From alaurent@uni-hamburg.de Fri Jun 28 18:39:24 1996 Path: ashpoly!cascade!transat!ukc!fennimore!uni-hamburg!alaurent From: alaurent@uni-hamburg.de (Astrid Laurent) Newsgroups: comp.dsp Subject: [SPECULATION] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Jun28.183924.6152@uni-hamburg.de> Date: Fri, 28 Jun 1996 18:39:24 GMT Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de 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 symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20). The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code. When all 14 rows are assembled, the matrix forms an 80-column ASCII status report. -- Astrid Laurent "A soul is not exclusive to biology." 486DX4/100 (FreeBSD 2.0.5) / System 7.5.1 From mpark@ox.ac.uk Sat Jun 29 23:40:24 1996 Path: ashpoly!cascade!brgate!saturno!ox!mpark From: mpark@ox.ac.uk (Mathieu Park) Newsgroups: comp.dsp Subject: Re: [SPECULATION] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Jun29.234024.4201@ox.ac.uk> Date: Sat, 29 Jun 1996 23:40:24 GMT References: <1996Jun28.183924.6152@uni-hamburg.de> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: WinVN 0.99.5 Lines: 12 In article <1996Jun28.183924.6152@uni-hamburg.de>, alaurent@uni-hamburg.de (Astrid Laurent) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. > The symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20). A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! Unsubscribe me from this list! (Wait, this is Usenet, never mind). -- Mathieu Park | mpark@ox.ac.uk PGP Key fingerprint: 7CDE 9C1E 13D6 DD5E "Keep the channels open." From mpopov@tum.de Sun Jun 30 13:37:24 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!tum!mpopov From: mpopov@tum.de (Mei Popov) Newsgroups: comp.dsp Subject: Re: [SPECULATION] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Jun30.133724.5586@tum.de> Date: Sun, 30 Jun 1996 13:37:24 GMT References: <1996Jun28.183924.6152@uni-hamburg.de> <1996Jun29.234024.4201@ox.ac.uk> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1996Jun29.234024.4201@ox.ac.uk>, mpark@ox.ac.uk (Mathieu Park) writes: > A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. -- Mei Popov "They will send a copy in my place." Atari Falcon 030 / FreeBSD 2.1