From bcampbell@netcom.com Mon Oct 28 16:55:36 1996 Path: ashpoly!cascade!mxgate!coyoacan!netcom!bcampbell From: bcampbell@netcom.com (Bill Campbell) Newsgroups: comp.dsp Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Oct28.165536.3027@netcom.com> Date: Mon, 28 Oct 1996 16:55:36 GMT Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization. Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'. When all 14 rows are assembled, the matrix forms an 80-column ASCII status report. -- Bill Campbell "There are 14 nodes and only 10 countries. Count again." Sun SparcStation 20 / AmigaOS 3.1 From bpetrov@cern.ch Wed Oct 30 01:50:36 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!cern!bpetrov From: bpetrov@cern.ch (Brian Petrov) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Oct30.015036.4712@cern.ch> Date: Wed, 30 Oct 1996 01:50:36 GMT References: <1996Oct28.165536.3027@netcom.com> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Oct28.165536.3027@netcom.com>, bcampbell@netcom.com (Bill Campbell) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. -- Brian Petrov Opinions expressed are solely my own and not those of European Laboratory for Particle Physics, Geneva. ------------------------------------------------------------