1.    Akyildiz I F, Lee W Y, Vuran M C, et al. A Survey on spectrum management in cognitive radio networks. IEEE Communications Magazine, 2008, 46(4): 40-48

  2.    Mishra S M, Sahai A, Brodersen R. W. Cooperative sensing among cognitive radios. Proceedings of IEEE International Conference on Communications (ICC’06): Vol 4, Jun 11-15, 2006, Istanbul, Turkey. Piscataway, NJ, USA: IEEE, 2006: 1658-1663

  3.    Ghasemi A, Sousa E S. Collaborative spectrum sensing for opportunistic access in fading environments. Proceedings of the 1st IEEE International Symposium on New Frontiers in Dynamic Spectrum Access Networks (DySPAN’05), Nov 8-11, 2005, Baltimore, MD, USA. Piscataway, NJ, USA: IEEE, 2005: 131-136

  4.    Zhang W, Mallik R K, Letaief K B. Cooperative spectrum sensing optimization in cognitive radio networks. Proceedings of IEEE International Conference on Communications (ICC’08), May 19-23, 2008, Beijing, China. Piscataway, NJ, USA: IEEE, 2008: 3411-3415

  5.    Peng Q H, Zeng K, Wang J, et al. A distributed spectrum sensing scheme based on credibility and evidence theory in cognitive radio context. Proceedings of the 17th Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC’06), Sep 11-14, 2006, Helsinki, Finland. Piscataway, NJ, USA: IEEE, 2006: 2511-2515

  6.    Yang W D, Cai Y M, Xu Y Y. A fuzzy collaborative spectrum sensing scheme in cognitive radio. Proceedings of IEEE 2007 International Symposium on Intelligent Signal Processing and communication systems (ISPACS’07), Nov 28-Dec 1, 2007, Xiamen, China. Piscataway, NJ, USA: IEEE, 2007: 566-569

  7.    Chen R L, Park J M, Bian K. Robust distributed spectrum sensing in cognitive radio networks. Proceedings of the 27th IEEE Conference on Computer Communications (INFOCOM’08), Apr 13-18, 2008, Phoenix, AZ, USA. Piscataway, NJ, USA: IEEE, 2008: 1876-1884

  8.    Visser F E, Janssen G J M , Pawelczak P. Multinode spectrum sensing based on energy detection for dynamic spectrum access. Proceedings of the 67th Vehicular Technology Conference (VTC-Spring’08), May 11-14, 2008, Singapore. Piscataway, NJ, USA IEEE, 2008: 1394-1398

  9.    Cabric D, Mishra S M, Willkomm D, et al. A cognitive radio approach for usage of virtual unlicensed spectrum. Proceeding of the 14th IST Mobile and Wireless Communications Summit (IST Summit’05), Jun 19-22, 2005. Dresden, Germany. 2005: 4p

10.    Sahai A, Hoven N, Tandra R. Some fundamental limits on cognitive radio. Proceedings of the 42nd Annual Allerton Conference on Communications, Control, and Computing, Sep 29-Oct 1, 2004, Monticello IL, USA. Boston, MA, USA: Kluwer Academic Publisher, 2004: 1662-1671

11.    Digham F F, Alouini M S, Simon M K. On the energy detection of unknown signals over fading channels. IEEE Transactions on Communications, 2007, 55(1): 21-24

12.    Chen Y F. Optimum number of secondary users in collaborative spectrum sensing considering resources usage efficiency. IEEE Communications Letters, 2008, 12(12): 877-879

13.    Peh E, Liang Y C. Optimization for cooperative sensing in cognitive radio networks. Proceedings of IEEE Wireless Communications and Networking Conference (WCNC’07), Mar 11-15, 2007, Hong Kong, China. Piscataway, NJ, USA: IEEE, 2007: 27-32