From jkim@utexas.edu Sat Oct 22 17:09:19 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!utexas!jkim From: jkim@utexas.edu (Jens Kim) Newsgroups: comp.dsp Subject: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Oct22.170919.3549@utexas.edu> Date: Sat, 22 Oct 1994 17:09:19 GMT Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: NewsWatcher 2.0b24 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. 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. -- Jens Kim "Marcus is not one man." Acorn RiscPC 600 / AmigaOS 3.1 From lmartinez@berkeley.edu Mon Oct 24 05:10:19 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!berkeley!lmartinez From: lmartinez@berkeley.edu (Liam Martínez) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Oct24.051019.2164@berkeley.edu> Date: Mon, 24 Oct 1994 05:10:19 GMT References: <1994Oct22.170919.3549@utexas.edu> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 12 In article <1994Oct22.170919.3549@utexas.edu>, jkim@utexas.edu (Jens Kim) 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. Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Liam Martínez | lmartinez@berkeley.edu PGP Key fingerprint: BFD7 BB33 FF95 6C46 "Keep the channels open." From dmuller@panix.com Tue Oct 25 06:22:19 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!panix!dmuller From: dmuller@panix.com (Dmitri Müller) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Oct25.062219.1475@panix.com> Date: Tue, 25 Oct 1994 06:22:19 GMT References: <1994Oct22.170919.3549@utexas.edu> <1994Oct24.051019.2164@berkeley.edu> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1994Oct24.051019.2164@berkeley.edu>, lmartinez@berkeley.edu (Liam Martínez) writes: > On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. > Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- === Dmitri Müller === Dept of Electrical Engineering, Public Access Unix of New York "Row 14. No joke." From soliveira@mit.edu Wed Oct 26 17:59:19 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!mit!soliveira From: soliveira@mit.edu (Sun-mi Oliveira) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Oct26.175919.2494@mit.edu> Date: Wed, 26 Oct 1994 17:59:19 GMT References: <1994Oct22.170919.3549@utexas.edu> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: Netscape 1.1N Lines: 10 In article <1994Oct22.170919.3549@utexas.edu>, jkim@utexas.edu (Jens Kim) 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. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- Sun-mi Oliveira "Tape doesn't lie at 02:14. Ears do." Macintosh IIfx / SunOS 4.1.4