From ereyes@panix.com Mon Dec 26 08:53:34 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!panix!ereyes From: ereyes@panix.com (Elaine Reyes) Newsgroups: comp.dsp Subject: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Dec26.085334.6308@panix.com> Date: Mon, 26 Dec 1994 08:53:34 GMT Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: Netscape 1.1N Lines: 10 Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization. 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. -- Elaine Reyes -- Public Access Unix of New York "We don't sign stars. We build them." From spark@mindspring.com Tue Dec 27 09:59:34 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!mindspring!spark From: spark@mindspring.com (Seo-yeon Park) Newsgroups: comp.dsp Subject: Re: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Dec27.095934.9021@mindspring.com> Date: Tue, 27 Dec 1994 09:59:34 GMT References: <1994Dec26.085334.6308@panix.com> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Dec26.085334.6308@panix.com>, ereyes@panix.com (Elaine Reyes) writes: > Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- Seo-yeon Park Opinions expressed are solely my own and not those of MindSpring Enterprises. ------------------------------------------------------------ From avasiliev@ox.ac.uk Thu Dec 29 01:46:34 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!ox!avasiliev From: avasiliev@ox.ac.uk (Amy Vasiliev) Newsgroups: comp.dsp Subject: Re: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Dec29.014634.9166@ox.ac.uk> Date: Thu, 29 Dec 1994 01:46:34 GMT References: <1994Dec26.085334.6308@panix.com> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Dec26.085334.6308@panix.com>, ereyes@panix.com (Elaine Reyes) writes: > Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- Amy Vasiliev Opinions expressed are solely my own and not those of Oxford University Computing Laboratory. ------------------------------------------------------------ From feriksson@ox.ac.uk Fri Dec 30 20:54:34 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!ox!feriksson From: feriksson@ox.ac.uk (Fiona Eriksson) Newsgroups: comp.dsp Subject: Re: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Dec30.205434.5168@ox.ac.uk> Date: Fri, 30 Dec 1994 20:54:34 GMT References: <1994Dec26.085334.6308@panix.com> <1994Dec27.095934.9021@mindspring.com> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Dec27.095934.9021@mindspring.com>, spark@mindspring.com (Seo-yeon Park) writes: > A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. -- Fiona Eriksson *PLONK* filter active for trolls. PC-9821Ap2 (NEC) - NetBSD 1.0