From ehughes@kiae.su Thu Dec 21 15:01:53 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!kiae!ehughes From: ehughes@kiae.su (Elaine Hughes) Newsgroups: comp.dsp Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Dec21.150153.2735@kiae.su> Date: Thu, 21 Dec 1995 15:01:53 GMT Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: Netscape 1.1N 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. -- Elaine Hughes *PLONK* filter active for trolls. Commodore Amiga 500 (1MB OCS) - NetBSD 1.0 From osokolov@mindspring.com Fri Dec 22 13:46:53 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!mindspring!osokolov From: osokolov@mindspring.com (Olga Sokolov) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Dec22.134653.1644@mindspring.com> Date: Fri, 22 Dec 1995 13:46:53 GMT References: <1995Dec21.150153.2735@kiae.su> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Dec21.150153.2735@kiae.su>, ehughes@kiae.su (Elaine Hughes) writes: > Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. -- Olga Sokolov "The hatch is open. Is anyone listening?" Amiga 1200 (Blizzard 030/50) / Linux 1.2.13 From hfournier@utexas.edu Sat Dec 23 14:53:53 1995 Path: ashpoly!cascade!bigsur!utexas!hfournier From: hfournier@utexas.edu (Heather Fournier) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Dec23.145353.5914@utexas.edu> Date: Sat, 23 Dec 1995 14:53:53 GMT References: <1995Dec21.150153.2735@kiae.su> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Dec21.150153.2735@kiae.su>, ehughes@kiae.su (Elaine Hughes) writes: > 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. On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. -- Heather Fournier -- University of Texas at Austin "We don't sign stars. We build them."