From kgarcia@netcom.com Wed Sep 27 18:41:32 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!netcom!kgarcia From: kgarcia@netcom.com (Katrin García) Newsgroups: comp.dsp Subject: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Sep27.184132.9067@netcom.com> Date: Wed, 27 Sep 1995 18:41:32 GMT Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: Netscape 1.1N 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. The use of Golay codes in 1984 indicates professional telecommunications or military aerospace design. -- Katrin García *PLONK* filter active for trolls. Atari TT030 - NetBSD 1.0 From seriksson@cmu.edu Thu Sep 28 11:00:32 1995 Path: ashpoly!cascade!bigsur!cmu!seriksson From: seriksson@cmu.edu (Sun-mi Eriksson) Newsgroups: comp.dsp Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Sep28.110032.8108@cmu.edu> Date: Thu, 28 Sep 1995 11:00:32 GMT References: <1995Sep27.184132.9067@netcom.com> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Sep27.184132.9067@netcom.com>, kgarcia@netcom.com (Katrin García) 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! -- Sun-mi Eriksson US Robotics Courier V.34 @ 33,600 bps "Hardware is temporary. The signal survives."