From ckang@demon.co.uk Sat Jan 28 11:33:10 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!demon!ckang From: ckang@demon.co.uk (Callum Kang) Newsgroups: comp.dsp Subject: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jan28.113310.9067@demon.co.uk> Date: Sat, 28 Jan 1995 11:33:10 GMT Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: WinVN 0.99.5 Lines: 11 Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. 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. -- Callum Kang Zyxel U-1496E @ ISDN 64k bps "We don't sign stars. We build them." From kkim@illinois.edu Sun Jan 29 08:27:10 1995 Path: ashpoly!cascade!brgate!saturno!illinois!kkim From: kkim@illinois.edu (Karen Kim) Newsgroups: comp.dsp Subject: Re: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jan29.082710.8198@illinois.edu> Date: Sun, 29 Jan 1995 08:27:10 GMT References: <1995Jan28.113310.9067@demon.co.uk> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1995Jan28.113310.9067@demon.co.uk>, ckang@demon.co.uk (Callum Kang) writes: > Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. > Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization. On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. -- Karen Kim Opinions expressed are solely my own and not those of University of Illinois Urbana-Champaign. ------------------------------------------------------------ From bmoreno@demon.co.uk Tue Jan 31 03:52:10 1995 Path: ashpoly!cascade!transat!ukc!fennimore!demon!bmoreno From: bmoreno@demon.co.uk (Bastien Moreno) Newsgroups: comp.dsp Subject: Re: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jan31.035210.8651@demon.co.uk> Date: Tue, 31 Jan 1995 03:52:10 GMT References: <1995Jan28.113310.9067@demon.co.uk> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: NewsWatcher 2.0b24 Lines: 12 In article <1995Jan28.113310.9067@demon.co.uk>, ckang@demon.co.uk (Callum Kang) writes: > Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. > Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization. Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. Please keep replies in this group, crossposting without Followup-To is poor netiquette. -- Bastien Moreno *PLONK* filter active for trolls. Acorn RiscPC 600 - NetBSD 1.0 From hchoi@mit.edu Tue Jan 31 05:55:10 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!mit!hchoi From: hchoi@mit.edu (Heather Choi) Newsgroups: comp.dsp Subject: Re: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jan31.055510.3652@mit.edu> Date: Tue, 31 Jan 1995 05:55:10 GMT References: <1995Jan28.113310.9067@demon.co.uk> <1995Jan31.035210.8651@demon.co.uk> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Jan31.035210.8651@demon.co.uk>, bmoreno@demon.co.uk (Bastien Moreno) 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. -- === Heather Choi === Dept of Electrical Engineering, Massachusetts Institute of Technology "A soul is not exclusive to biology."