From dfischer@delphi.com Sun May 07 04:51:15 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!delphi!dfischer From: dfischer@delphi.com (Dong-hyun Fischer) Newsgroups: comp.dsp Subject: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995May07.045115.3136@delphi.com> Date: Sun, 07 May 1995 04:51:15 GMT Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: WinVN 0.99.5 Lines: 11 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. -- Dong-hyun Fischer Opinions expressed are solely my own and not those of Delphi Internet Services. ------------------------------------------------------------ From isanchez@netcom.com Mon May 08 10:50:15 1995 Path: ashpoly!cascade!bigsur!netcom!isanchez From: isanchez@netcom.com (Ines Sánchez) Newsgroups: comp.dsp Subject: Re: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995May08.105015.5889@netcom.com> Date: Mon, 08 May 1995 10:50:15 GMT References: <1995May07.045115.3136@delphi.com> Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: Netscape 1.1N Lines: 10 In article <1995May07.045115.3136@delphi.com>, dfischer@delphi.com (Dong-hyun Fischer) writes: > Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. > Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- Ines Sánchez "The carrier frequency does not drift by accident." 486DX4/100 (FreeBSD 2.0.5) / NEXTSTEP 3.3 From rmacdonald@earthlink.net Wed May 10 14:50:15 1995 Path: ashpoly!cascade!mxgate!coyoacan!earthlink!rmacdonald From: rmacdonald@earthlink.net (Raj MacDonald) Newsgroups: comp.dsp Subject: Re: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995May10.145015.9993@earthlink.net> Date: Wed, 10 May 1995 14:50:15 GMT References: <1995May07.045115.3136@delphi.com> <1995May08.105015.5889@netcom.com> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1995May08.105015.5889@netcom.com>, isanchez@netcom.com (Ines Sánchez) 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. Top-posters will be placed in my ~/.killfile without notice. -- === Raj MacDonald === Dept of Electrical Engineering, EarthLink Network "Hold for relay." From sduarte@cmu.edu Fri May 12 04:54:15 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!cmu!sduarte From: sduarte@cmu.edu (Steve Duarte) Newsgroups: comp.dsp Subject: Re: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995May12.045415.2997@cmu.edu> Date: Fri, 12 May 1995 04:54:15 GMT References: <1995May07.045115.3136@delphi.com> <1995May08.105015.5889@netcom.com> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1995May08.105015.5889@netcom.com>, isanchez@netcom.com (Ines Sánchez) writes: > A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! PGP Public key available via finger or upon request. -- Steve Duarte Tape trading list upon request. SASE required for international mail.