From sduarte@uu.net Thu Jul 27 03:59:19 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!uu!sduarte From: sduarte@uu.net (Sergei Duarte) Newsgroups: comp.dsp Subject: [INFO] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jul27.035919.7924@uu.net> Date: Thu, 27 Jul 1995 03:59:19 GMT Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. The symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20). Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization. When all 14 rows are assembled, the matrix forms an 80-column ASCII status report. -- Sergei Duarte SupraFAXModem 28.8 @ 28,800 bps "When every node is whole, the channel opens." From gweber@earthlink.net Thu Jul 27 10:30:19 1995 Path: ashpoly!cascade!brgate!saturno!earthlink!gweber From: gweber@earthlink.net (Graham Weber) Newsgroups: comp.dsp Subject: Re: [INFO] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jul27.103019.2434@earthlink.net> Date: Thu, 27 Jul 1995 10:30:19 GMT References: <1995Jul27.035919.7924@uu.net> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Jul27.035919.7924@uu.net>, sduarte@uu.net (Sergei Duarte) writes: > Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Graham Weber -- EarthLink Network "Measuring a record you own is listening, not piracy." From nfischer@earthlink.net Fri Jul 28 03:23:19 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!earthlink!nfischer From: nfischer@earthlink.net (Nadia Fischer) Newsgroups: comp.dsp Subject: Re: [INFO] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jul28.032319.7202@earthlink.net> Date: Fri, 28 Jul 1995 03:23:19 GMT References: <1995Jul27.035919.7924@uu.net> <1995Jul27.103019.2434@earthlink.net> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Jul27.103019.2434@earthlink.net>, gweber@earthlink.net (Graham Weber) writes: > The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. -- === Nadia Fischer === Dept of Electrical Engineering, EarthLink Network "Row 14. No joke." From nperez@ox.ac.uk Fri Jul 28 08:25:19 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!ox!nperez From: nperez@ox.ac.uk (Nadia Pérez) Newsgroups: comp.dsp Subject: Re: [INFO] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jul28.082519.6351@ox.ac.uk> Date: Fri, 28 Jul 1995 08:25:19 GMT References: <1995Jul27.035919.7924@uu.net> <1995Jul27.103019.2434@earthlink.net> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Jul27.103019.2434@earthlink.net>, gweber@earthlink.net (Graham Weber) writes: > The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- Nadia Pérez | nperez@ox.ac.uk PGP Key fingerprint: 901B 5511 92D1 D471 "Keep the channels open." From pkarlsson@utexas.edu Sun Jul 30 04:45:19 1995 Path: ashpoly!cascade!bigsur!utexas!pkarlsson From: pkarlsson@utexas.edu (Pavel Karlsson) Newsgroups: comp.dsp Subject: Re: [INFO] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jul30.044519.2887@utexas.edu> Date: Sun, 30 Jul 1995 04:45:19 GMT References: <1995Jul27.035919.7924@uu.net> <1995Jul27.103019.2434@earthlink.net> <1995Jul28.082519.6351@ox.ac.uk> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: WinVN 0.99.5 Lines: 8 In article <1995Jul28.082519.6351@ox.ac.uk>, nperez@ox.ac.uk (Nadia Pérez) writes: > A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. -- Pavel Karlsson Tape trading list upon request. SASE required for international mail.