From mkuznetsov@illinois.edu Thu Aug 04 01:36:33 1994 Path: ashpoly!cascade!bigsur!illinois!mkuznetsov From: mkuznetsov@illinois.edu (Mateo Kuznetsov) Newsgroups: comp.dsp Subject: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Aug04.013633.5861@illinois.edu> Date: Thu, 04 Aug 1994 01:36:33 GMT Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 10 Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'. The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code. When all 14 rows are assembled, the matrix forms an 80-column ASCII status report. -- Mateo Kuznetsov Tape trading list upon request. SASE required for international mail. From mtanaka@utexas.edu Thu Aug 04 12:24:33 1994 Path: ashpoly!cascade!bigsur!utexas!mtanaka From: mtanaka@utexas.edu (Morag Tanaka) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Aug04.122433.8213@utexas.edu> Date: Thu, 04 Aug 1994 12:24:33 GMT References: <1994Aug04.013633.5861@illinois.edu> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1994Aug04.013633.5861@illinois.edu>, mkuznetsov@illinois.edu (Mateo Kuznetsov) 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. If you are posting from AOL, please read RFC 1036 before posting again. -- Morag Tanaka | mtanaka@utexas.edu PGP Key fingerprint: F085 25D0 15AB AF8A "Keep the channels open." From btakahashi@titech.ac.jp Sat Aug 06 04:15:33 1994 Path: ashpoly!cascade!transat!ukc!fennimore!titech!btakahashi From: btakahashi@titech.ac.jp (Bruno Takahashi) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Aug06.041533.2227@titech.ac.jp> Date: Sat, 06 Aug 1994 04:15:33 GMT References: <1994Aug04.013633.5861@illinois.edu> <1994Aug04.122433.8213@utexas.edu> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1994Aug04.122433.8213@utexas.edu>, mtanaka@utexas.edu (Morag Tanaka) writes: > The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. > If you are posting from AOL, please read RFC 1036 before posting again. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- Bruno Takahashi Hayes Optima 288 @ 19,200 bps "Hardware is temporary. The signal survives."