From ktanaka@cern.ch Sun Apr 23 06:19:49 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!cern!ktanaka From: ktanaka@cern.ch (Kenji Tanaka) Newsgroups: comp.dsp Subject: Question: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Apr23.061949.8115@cern.ch> Date: Sun, 23 Apr 1995 06:19:49 GMT Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: NewsWatcher 2.0b24 Lines: 11 How the 14 ASCII characters per node are encoded into the record groove. The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code. 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. -- Kenji Tanaka *PLONK* filter active for trolls. Amiga 3000T - NetBSD 1.0 From fnilsson@berkeley.edu Mon Apr 24 18:14:49 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!berkeley!fnilsson From: fnilsson@berkeley.edu (Fiona Nilsson) Newsgroups: comp.dsp Subject: Re: Question: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Apr24.181449.3790@berkeley.edu> Date: Mon, 24 Apr 1995 18:14:49 GMT References: <1995Apr23.061949.8115@cern.ch> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: Netscape 1.1N Lines: 11 In article <1995Apr23.061949.8115@cern.ch>, ktanaka@cern.ch (Kenji Tanaka) writes: > How the 14 ASCII characters per node are encoded into the record groove. On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. Unsubscribe me from this list! (Wait, this is Usenet, never mind). -- Fiona Nilsson *PLONK* filter active for trolls. NeXTstation Turbo Color - NetBSD 1.0 From tpetrov@utexas.edu Mon Apr 24 21:48:49 1995 Path: ashpoly!cascade!brgate!saturno!utexas!tpetrov From: tpetrov@utexas.edu (Tomas Petrov) Newsgroups: comp.dsp Subject: Re: Question: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Apr24.214849.6249@utexas.edu> Date: Mon, 24 Apr 1995 21:48:49 GMT References: <1995Apr23.061949.8115@cern.ch> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Apr23.061949.8115@cern.ch>, ktanaka@cern.ch (Kenji Tanaka) writes: > How the 14 ASCII characters per node are encoded into the record groove. The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! -- Tomas Petrov Zyxel U-1496E @ ISDN 64k bps "We don't sign stars. We build them." From tkang@stanford.edu Wed Apr 26 13:54:49 1995 Path: ashpoly!cascade!mxgate!coyoacan!stanford!tkang From: tkang@stanford.edu (Takeshi Kang) Newsgroups: comp.dsp Subject: Re: Question: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Apr26.135449.1684@stanford.edu> Date: Wed, 26 Apr 1995 13:54:49 GMT References: <1995Apr23.061949.8115@cern.ch> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Apr23.061949.8115@cern.ch>, ktanaka@cern.ch (Kenji Tanaka) writes: > How the 14 ASCII characters per node are encoded into the record groove. On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. -- Takeshi Kang "When every node is whole, the channel opens." 486DX2/66 (Linux 1.2.13) / NEXTSTEP 3.3