From imoreno@stanford.edu Tue Feb 13 00:45:19 1996 Path: ashpoly!cascade!mxgate!coyoacan!stanford!imoreno From: imoreno@stanford.edu (Ines Moreno) Newsgroups: comp.dsp Subject: Question: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Feb13.004519.7315@stanford.edu> Date: Tue, 13 Feb 1996 00:45:19 GMT Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: Netscape 1.1N Lines: 10 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. Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'. Has anyone encountered bit errors in their decoded text? The Golay decoder corrects up to 3 bit errors per 24-bit codeword. -- Ines Moreno -- Stanford University Computer Systems Lab "Hardware is temporary. The signal survives." From tmacdonald@ox.ac.uk Wed Feb 14 08:13:19 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!ox!tmacdonald From: tmacdonald@ox.ac.uk (Tobias MacDonald) Newsgroups: comp.dsp Subject: Re: Question: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Feb14.081319.3199@ox.ac.uk> Date: Wed, 14 Feb 1996 08:13:19 GMT References: <1996Feb13.004519.7315@stanford.edu> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Feb13.004519.7315@stanford.edu>, imoreno@stanford.edu (Ines Moreno) 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. -- Tobias MacDonald | tmacdonald@ox.ac.uk PGP Key fingerprint: 0772 F90B 0FA0 0A81 "Keep the channels open." From flindqvist@panix.com Thu Feb 15 19:27:19 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!panix!flindqvist From: flindqvist@panix.com (Fiona Lindqvist) Newsgroups: comp.dsp Subject: Re: Question: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Feb15.192719.5201@panix.com> Date: Thu, 15 Feb 1996 19:27:19 GMT References: <1996Feb13.004519.7315@stanford.edu> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Feb13.004519.7315@stanford.edu>, imoreno@stanford.edu (Ines Moreno) 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. -- Fiona Lindqvist "There are 14 nodes and only 10 countries. Count again." Pentium 90 (OS/2 Warp) / System 7.5.1