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Sensors 2018, 18(2), 652; https://doi.org/10.3390/s18020652

The Spectrum Analysis Solution (SAS) System: Theoretical Analysis, Hardware Design and Implementation

1
Department of Electrical Engineering, The Pennsylvania State University, University Park, PA 16802, USA
2
RF and Millimeter-Wave Engineering Group, Johns Hopkins University Applied Physics Laboratory, Laurel, MD 20723, USA
3
Sensors and Electronics Directorate, U.S. Army Research Laboratory, Adelphi, MD 20783, USA
*
Author to whom correspondence should be addressed.
Received: 22 December 2017 / Revised: 15 February 2018 / Accepted: 20 February 2018 / Published: 22 February 2018
(This article belongs to the Section Remote Sensors)

Abstract

This paper describes a multichannel super-heterodyne signal analyzer, called the Spectrum Analysis Solution (SAS), which performs multi-purpose spectrum sensing to support spectrally adaptive and cognitive radar applications. The SAS operates from ultrahigh frequency (UHF) to the S-band and features a wideband channel with eight narrowband channels. The wideband channel acts as a monitoring channel that can be used to tune the instantaneous band of the narrowband channels to areas of interest in the spectrum. The data collected from the SAS has been utilized to develop spectrum sensing algorithms for the budding field of spectrum sharing (SS) radar. Bandwidth (BW), average total power, percent occupancy (PO), signal-to-interference-plus-noise ratio (SINR), and power spectral entropy (PSE) have been examined as metrics for the characterization of the spectrum. These metrics are utilized to determine a contiguous optimal sub-band (OSB) for a SS radar transmission in a given spectrum for different modalities. Three OSB algorithms are presented and evaluated: the spectrum sensing multi objective (SS-MO), the spectrum sensing with brute force PSE (SS-BFE), and the spectrum sensing multi-objective with brute force PSE (SS-MO-BFE). View Full-Text
Keywords: cognitive radar; dynamic spectral sharing (DSS); signal analyzer; spectral opportunity; spectral occupancy cognitive radar; dynamic spectral sharing (DSS); signal analyzer; spectral opportunity; spectral occupancy
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Narayanan, R.M.; Pooler, R.K.; Martone, A.F.; Gallagher, K.A.; Sherbondy, K.D. The Spectrum Analysis Solution (SAS) System: Theoretical Analysis, Hardware Design and Implementation. Sensors 2018, 18, 652.

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