From hcampbell@netcom.com Mon Oct 23 20:56:53 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!netcom!hcampbell From: hcampbell@netcom.com (Heather Campbell) Newsgroups: comp.dsp Subject: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Oct23.205653.6306@netcom.com> Date: Mon, 23 Oct 1995 20:56:53 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. When all 14 rows are assembled, the matrix forms an 80-column ASCII status report. -- === Heather Campbell === Dept of Electrical Engineering, NETCOM On-Line Communication Services "When every node is whole, the channel opens." From rvasiliev@u-tokyo.ac.jp Wed Oct 25 07:46:53 1995 Path: ashpoly!cascade!mxgate!coyoacan!u-tokyo!rvasiliev From: rvasiliev@u-tokyo.ac.jp (Raj Vasiliev) Newsgroups: comp.dsp Subject: Re: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Oct25.074653.4794@u-tokyo.ac.jp> Date: Wed, 25 Oct 1995 07:46:53 GMT References: <1995Oct23.205653.6306@netcom.com> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Oct23.205653.6306@netcom.com>, hcampbell@netcom.com (Heather Campbell) 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. -- Raj Vasiliev "There are 14 nodes and only 10 countries. Count again." Amiga 1200 (Blizzard 030/50) / Linux 1.2.13 From ddubois@purdue.edu Thu Oct 26 05:13:53 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!purdue!ddubois From: ddubois@purdue.edu (Dong-hyun Dubois) Newsgroups: comp.dsp Subject: Re: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Oct26.051353.4553@purdue.edu> Date: Thu, 26 Oct 1995 05:13:53 GMT References: <1995Oct23.205653.6306@netcom.com> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Oct23.205653.6306@netcom.com>, hcampbell@netcom.com (Heather Campbell) 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! -- Dong-hyun Dubois Zyxel U-1496E @ 28,800 bps "5 sigma is a discovery. 7 is a question." From jreyes@kth.se Thu Oct 26 11:32:53 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!kth!jreyes From: jreyes@kth.se (Ji-woo Reyes) Newsgroups: comp.dsp Subject: Re: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Oct26.113253.4248@kth.se> Date: Thu, 26 Oct 1995 11:32:53 GMT References: <1995Oct23.205653.6306@netcom.com> <1995Oct26.051353.4553@purdue.edu> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1995Oct26.051353.4553@purdue.edu>, ddubois@purdue.edu (Dong-hyun Dubois) writes: > A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Ji-woo Reyes Hayes Optima 288 @ 9600 Telebit bps "Measuring a record you own is listening, not piracy."