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System Design for Cognitive Radio Communications

Summary: System Design for Cognitive Radio
Mustafa E. S¸ahin and H¨useyin Arslan
Electrical Engineering Department, University of South Florida
4202 E. Fowler Avenue, ENB-118, Tampa, FL, 33620
E-mail: {mesahin, arslan}@eng.usf.edu
Abstract-- The rising number and capacity requirements of
radio systems bring about an increasing demand for frequency
spectrum. Cognitive radio offers a tempting solution to this
problem by proposing opportunistic usage of frequency bands
that are not occupied by their licensed users. Since it is a
rather new concept, there is no consensus on the practical im-
plementation of cognitive radio communications. In this paper, a
comprehensive system design for cognitive radio is presented. The
details of spectrum sensing and dynamic spectrum shaping, which
constitute the basics of opportunistic spectrum usage, are given. It
is proposed to transmit the spectrum sensing related information
via on-off keying (OOK) modulated ultrawideband (UWB). The
limits on the range of one-to-one cognitive communications are
discussed. A processing gain based approach that leads to an


Source: Arslan, Hüseyin - Department of Electrical Engineering, University of South Florida


Collections: Engineering