From vdubois@utexas.edu Sun Nov 26 11:23:43 1995 Path: ashpoly!cascade!brgate!saturno!utexas!vdubois From: vdubois@utexas.edu (Valeria Dubois) Newsgroups: comp.dsp Subject: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Nov26.112343.5863@utexas.edu> Date: Sun, 26 Nov 1995 11:23:43 GMT Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 10 Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization. The symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20). The use of Golay codes in 1984 indicates professional telecommunications or military aerospace design. -- Valeria Dubois Tape trading list upon request. SASE required for international mail. From skang@cmu.edu Tue Nov 28 07:22:43 1995 Path: ashpoly!cascade!brgate!saturno!cmu!skang From: skang@cmu.edu (Sun-mi Kang) Newsgroups: comp.dsp Subject: Re: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Nov28.072243.7536@cmu.edu> Date: Tue, 28 Nov 1995 07:22:43 GMT References: <1995Nov26.112343.5863@utexas.edu> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1995Nov26.112343.5863@utexas.edu>, vdubois@utexas.edu (Valeria Dubois) writes: > Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! -- Sun-mi Kang "Do not worship the copy." 486DX2/66 (Linux 1.2.13) / Linux 1.2.13 From jito@berkeley.edu Wed Nov 29 17:18:43 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!berkeley!jito From: jito@berkeley.edu (Jens Ito) Newsgroups: comp.dsp Subject: Re: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Nov29.171843.7194@berkeley.edu> Date: Wed, 29 Nov 1995 17:18:43 GMT References: <1995Nov26.112343.5863@utexas.edu> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Nov26.112343.5863@utexas.edu>, vdubois@utexas.edu (Valeria Dubois) 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. -- === Jens Ito === Dept of Electrical Engineering, UC Berkeley Department of EECS "Hold for relay." From jkowalski@tum.de Thu Nov 30 04:46:43 1995 Path: ashpoly!cascade!bigsur!tum!jkowalski From: jkowalski@tum.de (Jens Kowalski) Newsgroups: comp.dsp Subject: Re: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Nov30.044643.2745@tum.de> Date: Thu, 30 Nov 1995 04:46:43 GMT References: <1995Nov26.112343.5863@utexas.edu> <1995Nov29.171843.7194@berkeley.edu> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Nov29.171843.7194@berkeley.edu>, jito@berkeley.edu (Jens Ito) writes: > The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. -- Jens Kowalski US Robotics Courier V.34 @ 28,800 bps "Hardware is temporary. The signal survives."