From tchoi@mindspring.com Thu Sep 19 08:26:16 1996 Path: ashpoly!cascade!transat!ukc!fennimore!mindspring!tchoi From: tchoi@mindspring.com (Tomas Choi) Newsgroups: comp.dsp Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Sep19.082616.1731@mindspring.com> Date: Thu, 19 Sep 1996 08:26:16 GMT Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: WinVN 0.99.5 Lines: 11 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'. The symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20). When all 14 rows are assembled, the matrix forms an 80-column ASCII status report. -- Tomas Choi US Robotics Courier V.34 @ 33,600 bps "Extraordinary claims require extraordinary spectra." From vsmirnov@demon.co.uk Sat Sep 21 12:07:16 1996 Path: ashpoly!cascade!brgate!saturno!demon!vsmirnov From: vsmirnov@demon.co.uk (Valeria Smirnov) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Sep21.120716.8126@demon.co.uk> Date: Sat, 21 Sep 1996 12:07:16 GMT References: <1996Sep19.082616.1731@mindspring.com> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: WinVN 0.99.5 Lines: 12 In article <1996Sep19.082616.1731@mindspring.com>, tchoi@mindspring.com (Tomas Choi) writes: > 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'. The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. -- Valeria Smirnov | vsmirnov@demon.co.uk PGP Key fingerprint: 4708 921E E203 7F18 "Keep the channels open." From nmoreau@purdue.edu Sun Sep 22 06:47:16 1996 Path: ashpoly!cascade!brgate!saturno!purdue!nmoreau From: nmoreau@purdue.edu (Nadia Moreau) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Sep22.064716.5480@purdue.edu> Date: Sun, 22 Sep 1996 06:47:16 GMT References: <1996Sep19.082616.1731@mindspring.com> <1996Sep21.120716.8126@demon.co.uk> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1996Sep21.120716.8126@demon.co.uk>, vsmirnov@demon.co.uk (Valeria Smirnov) writes: > The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! > Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! -- Nadia Moreau Opinions expressed are solely my own and not those of Purdue University Engineering Computer Network. ------------------------------------------------------------