Journal of information and communication convergence engineering

The Korea Institute of Information and Commucation Engineering (한국정보통신학회)
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Sensing Optimization for an Receiver Structure in Cognitive Radio Systems

  • Kang, Bub-Joo (Department of Information and Communication Engineering, Dongguk University) ;
  • Nam, Yoon-Seok (Department of Information and Communication Engineering, Dongguk University)
  • Received : 2011.01.07
  • Accepted : 2011.02.07
  • Published : 2011.01.01
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Abstract

This paper describes the optimization of spectrum sensing in terms of the throughput of a cognitive radio (CR) system. Dealing with the optimization problem of spectrum sensing, this paper evaluates the throughput of a CR system by considering such situations as the penalty time of a channel search and incumbent user (IU) detection delay caused by a missed detection of an incumbent signal. Also, this paper suggests a serial channel search scheme as the search method for a vacant channel, and derives its mean channel search time by considering the penalty time due to the false alarm of a vacant channel search. The numerical results suggest the optimum sensing time of the channel search process using the derived mean channel search time of a serial channel search in the case of a sensing hardware structure with single radio frequency (RF) path. It also demonstrates that the average throughput is improved by two separate RF paths in spite of the hardware complexity of an RF receiver.

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References

  1. IEEE 802.22, Functional Requirements for the 802.22 WRAN Standard, IEEE 802.22-05/007r46, September 2005.
  2. IEEE 802.22 WG, Draft standard for wireless regional area networks part 22, IEEE P802.22/ D0.3, May 2007.
  3. A. Ghasemi and E.S. Sousa, "Optimization of spectrum sensing for opportunistic spectrum access in cognitive radio networks," IEEE CCNC, pp.1022-1026, Jan. 2007.
  4. Y.C. Liang, Y. Zeng, E. Peh, et al., "Sensing-throughput tradeoff for cognitive radio networks," IEEE Trans. Wireless Commun. vol. 7, no. 4, pp.1326-1337, April 2008. https://doi.org/10.1109/TWC.2008.060869
  5. G. Chouinard, CPE RF Architecture, IEEE 802.22-07/0081r0, January 2007.
  6. A.J. Viterbi, CDMA Principles of Spread Spectrum Multiple Access Communication, Addison-Wesley, New York, 1995.
  7. H. Urkowitz, "Energy detection of unknown deterministic signals," Proc. IEEE, vol.55, pp.523-531, April 1967. https://doi.org/10.1109/PROC.1967.5573