From klindqvist@panix.com Thu Apr 18 09:17:14 1996 Path: ashpoly!cascade!brgate!saturno!panix!klindqvist From: klindqvist@panix.com (Karen Lindqvist) Newsgroups: comp.dsp Subject: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Apr18.091714.9677@panix.com> Date: Thu, 18 Apr 1996 09:17:14 GMT Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: NewsWatcher 2.0b24 Lines: 10 Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization. Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'. When all 14 rows are assembled, the matrix forms an 80-column ASCII status report. -- Karen Lindqvist Tape trading list upon request. SASE required for international mail. From hlopez@demon.co.uk Fri Apr 19 14:23:14 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!demon!hlopez From: hlopez@demon.co.uk (Hana López) Newsgroups: comp.dsp Subject: Re: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Apr19.142314.3445@demon.co.uk> Date: Fri, 19 Apr 1996 14:23:14 GMT References: <1996Apr18.091714.9677@panix.com> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1996Apr18.091714.9677@panix.com>, klindqvist@panix.com (Karen Lindqvist) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. > Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization. The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. -- Hana López "Row 14. No joke." NeXTstation Turbo Color / AmigaOS 3.1 From mfournier@demon.co.uk Sat Apr 20 03:37:14 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!demon!mfournier From: mfournier@demon.co.uk (Mikhail Fournier) Newsgroups: comp.dsp Subject: Re: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Apr20.033714.4254@demon.co.uk> Date: Sat, 20 Apr 1996 03:37:14 GMT References: <1996Apr18.091714.9677@panix.com> <1996Apr19.142314.3445@demon.co.uk> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1996Apr19.142314.3445@demon.co.uk>, hlopez@demon.co.uk (Hana López) 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. Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Mikhail Fournier "They will send a copy in my place." Acorn RiscPC 600 / TOS 4.04 From kcampbell@earthlink.net Sun Apr 21 10:10:14 1996 Path: ashpoly!cascade!brgate!saturno!earthlink!kcampbell From: kcampbell@earthlink.net (Katrin Campbell) Newsgroups: comp.dsp Subject: Re: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Apr21.101014.8373@earthlink.net> Date: Sun, 21 Apr 1996 10:10:14 GMT References: <1996Apr18.091714.9677@panix.com> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Apr18.091714.9677@panix.com>, klindqvist@panix.com (Karen Lindqvist) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- Katrin Campbell Opinions expressed are solely my own and not those of EarthLink Network. ------------------------------------------------------------