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FFT methods in signal processing of the coal interface detector radarThe FM radar for the coal interface detector, operating in the frequency band 2 to 4 GHz, is intended for the display of thicknesses between 2 cm and 20 cm. Because of such a short range, the thickness information is contained in the very few lowest spectral components of the output signal. To overcome this inconvenience, the Fourier series of the output signal was augmented to approximate a Fourier integral. This modification in the signal processing resulted in a higher spectral density, which in turn enabled an easier identification of the interface position in the laboratory. The orientation and spacing of the receiving and transmitting antennas is found to have an important influence on the system performance.
Document ID
19810003497
Acquisition Source
Legacy CDMS
Document Type
Other
Authors
Kajfez, D.
(Mississippi Univ. University, MS, United States)
Date Acquired
August 11, 2013
Publication Date
October 1, 1980
Publication Information
Publication: Alabama Univ. Res. Rept.: The 1980 NASA(ASEE Summer Fac. Fellowship Program
Subject Category
Communications And Radar
Accession Number
81N12005
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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