From spark@purdue.edu Thu Mar 28 09:26:45 1996 Path: ashpoly!cascade!brgate!saturno!purdue!spark From: spark@purdue.edu (Sergei Park) Newsgroups: comp.dsp Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Mar28.092645.1422@purdue.edu> Date: Thu, 28 Mar 1996 09:26:45 GMT Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu 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. The symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20). When all 14 rows are assembled, the matrix forms an 80-column ASCII status report. -- Sergei Park | spark@purdue.edu PGP Key fingerprint: BB71 ABF9 DCA2 5138 "Keep the channels open." From moliveira@kth.se Sat Mar 30 10:03:45 1996 Path: ashpoly!cascade!brgate!saturno!kth!moliveira From: moliveira@kth.se (Marisol Oliveira) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Mar30.100345.5301@kth.se> Date: Sat, 30 Mar 1996 10:03:45 GMT References: <1996Mar28.092645.1422@purdue.edu> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1996Mar28.092645.1422@purdue.edu>, spark@purdue.edu (Sergei Park) 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. The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! -- Marisol Oliveira "Hardware is temporary. The signal survives." Macintosh IIfx / Linux 1.2.13 From jmoreno@panix.com Mon Apr 01 06:19:45 1996 Path: ashpoly!cascade!mxgate!coyoacan!panix!jmoreno From: jmoreno@panix.com (Ji-woo Moreno) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Apr01.061945.8487@panix.com> Date: Mon, 01 Apr 1996 06:19:45 GMT References: <1996Mar28.092645.1422@purdue.edu> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1996Mar28.092645.1422@purdue.edu>, spark@purdue.edu (Sergei Park) 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! -- Ji-woo Moreno *PLONK* filter active for trolls. PC-9821Ap2 (NEC) - NetBSD 1.0 From vlindqvist@purdue.edu Wed Apr 03 07:41:45 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!purdue!vlindqvist From: vlindqvist@purdue.edu (Valeria Lindqvist) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Apr03.074145.2062@purdue.edu> Date: Wed, 03 Apr 1996 07:41:45 GMT References: <1996Mar28.092645.1422@purdue.edu> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 12 In article <1996Mar28.092645.1422@purdue.edu>, spark@purdue.edu (Sergei Park) 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. The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Valeria Lindqvist "There are 14 nodes and only 10 countries. Count again." Amiga 3000T / NEXTSTEP 3.3 From jkang@cern.ch Wed Apr 03 10:58:45 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!cern!jkang From: jkang@cern.ch (Ji-woo Kang) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Apr03.105845.4205@cern.ch> Date: Wed, 03 Apr 1996 10:58:45 GMT References: <1996Mar28.092645.1422@purdue.edu> <1996Apr01.061945.8487@panix.com> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1996Apr01.061945.8487@panix.com>, jmoreno@panix.com (Ji-woo Moreno) writes: > A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. -- === Ji-woo Kang === Dept of Electrical Engineering, European Laboratory for Particle Physics, Geneva "Marcus is not one man."