Current Search: Advanced Communications Technology Satellite (x)
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Title
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Control system for a QPSK burst modem used for ACTS satellite testing.
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Creator
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Knight, Terence Robert., Florida Atlantic University, Helmken, Henry, College of Engineering and Computer Science, Department of Computer and Electrical Engineering and Computer Science
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Abstract/Description
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A test system was designed to determine the performance a QPSK satellite burst modem when using the Ka band link of the Advanced Communications Technology Satellite. Interface circuitry, largely based on the 22V10 programmable logic device, was designed to allow the modem to be controlled by a personal computer. Communication between the interface and the computer was accomplished through the computer's parallel port. TDMA frame timing was automatically controlled by the interface. A C...
Show moreA test system was designed to determine the performance a QPSK satellite burst modem when using the Ka band link of the Advanced Communications Technology Satellite. Interface circuitry, largely based on the 22V10 programmable logic device, was designed to allow the modem to be controlled by a personal computer. Communication between the interface and the computer was accomplished through the computer's parallel port. TDMA frame timing was automatically controlled by the interface. A C language program provided operator control of the interface itself. Tests using this system showed that a severe night-time fading problem is experienced at the FAU receiver site. Very low error rates were recorded by this system in a loop-back transmission at the NASA satellite control terminal.
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Date Issued
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1995
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PURL
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http://purl.flvc.org/fcla/dt/15139
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Subject Headings
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Advanced Communications Technology Satellite, Artificial satellites in telecommunication, Digital communications
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Format
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Document (PDF)
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Title
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Ka-band radiometry in the Advanced Communications Technology Satellite (ACTS) system.
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Creator
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Bourgeois, Monique Jacqueline., Florida Atlantic University, Helmken, Henry
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Abstract/Description
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The Advanced Communications Technology Satellite propagation experiment was designed by NASA to study the effects of precipitation, primarily rain, on Ka frequency band signals. Two beacon signals, transmitted from the satellite, provide attenuation data that is recorded by a propagation terminal located in Tampa, Florida. The received beacon data contains a DC bias and diurnal effects and is therefore uncalibrated. Radiometers, centered at each beacon carrier frequency, are used to set the 0...
Show moreThe Advanced Communications Technology Satellite propagation experiment was designed by NASA to study the effects of precipitation, primarily rain, on Ka frequency band signals. Two beacon signals, transmitted from the satellite, provide attenuation data that is recorded by a propagation terminal located in Tampa, Florida. The received beacon data contains a DC bias and diurnal effects and is therefore uncalibrated. Radiometers, centered at each beacon carrier frequency, are used to set the 0 dB reference level for the beacon data, using constants determined through radiometer calibration techniques. The details of this process are examined using actual propagation data.
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Date Issued
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1997
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PURL
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http://purl.flvc.org/fcla/dt/15374
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Subject Headings
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Advanced Communications Technology Satellite, Artificial satellites in telecommunication, Radiometers
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Format
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Document (PDF)
