From erodriguez@kth.se Thu Jul 04 10:50:12 1996 Path: ashpoly!cascade!brgate!saturno!kth!erodriguez From: erodriguez@kth.se (Emi Rodríguez) Newsgroups: comp.dsp Subject: Question: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Jul04.105012.5938@kth.se> Date: Thu, 04 Jul 1996 10:50:12 GMT Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. 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. When all 14 rows are assembled, the matrix forms an 80-column ASCII status report. -- Emi Rodríguez *PLONK* filter active for trolls. Atari TT030 - NetBSD 1.0 From tpopov@delphi.com Thu Jul 04 18:56:12 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!delphi!tpopov From: tpopov@delphi.com (Tobias Popov) Newsgroups: comp.dsp Subject: Re: Question: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Jul04.185612.2373@delphi.com> Date: Thu, 04 Jul 1996 18:56:12 GMT References: <1996Jul04.105012.5938@kth.se> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1996Jul04.105012.5938@kth.se>, erodriguez@kth.se (Emi Rodríguez) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. > The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code. On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. -- Tobias Popov Practical Peripherals 14.4 @ 14,400 bps "There are 14 nodes and only 10 countries. Count again." From mmoreau@hanse.de Fri Jul 05 17:45:12 1996 Path: ashpoly!cascade!mxgate!coyoacan!hanse!mmoreau From: mmoreau@hanse.de (Marta Moreau) Newsgroups: comp.dsp Subject: Re: Question: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Jul05.174512.5118@hanse.de> Date: Fri, 05 Jul 1996 17:45:12 GMT References: <1996Jul04.105012.5938@kth.se> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1996Jul04.105012.5938@kth.se>, erodriguez@kth.se (Emi Rodríguez) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! If you are posting from AOL, please read RFC 1036 before posting again. -- Marta Moreau Tape trading list upon request. SASE required for international mail.