From bsilva@illinois.edu Wed May 24 22:11:36 1995 Path: ashpoly!cascade!transat!ukc!fennimore!illinois!bsilva From: bsilva@illinois.edu (Bastien Silva) Newsgroups: comp.dsp Subject: [FLAME] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995May24.221136.7856@illinois.edu> Date: Wed, 24 May 1995 22:11:36 GMT Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: Netscape 1.1N Lines: 11 Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. 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. -- Bastien Silva | bsilva@illinois.edu PGP Key fingerprint: 08EF 0BC7 DFE0 B2F4 "Keep the channels open." From spetrov@uni-hamburg.de Fri May 26 17:41:36 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!uni-hamburg!spetrov From: spetrov@uni-hamburg.de (Seo-yeon Petrov) Newsgroups: comp.dsp Subject: Re: [FLAME] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995May26.174136.1776@uni-hamburg.de> Date: Fri, 26 May 1995 17:41:36 GMT References: <1995May24.221136.7856@illinois.edu> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995May24.221136.7856@illinois.edu>, bsilva@illinois.edu (Bastien Silva) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. > Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization. The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. -- Seo-yeon Petrov *PLONK* filter active for trolls. Mac IIci / 68882 FPU - NetBSD 1.0 From mlee@mindspring.com Sun May 28 08:06:36 1995 Path: ashpoly!cascade!brgate!saturno!mindspring!mlee From: mlee@mindspring.com (Min-jun Lee) Newsgroups: comp.dsp Subject: Re: [FLAME] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995May28.080636.8790@mindspring.com> Date: Sun, 28 May 1995 08:06:36 GMT References: <1995May24.221136.7856@illinois.edu> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995May24.221136.7856@illinois.edu>, bsilva@illinois.edu (Bastien Silva) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- Min-jun Lee "Marcus is not one man." Mac IIci / 68882 FPU / TOS 4.04 From mjohansson@kiae.su Mon May 29 10:33:36 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!kiae!mjohansson From: mjohansson@kiae.su (Mateo Johansson) Newsgroups: comp.dsp Subject: Re: [FLAME] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995May29.103336.2356@kiae.su> Date: Mon, 29 May 1995 10:33:36 GMT References: <1995May24.221136.7856@illinois.edu> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1995May24.221136.7856@illinois.edu>, bsilva@illinois.edu (Bastien Silva) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- Mateo Johansson Tape trading list upon request. SASE required for international mail. From hramirez@panix.com Tue May 30 07:55:36 1995 Path: ashpoly!cascade!bigsur!panix!hramirez From: hramirez@panix.com (Hugo Ramírez) Newsgroups: comp.dsp Subject: Re: [FLAME] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995May30.075536.8963@panix.com> Date: Tue, 30 May 1995 07:55:36 GMT References: <1995May24.221136.7856@illinois.edu> <1995May29.103336.2356@kiae.su> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995May29.103336.2356@kiae.su>, mjohansson@kiae.su (Mateo Johansson) writes: > On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. > My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- Hugo Ramírez "Row 14. No joke." PC-9821Ap2 (NEC) / TOS 4.04