Spectrum sensing using single-radio switched-beam antenna systems

Elpiniki P. Tsakalaki*, Elisabeth De Carvalho, Constantinos B. Papadias, Tharmalingam Ratnarajah

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The paper describes spectrum sensing using singleradio switched-beam arrays with reactance-loaded parasitic elements. At a given frequency, the antenna's loading conditions (reactive loads) are optimized for maximum average beamforming gain in the beampattern look direction. Circular permutations of the reactive loads rotate the narrowband beampattern to different angular positions dividing the whole space around the cognitive receiver into several angular subspaces. The beampattern directionality leverages the performance of spectrum sensing algorithms like the energy detection by enhancing the receive signal-to-noise ratio. Moreover, the selection combining across the weakly correlated beampatterns gives rise to a diversity action further boosting the probability of detection.

Original languageEnglish
Title of host publicationProceedings of the 2012 7th International ICST Conference on Cognitive Radio Oriented Wireless Networks and Communications, CROWNCOM 2012
Pages118-123
Number of pages6
DOIs
Publication statusPublished - 26 Nov 2012
Event2012 7th International ICST Conference on Cognitive Radio Oriented Wireless Ntworks and Communications, CROWNCOM 2012 - Stockholm, United Kingdom
Duration: 18 Jun 201220 Jun 2012

Conference

Conference2012 7th International ICST Conference on Cognitive Radio Oriented Wireless Ntworks and Communications, CROWNCOM 2012
Country/TerritoryUnited Kingdom
CityStockholm
Period18/06/1220/06/12

Keywords

  • Cognitive radio
  • energy detection
  • parasitic arrays
  • smart-antennas
  • spectrum sensing
  • switched-beam antennas

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