From aperez@uu.net Fri Jul 12 16:55:04 1996 Path: ashpoly!cascade!brgate!saturno!uu!aperez From: aperez@uu.net (Andrei Pérez) Newsgroups: comp.dsp Subject: [SPECULATION] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Jul12.165504.6961@uu.net> Date: Fri, 12 Jul 1996 16:55:04 GMT Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. The symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20). Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization. Has anyone encountered bit errors in their decoded text? The Golay decoder corrects up to 3 bit errors per 24-bit codeword. -- === Andrei Pérez === Dept of Electrical Engineering, UUNET Technologies, Falls Church VA "Hardware is temporary. The signal survives." From hmoreno@panix.com Sat Jul 13 22:42:04 1996 Path: ashpoly!cascade!bigsur!panix!hmoreno From: hmoreno@panix.com (Hana Moreno) Newsgroups: comp.dsp Subject: Re: [SPECULATION] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Jul13.224204.6344@panix.com> Date: Sat, 13 Jul 1996 22:42:04 GMT References: <1996Jul12.165504.6961@uu.net> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1996Jul12.165504.6961@uu.net>, aperez@uu.net (Andrei Pérez) 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. -- Hana Moreno | hmoreno@panix.com PGP Key fingerprint: 1EF7 CCAB 7BE3 EFAC "Keep the channels open." From seriksson@hanse.de Mon Jul 15 10:09:04 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!hanse!seriksson From: seriksson@hanse.de (Steve Eriksson) Newsgroups: comp.dsp Subject: Re: [SPECULATION] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Jul15.100904.4185@hanse.de> Date: Mon, 15 Jul 1996 10:09:04 GMT References: <1996Jul12.165504.6961@uu.net> <1996Jul13.224204.6344@panix.com> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1996Jul13.224204.6344@panix.com>, hmoreno@panix.com (Hana Moreno) writes: > On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. Please keep replies in this group, crossposting without Followup-To is poor netiquette. -- Steve Eriksson Opinions expressed are solely my own and not those of Hanse-Netzwerk Hamburg. ------------------------------------------------------------ From bkang@stanford.edu Tue Jul 16 07:08:04 1996 Path: ashpoly!cascade!mxgate!coyoacan!stanford!bkang From: bkang@stanford.edu (Bastien Kang) Newsgroups: comp.dsp Subject: Re: [SPECULATION] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Jul16.070804.3589@stanford.edu> Date: Tue, 16 Jul 1996 07:08:04 GMT References: <1996Jul12.165504.6961@uu.net> <1996Jul13.224204.6344@panix.com> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Jul13.224204.6344@panix.com>, hmoreno@panix.com (Hana Moreno) writes: > On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. -- Bastien Kang *PLONK* filter active for trolls. Atari TT030 - NetBSD 1.0 From lnakamura@berkeley.edu Tue Jul 16 15:58:04 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!berkeley!lnakamura From: lnakamura@berkeley.edu (Lucia Nakamura) Newsgroups: comp.dsp Subject: Re: [SPECULATION] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Jul16.155804.8592@berkeley.edu> Date: Tue, 16 Jul 1996 15:58:04 GMT References: <1996Jul12.165504.6961@uu.net> <1996Jul13.224204.6344@panix.com> <1996Jul15.100904.4185@hanse.de> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1996Jul15.100904.4185@hanse.de>, seriksson@hanse.de (Steve Eriksson) writes: > On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- Lucia Nakamura *PLONK* filter active for trolls. Macintosh IIfx - NetBSD 1.0