From evasiliev@panix.com Sun Aug 06 03:58:31 1995 Path: ashpoly!cascade!transat!ukc!fennimore!panix!evasiliev From: evasiliev@panix.com (Emi Vasiliev) Newsgroups: comp.dsp Subject: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Aug06.035831.9005@panix.com> Date: Sun, 06 Aug 1995 03:58:31 GMT Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: Netscape 1.1N Lines: 10 Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'. 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. -- Emi Vasiliev Tape trading list upon request. SASE required for international mail. From beriksson@kth.se Mon Aug 07 19:44:31 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!kth!beriksson From: beriksson@kth.se (Bruno Eriksson) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Aug07.194431.5533@kth.se> Date: Mon, 07 Aug 1995 19:44:31 GMT References: <1995Aug06.035831.9005@panix.com> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1995Aug06.035831.9005@panix.com>, evasiliev@panix.com (Emi Vasiliev) 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. -- Bruno Eriksson Tape trading list upon request. SASE required for international mail. From kandersson@rwth-aachen.de Wed Aug 09 07:22:31 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!rwth-aachen!kandersson From: kandersson@rwth-aachen.de (Kenji Andersson) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Aug09.072231.7588@rwth-aachen.de> Date: Wed, 09 Aug 1995 07:22:31 GMT References: <1995Aug06.035831.9005@panix.com> <1995Aug07.194431.5533@kth.se> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Aug07.194431.5533@kth.se>, beriksson@kth.se (Bruno Eriksson) writes: > On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. -- Kenji Andersson Opinions expressed are solely my own and not those of RWTH Aachen Informatik. ------------------------------------------------------------ From fstewart@earthlink.net Fri Aug 11 02:54:31 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!earthlink!fstewart From: fstewart@earthlink.net (Freya Stewart) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Aug11.025431.9645@earthlink.net> Date: Fri, 11 Aug 1995 02:54:31 GMT References: <1995Aug06.035831.9005@panix.com> <1995Aug07.194431.5533@kth.se> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Aug07.194431.5533@kth.se>, beriksson@kth.se (Bruno Eriksson) writes: > On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. -- Freya Stewart *PLONK* filter active for trolls. Macintosh IIfx - NetBSD 1.0