22 3BB0 E1DC 3695 "Keep the channels open."