Copyright © 2008 The Institute of Electronics, Information and Communication Engineers
Special Section on Cognitive Radio and Spectrum Sharing Technology -- Papers -- Spectrum Sensing |
Outage Performance of Cognitive Radio with Multiple Receive Antennas*
1 The authors are with UWB-ITRC, Graduate School of Information Technology and Telecommunications, Inha University, #253 Yonghyun-dong, Nam-gu, Incheon, 402-751, Korea. E-mail: qhyang{at}inha.ac.kr
Outage performance of cognitive radios is analyzed in this paper. The scenario under consideration requires the cognitive radio to sense whether the primary user (PU) link is free (i.e. a spectrum hole exists) before making an active transmission using that link. Multiple antennas are available at the cognitive radio link to provide array gains at the sensing stage. We derive a closed-form expression of the outage probability for cognitive transmission by classifying it into several cases. A sensing threshold is deduced according to the PU arrival model illustrated in this paper. Simulation results verify our analysis.
Key Words: outage probability, cognitive radio, spectrum detection, multi-antenna
Manuscript received May 8, 2007. Manuscript revised July 20, 2007.
* This research was supported by the MIC, Korea, under the ITRC support program supervised by the IITA.
Reference
[1] J. Mitola, III, Cognitive radio: An integrated agent architecture for software defined radio, Ph.D. Thesis, Royal Institue of Technology, Sweden, May 2000. [2] S. Haykin, "Cognitive radio: Brain-empowered wireless communications," IEEE J. Sel. Areas Commun., vol.23, no.2, pp.201–220, Feb. 2005. [3] A. Sahai, N. Hoven, and R. Tandra, "Some fundamental limits on cognitive radio," Allerton Conference on Communications, Control, and Computing, pp.131–136, 2004. [4] F.F. Digham, M.S. Alouini, and M.K. Simon, "On the energy detection of unknown signals over fading channels," IEEE Interference on Communications, ICC'03, pp.3575–3579, May 2003. [5] H. Tang, "Some physical layer issues of wide-band cognitive radio systems," First IEEE International Symposium on New Frontiers in Dynamic Spectrum Access Networks, DySPAN 2005, pp.151–159, Nov. 2005. [6] J. Hillenbrand, T.A. Weiss, and F.K. Jondral, "Calculation of detection and false alarm probabilities in spectrum pooling systems," IEEE Commun. Lett., vol.9, no.4, pp.349–351, April 2005. [7] G. Wang, D. Yue, and B. Feng, "Outage probability analysis of MRC with unequal power Nakagami-M co-channel interference and AWGN," First International Conference on Communications and Networking in China, 2006, ChinaCom'06, pp.25–27 Oct. 2006. [8] J.P. Pena-Martin and J.M. Romero-Jerez, "Outage probability with maximal ratio combining in the presence of multiple interferers under Rayleigh and Nakagami fading channels," 15th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, 2004, PIMRC 2004, vol.2, pp.940–944, Sept. 2004. [9] M. Kang, L. Yang, and M.S. Alouini, "Outage probability of MIMO optimum combining in presence of unbalanced co-channel interferers and noise," IEEE Trans. Wirel. Commun., vol.5, no.7, pp.1661–1668, July 2006. [10] A. Sayeed and V. Raghavan, "On the impact of reconfigurable antenna arrays in cognitive radio," ICASSP 2007. [11] M.P. Wylie-Green, "Dynamic spectrum sensing by multiband OFDM radio for interference mitigation," First IEEE International Symposium on New Frontiers in Dynamic Spectrum Access Networks, 2005, DySPAN 2005, pp.619–625, Nov. 2005. [12] A. Batra, S. Lingam, and J. Balakrishnan "Multi-band OFDM: A cognitive radio for UWB," 2006 IEEE International Symposium on Circuits and Systems, 2006, ISCAS2006, pp.4094–4097, May 2006. [13] Q. Zhao, L. Tong, and A. Swami, "Decentralized cognitive mac for dynamic spectrum access," First IEEE International Symposium on New Frontiers in Dynamic Spectrum Access Networks, 2005, DySPAN 2005, pp.224–232, Nov. 2005. [14] L. Yang and J. Qin, "Outage performance of MIMO MRC systems with unequal-power co-channel interference," IEEE Commun. Lett., vol.10, no.4, pp.245–247, April 2006. [15] I.S. Cradshteyn and I.M. Ryzhik, Table of Integrals, Series, and Products, Academic Press, 1980. [16] P. Pawelczak, R.V. Prasad, and R. Hekmat, "Opportunistic spectrum multichannel OFDMA," Proc. 47th IEEE International Conference on Communications (IEEE ICC 2007), pp.5439–5444, June 2007. [17] W.C. Jakes, Microwave Mobile Communications, IEEE Press, Piscataway, NJ, 1993.
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