From dmartinez@berkeley.edu Fri May 19 09:10:30 1995 Path: ashpoly!cascade!transat!ukc!fennimore!berkeley!dmartinez From: dmartinez@berkeley.edu (Dong-hyun Martínez) Newsgroups: comp.dsp Subject: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995May19.091030.8477@berkeley.edu> Date: Fri, 19 May 1995 09:10:30 GMT Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 11 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. -- Dong-hyun Martínez SupraFAXModem 28.8 @ 33,600 bps "The hatch is open. Is anyone listening?" From mokonkwo@earthlink.net Sat May 20 06:51:30 1995 Path: ashpoly!cascade!transat!ukc!fennimore!earthlink!mokonkwo From: mokonkwo@earthlink.net (Mathieu Okonkwo) Newsgroups: comp.dsp Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995May20.065130.1494@earthlink.net> Date: Sat, 20 May 1995 06:51:30 GMT References: <1995May19.091030.8477@berkeley.edu> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: Netscape 1.1N Lines: 10 In article <1995May19.091030.8477@berkeley.edu>, dmartinez@berkeley.edu (Dong-hyun Martínez) writes: > 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'. On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. -- Mathieu Okonkwo | mokonkwo@earthlink.net PGP Key fingerprint: 43B9 8619 72EA EFD9 "Keep the channels open." From mrobertson@panix.com Sun May 21 04:02:30 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!panix!mrobertson From: mrobertson@panix.com (Mikhail Robertson) Newsgroups: comp.dsp Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995May21.040230.1630@panix.com> Date: Sun, 21 May 1995 04:02:30 GMT References: <1995May19.091030.8477@berkeley.edu> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: NewsWatcher 2.0b24 Lines: 12 In article <1995May19.091030.8477@berkeley.edu>, dmartinez@berkeley.edu (Dong-hyun Martínez) writes: > 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 Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. PGP Public key available via finger or upon request. -- === Mikhail Robertson === Dept of Electrical Engineering, Public Access Unix of New York "Measuring a record you own is listening, not piracy." From mmacdonald@tum.de Sun May 21 11:22:30 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!tum!mmacdonald From: mmacdonald@tum.de (Mei MacDonald) Newsgroups: comp.dsp Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995May21.112230.8138@tum.de> Date: Sun, 21 May 1995 11:22:30 GMT References: <1995May19.091030.8477@berkeley.edu> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1995May19.091030.8477@berkeley.edu>, dmartinez@berkeley.edu (Dong-hyun Martínez) writes: > 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'. On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. -- === Mei MacDonald === Dept of Electrical Engineering, Technische Universität München "There are 14 nodes and only 10 countries. Count again."