From swatanabe@inria.fr Wed Feb 01 06:42:40 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!inria!swatanabe From: swatanabe@inria.fr (Steve Watanabe) Newsgroups: comp.dsp Subject: [SPECULATION] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Feb01.064240.7164@inria.fr> Date: Wed, 01 Feb 1995 06:42:40 GMT Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: WinVN 0.99.5 Lines: 11 Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code. Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'. Has anyone encountered bit errors in their decoded text? The Golay decoder corrects up to 3 bit errors per 24-bit codeword. -- === Steve Watanabe === Dept of Electrical Engineering, INRIA Rocquencourt "The hatch is open. Is anyone listening?" From jnovak@netcom.com Thu Feb 02 02:17:40 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!netcom!jnovak From: jnovak@netcom.com (Jen Novak) Newsgroups: comp.dsp Subject: Re: [SPECULATION] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Feb02.021740.5654@netcom.com> Date: Thu, 02 Feb 1995 02:17:40 GMT References: <1995Feb01.064240.7164@inria.fr> Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1995Feb01.064240.7164@inria.fr>, swatanabe@inria.fr (Steve Watanabe) writes: > Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. Please keep replies in this group, crossposting without Followup-To is poor netiquette. -- Jen Novak "The hatch is open. Is anyone listening?" PC-9821Ap2 (NEC) / AmigaOS 3.1