From nkowalski@cern.ch Tue Aug 16 13:42:47 1994 Path: ashpoly!cascade!bigsur!cern!nkowalski From: nkowalski@cern.ch (Nadia Kowalski) Newsgroups: comp.dsp Subject: [SPECULATION] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Aug16.134247.6064@cern.ch> Date: Tue, 16 Aug 1994 13:42:47 GMT Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: TIN [version 1.2 PL2] Lines: 10 Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization. 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. -- Nadia Kowalski -- European Laboratory for Particle Physics, Geneva "Marcus is not one man." From lvasiliev@delphi.com Wed Aug 17 03:43:47 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!delphi!lvasiliev From: lvasiliev@delphi.com (Lars Vasiliev) Newsgroups: comp.dsp Subject: Re: [SPECULATION] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Aug17.034347.2587@delphi.com> Date: Wed, 17 Aug 1994 03:43:47 GMT References: <1994Aug16.134247.6064@cern.ch> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Aug16.134247.6064@cern.ch>, nkowalski@cern.ch (Nadia Kowalski) writes: > Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! -- Lars Vasiliev *PLONK* filter active for trolls. Commodore Amiga 500 (1MB OCS) - NetBSD 1.0