From mbrennan@cern.ch Mon Oct 28 09:18:56 1996 Path: ashpoly!cascade!brgate!saturno!cern!mbrennan From: mbrennan@cern.ch (Mikhail Brennan) Newsgroups: comp.dsp Subject: [FLAME] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Oct28.091856.5073@cern.ch> Date: Mon, 28 Oct 1996 09:18:56 GMT Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: TIN [version 1.2 PL2] 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). Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'. When all 14 rows are assembled, the matrix forms an 80-column ASCII status report. -- Mikhail Brennan US Robotics Courier V.34 @ 28,800 bps "The hatch is open. Is anyone listening?" From bchoi@cam.ac.uk Tue Oct 29 16:29:56 1996 Path: ashpoly!cascade!bigsur!cam!bchoi From: bchoi@cam.ac.uk (Bill Choi) Newsgroups: comp.dsp Subject: Re: [FLAME] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Oct29.162956.4855@cam.ac.uk> Date: Tue, 29 Oct 1996 16:29:56 GMT References: <1996Oct28.091856.5073@cern.ch> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: Netscape 1.1N Lines: 12 In article <1996Oct28.091856.5073@cern.ch>, mbrennan@cern.ch (Mikhail Brennan) writes: > 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 song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. -- === Bill Choi === Dept of Electrical Engineering, University of Cambridge Computer Laboratory "Hardware is temporary. The signal survives." From dtanaka@stanford.edu Thu Oct 31 02:03:56 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!stanford!dtanaka From: dtanaka@stanford.edu (Dong-hyun Tanaka) Newsgroups: comp.dsp Subject: Re: [FLAME] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Oct31.020356.4780@stanford.edu> Date: Thu, 31 Oct 1996 02:03:56 GMT References: <1996Oct28.091856.5073@cern.ch> <1996Oct29.162956.4855@cam.ac.uk> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1996Oct29.162956.4855@cam.ac.uk>, bchoi@cam.ac.uk (Bill Choi) writes: > The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! > Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. -- Dong-hyun Tanaka Practical Peripherals 14.4 @ 33,600 bps "The hatch is open. Is anyone listening?"