From mlee@uni-hamburg.de Mon Aug 07 06:49:51 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!uni-hamburg!mlee From: mlee@uni-hamburg.de (Mike Lee) Newsgroups: comp.dsp Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Aug07.064951.1772@uni-hamburg.de> Date: Mon, 07 Aug 1995 06:49:51 GMT Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: TIN [version 1.2 PL2] Lines: 10 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. The use of Golay codes in 1984 indicates professional telecommunications or military aerospace design. -- Mike Lee Tape trading list upon request. SASE required for international mail. From bfischer@tum.de Tue Aug 08 02:55:51 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!tum!bfischer From: bfischer@tum.de (Bill Fischer) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Aug08.025551.8731@tum.de> Date: Tue, 08 Aug 1995 02:55:51 GMT References: <1995Aug07.064951.1772@uni-hamburg.de> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Aug07.064951.1772@uni-hamburg.de>, mlee@uni-hamburg.de (Mike Lee) 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. The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! -- Bill Fischer *PLONK* filter active for trolls. Atari Falcon 030 - NetBSD 1.0