Wideband spectrum sensing order for cognitive radios with sensing errors and channel SNR probing uncertainty

Doha R. Hamza, Sonia Aïssa

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

A secondary user (SU) seeks to transmit by sequentially sensing statistically independent primary user (PU) channels. If a channel is sensed free, it is probed to estimate the signal-to-noise ratio between the SU transmitter-receiver pair over the channel. We jointly optimize the channel sensing time, the sensing decision threshold, the channel probing time, together with the channel sensing order under imperfect synchronization between the PU and the SU. The sensing and probing times and the decision threshold are assumed to be the same for all channels. We maximize a utility function related to the SU throughput under the constraint that the collision probability with the PU is kept below a certain value and taking sensing errors into account. We illustrate the optimal policy and the variation of SU throughput with various system parameters. © 2012 IEEE.
Original languageEnglish (US)
Pages (from-to)151-154
Number of pages4
JournalIEEE Wireless Communications Letters
Volume2
Issue number2
DOIs
StatePublished - Apr 2013

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering
  • Physics and Astronomy (miscellaneous)

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