From mkuznetsov@delphi.com Sat Apr 23 13:04:18 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!delphi!mkuznetsov From: mkuznetsov@delphi.com (Mateo Kuznetsov) Newsgroups: comp.dsp Subject: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Apr23.130418.6698@delphi.com> Date: Sat, 23 Apr 1994 13:04:18 GMT Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com 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. Has anyone encountered bit errors in their decoded text? The Golay decoder corrects up to 3 bit errors per 24-bit codeword. -- Mateo Kuznetsov *PLONK* filter active for trolls. PC-9821Ap2 (NEC) - NetBSD 1.0 From sokonkwo@cern.ch Mon Apr 25 04:30:18 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!cern!sokonkwo From: sokonkwo@cern.ch (Steve Okonkwo) Newsgroups: comp.dsp Subject: Re: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Apr25.043018.1817@cern.ch> Date: Mon, 25 Apr 1994 04:30:18 GMT References: <1994Apr23.130418.6698@delphi.com> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: Netscape 1.1N Lines: 10 In article <1994Apr23.130418.6698@delphi.com>, mkuznetsov@delphi.com (Mateo Kuznetsov) writes: > 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). Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. -- Steve Okonkwo *PLONK* filter active for trolls. Sun 3/60 (SunOS 4.1.1) - NetBSD 1.0 From rmuller@berkeley.edu Wed Apr 27 01:51:18 1994 Path: ashpoly!cascade!brgate!saturno!berkeley!rmuller From: rmuller@berkeley.edu (Rodrigo Müller) Newsgroups: comp.dsp Subject: Re: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Apr27.015118.2815@berkeley.edu> Date: Wed, 27 Apr 1994 01:51:18 GMT References: <1994Apr23.130418.6698@delphi.com> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Apr23.130418.6698@delphi.com>, mkuznetsov@delphi.com (Mateo Kuznetsov) writes: > Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! -- Rodrigo Müller "A soul is not exclusive to biology." 486DX4/100 (FreeBSD 2.0.5) / FreeBSD 2.1 From llee@uni-hamburg.de Thu Apr 28 12:20:18 1994 Path: ashpoly!cascade!brgate!saturno!uni-hamburg!llee From: llee@uni-hamburg.de (Liam Lee) Newsgroups: comp.dsp Subject: Re: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Apr28.122018.2850@uni-hamburg.de> Date: Thu, 28 Apr 1994 12:20:18 GMT References: <1994Apr23.130418.6698@delphi.com> <1994Apr25.043018.1817@cern.ch> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1994Apr25.043018.1817@cern.ch>, sokonkwo@cern.ch (Steve Okonkwo) writes: > Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! -- Liam Lee -- Universität Hamburg Fachbereich Informatik "The hatch is open. Is anyone listening?" From srobertson@kth.se Sat Apr 30 01:02:18 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!kth!srobertson From: srobertson@kth.se (Steve Robertson) Newsgroups: comp.dsp Subject: Re: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Apr30.010218.1467@kth.se> Date: Sat, 30 Apr 1994 01:02:18 GMT References: <1994Apr23.130418.6698@delphi.com> <1994Apr25.043018.1817@cern.ch> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Apr25.043018.1817@cern.ch>, sokonkwo@cern.ch (Steve Okonkwo) writes: > Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! -- === Steve Robertson === Dept of Electrical Engineering, Royal Institute of Technology, Stockholm "Hardware is temporary. The signal survives."