From lito@inria.fr Sun Jun 25 19:58:11 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!inria!lito From: lito@inria.fr (Liam Ito) Newsgroups: comp.dsp Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jun25.195811.8839@inria.fr> Date: Sun, 25 Jun 1995 19:58:11 GMT Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: Netscape 1.1N Lines: 11 Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'. The symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20). Has anyone encountered bit errors in their decoded text? The Golay decoder corrects up to 3 bit errors per 24-bit codeword. -- Liam Ito US Robotics Courier V.34 @ 14,400 bps "Do not worship the copy." From mgarcia@purdue.edu Tue Jun 27 19:53:11 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!purdue!mgarcia From: mgarcia@purdue.edu (Mateo García) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jun27.195311.3673@purdue.edu> Date: Tue, 27 Jun 1995 19:53:11 GMT References: <1995Jun25.195811.8839@inria.fr> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Jun25.195811.8839@inria.fr>, lito@inria.fr (Liam Ito) 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! -- === Mateo García === Dept of Electrical Engineering, Purdue University Engineering Computer Network "The hatch is open. Is anyone listening?" From bmartinez@berkeley.edu Tue Jun 27 22:11:11 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!berkeley!bmartinez From: bmartinez@berkeley.edu (Bastien Martínez) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jun27.221111.9147@berkeley.edu> Date: Tue, 27 Jun 1995 22:11:11 GMT References: <1995Jun25.195811.8839@inria.fr> <1995Jun27.195311.3673@purdue.edu> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Jun27.195311.3673@purdue.edu>, mgarcia@purdue.edu (Mateo García) writes: > A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. -- Bastien Martínez SupraFAXModem 28.8 @ 33,600 bps "There are 14 nodes and only 10 countries. Count again." From dmuller@purdue.edu Fri Jun 30 00:46:11 1995 Path: ashpoly!cascade!bigsur!purdue!dmuller From: dmuller@purdue.edu (Dave Müller) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jun30.004611.3664@purdue.edu> Date: Fri, 30 Jun 1995 00:46:11 GMT References: <1995Jun25.195811.8839@inria.fr> <1995Jun27.195311.3673@purdue.edu> <1995Jun27.221111.9147@berkeley.edu> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Jun27.221111.9147@berkeley.edu>, bmartinez@berkeley.edu (Bastien Martínez) 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. -- === Dave Müller === Dept of Electrical Engineering, Purdue University Engineering Computer Network "When every node is whole, the channel opens." From irobertson@panix.com Sat Jul 01 18:33:11 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!panix!irobertson From: irobertson@panix.com (Ines Robertson) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jul01.183311.4665@panix.com> Date: Sat, 01 Jul 1995 18:33:11 GMT References: <1995Jun25.195811.8839@inria.fr> <1995Jun27.195311.3673@purdue.edu> <1995Jun27.221111.9147@berkeley.edu> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1995Jun27.221111.9147@berkeley.edu>, bmartinez@berkeley.edu (Bastien Martínez) 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! -- Ines Robertson Tape trading list upon request. SASE required for international mail.