EAN: 9783737607445

SPACE-TIME SPECTRUM SENSING FOR COGNITIVE RADIO...

A cognitive radio (CR) system offers a more efficient spectrum utilization as compared to
conventional wireless transmission systems. In particular  in a so-called interweave CR
scenario  spectrum sensing is a crucial component responsible for acquiring information about
the existence and strength of a primary user (PU) signal  since the subsequent spectral access
depends on that information. A wide range of spectrum sensing techniques has been proposed to
suit various requirements and system scenarios. These techniques differ in many respects like
e. g. the computational complexity  the required observation frame length as well as the
resulting sensing performance. Spectrum sensing in different scenarios and under various models
is investigated in this thesis. Here  both temporal and spatial correlations of the received
signals are considered for designing space-time sensing algorithms.

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