Enhanced spectrum sensing scheme in cognitive radio systems with MIMO antennae

Woongsup Lee, Dong Ho Cho

Research output: Contribution to journalArticlepeer-review


Cognitive radio (CR) is a promising technology for overcoming the lack of available communication bands. In CR technology, spectrum sensing is an important issue, which has recently been extensively studied. We provide a solution to the spectrum-sensing problem for multiple cognitive terminals (CTs) that takes into account the difference among CTs with respect to the probabilities of a false detection and a missed detection. We optimize the spectrum-sensing performance by differentiating the number of spectrum-sensing operations that each CT performs. This has not previously been proposed in the literature. Moreover, we use a simultaneous spectrum-sensing and data transmission scheme that utilizes multiple-input-multiple-output (MIMO) antenna technology. As a result, the degradation of quality of service (QoS) that is caused by spectrum sensing can be reduced, and the throughput of CR systems can be increased, while maintaining the accuracy of spectrum sensing. Through performance analysis, we show that our proposed scheme can achieve the desired levels of performance with respect to the probabilities of a false detection and a missed detection and improve the performance of the CR systems with respect to throughput and delay.

Original languageEnglish
Article number5710993
Pages (from-to)1072-1085
Number of pages14
JournalIEEE Transactions on Vehicular Technology
Issue number3
Publication statusPublished - 2011 Mar

Bibliographical note

Funding Information:
Manuscript received April 3, 2010; revised October 14, 2010; accepted January 4, 2011. Date of publication February 10, 2011; date of current version March 21, 2011. This work was supported by the IT R&D program of MKE/ KEIT under Grant KI001835, Fifth Generation mobile communication systems based on beam division multiple access and relays with group cooperation. This paper was presented in part at CROWNCOM 2008. The review of this paper was coordinated by Dr. S. Wei.

All Science Journal Classification (ASJC) codes

  • Automotive Engineering
  • Aerospace Engineering
  • Electrical and Electronic Engineering
  • Applied Mathematics


Dive into the research topics of 'Enhanced spectrum sensing scheme in cognitive radio systems with MIMO antennae'. Together they form a unique fingerprint.

Cite this