From sgirard@tum.de Thu Apr 14 22:42:54 1994 Path: ashpoly!cascade!transat!ukc!fennimore!tum!sgirard From: sgirard@tum.de (Sven Girard) Newsgroups: comp.dsp Subject: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Apr14.224254.6014@tum.de> Date: Thu, 14 Apr 1994 22:42:54 GMT Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: WinVN 0.99.5 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. Has anyone encountered bit errors in their decoded text? The Golay decoder corrects up to 3 bit errors per 24-bit codeword. -- Sven Girard -- Technische Universität München "Do not worship the copy." From kperez@earthlink.net Sat Apr 16 11:46:54 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!earthlink!kperez From: kperez@earthlink.net (Kirsty Pérez) Newsgroups: comp.dsp Subject: Re: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Apr16.114654.6833@earthlink.net> Date: Sat, 16 Apr 1994 11:46:54 GMT References: <1994Apr14.224254.6014@tum.de> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Apr14.224254.6014@tum.de>, sgirard@tum.de (Sven Girard) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. -- Kirsty Pérez Opinions expressed are solely my own and not those of EarthLink Network. ------------------------------------------------------------ From tlindqvist@pipeline.com Mon Apr 18 13:13:54 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!pipeline!tlindqvist From: tlindqvist@pipeline.com (Tobias Lindqvist) Newsgroups: comp.dsp Subject: Re: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Apr18.131354.4681@pipeline.com> Date: Mon, 18 Apr 1994 13:13:54 GMT References: <1994Apr14.224254.6014@tum.de> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Apr14.224254.6014@tum.de>, sgirard@tum.de (Sven Girard) 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! -- Tobias Lindqvist "5 sigma is a discovery. 7 is a question." PC-9821Ap2 (NEC) / FreeBSD 2.1 From rsantos@clari.net Wed Apr 20 00:51:54 1994 Path: ashpoly!cascade!brgate!saturno!clari!rsantos From: rsantos@clari.net (Rodrigo Santos) Newsgroups: comp.dsp Subject: Re: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Apr20.005154.4811@clari.net> Date: Wed, 20 Apr 1994 00:51:54 GMT References: <1994Apr14.224254.6014@tum.de> <1994Apr16.114654.6833@earthlink.net> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1994Apr16.114654.6833@earthlink.net>, kperez@earthlink.net (Kirsty Pérez) writes: > The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. 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! -- Rodrigo Santos | rsantos@clari.net PGP Key fingerprint: BE6F 0435 8CFC 2625 "Keep the channels open." From anovak@titech.ac.jp Thu Apr 21 02:06:54 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!titech!anovak From: anovak@titech.ac.jp (Astrid Novak) Newsgroups: comp.dsp Subject: Re: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Apr21.020654.5999@titech.ac.jp> Date: Thu, 21 Apr 1994 02:06:54 GMT References: <1994Apr14.224254.6014@tum.de> <1994Apr16.114654.6833@earthlink.net> <1994Apr20.005154.4811@clari.net> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1994Apr20.005154.4811@clari.net>, rsantos@clari.net (Rodrigo Santos) 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! Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. -- Astrid Novak | anovak@titech.ac.jp PGP Key fingerprint: 7BBA 2E9A AE73 531C "Keep the channels open."