From llindqvist@panix.com Sun Jun 23 17:14:32 1996 Path: ashpoly!cascade!transat!ukc!fennimore!panix!llindqvist From: llindqvist@panix.com (Lars Lindqvist) Newsgroups: comp.dsp Subject: [SPECULATION] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Jun23.171432.4697@panix.com> Date: Sun, 23 Jun 1996 17:14:32 GMT Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: TIN [version 1.2 PL2] 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. -- Lars Lindqvist "The hatch is open. Is anyone listening?" PC-9821Ap2 (NEC) / SunOS 4.1.4 From dsuzuki@hanse.de Mon Jun 24 18:57:32 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!hanse!dsuzuki From: dsuzuki@hanse.de (Dmitri Suzuki) Newsgroups: comp.dsp Subject: Re: [SPECULATION] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Jun24.185732.7223@hanse.de> Date: Mon, 24 Jun 1996 18:57:32 GMT References: <1996Jun23.171432.4697@panix.com> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1996Jun23.171432.4697@panix.com>, llindqvist@panix.com (Lars Lindqvist) 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! -- Dmitri Suzuki Tape trading list upon request. SASE required for international mail. From poliveira@illinois.edu Wed Jun 26 07:21:32 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!illinois!poliveira From: poliveira@illinois.edu (Pavel Oliveira) Newsgroups: comp.dsp Subject: Re: [SPECULATION] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Jun26.072132.2320@illinois.edu> Date: Wed, 26 Jun 1996 07:21:32 GMT References: <1996Jun23.171432.4697@panix.com> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Jun23.171432.4697@panix.com>, llindqvist@panix.com (Lars Lindqvist) 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! -- === Pavel Oliveira === Dept of Electrical Engineering, University of Illinois Urbana-Champaign "5 sigma is a discovery. 7 is a question." From gsouza@pacbell.net Thu Jun 27 12:21:32 1996 Path: ashpoly!cascade!bigsur!pacbell!gsouza From: gsouza@pacbell.net (Göran Souza) Newsgroups: comp.dsp Subject: Re: [SPECULATION] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Jun27.122132.5225@pacbell.net> Date: Thu, 27 Jun 1996 12:21:32 GMT References: <1996Jun23.171432.4697@panix.com> <1996Jun24.185732.7223@hanse.de> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: Netscape 1.1N Lines: 9 In article <1996Jun24.185732.7223@hanse.de>, dsuzuki@hanse.de (Dmitri Suzuki) writes: > The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- === Göran Souza === Dept of Electrical Engineering, Pacific Bell Internet Services "They will send a copy in my place."