Effect of I/Q imbalance on blind spectrum sensing for OFDMA overlay cognitive radio

Omid Semiari, Behrouz Maham, Chau Yuen

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

14 Citations (Scopus)

Abstract

Direct-conversion transceivers are in demand, due to their low cost implementation of analog front-ends. However, these transmitters or receivers introduce imperfections such as in-phase and quadrature-phase (I/Q) imbalances. These impairments can severely degrade the performance of cognitive radio devices that are based on orthogonal frequency division multiplexing (OFDM) multiple access schemes. In this paper, a cognitive radio system with an OFDMA primary system is considered. A new three-level hypothesis blind detector for spectrum sensing is introduced and the effect of I/Q imbalance on this detection scenario is studied. Finally, we show that the proposed detector is much less vulnerable to I/Q imbalance than conventional two-level detectors.

Original languageEnglish
Title of host publication2012 1st IEEE International Conference on Communications in China, ICCC 2012
Pages433-437
Number of pages5
DOIs
Publication statusPublished - Dec 28 2012
Event2012 1st IEEE International Conference on Communications in China, ICCC 2012 - Beijing, China
Duration: Aug 15 2012Aug 17 2012

Publication series

Name2012 1st IEEE International Conference on Communications in China, ICCC 2012

Other

Other2012 1st IEEE International Conference on Communications in China, ICCC 2012
CountryChina
CityBeijing
Period8/15/128/17/12

Keywords

  • Cognitive radio
  • I/Q imbalance
  • OFDMA
  • blind detection
  • fading channels

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Communication

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