RESEARCH INTERESTS

Cognitive Radio

Cooperative Communications

Cross-Layer Optimization

EDUCATION

Aug. 2007 – Dec. 2011 Ph.D., Electrical Engineering, Georgia Institute of Technology, Atlanta, GA

Sept. 2005 – June 2007 M.Sc., Information & Communication Engineering, Zhejiang University (ZJU), Hangzhou, China

Sept. 2001 – July 2005 B.Sc., Communication Engineering, Nanjing University of Science & Technology (NUST), Nanjing, China

RESEARCH EXPERIENCE

Aug. 2007 – Aug. 2011 Graduate Research Assistant, Georgia Institute of Technology, Atlanta, GA

Advisor: Prof. Geoffrey Ye Li, IEEE Fellow

· Cooperative spectrum sensing and detection

· Scheduling of spectrum sensing and access

· Spectral shaping and precoding for OFDM-based cognitive radio transceiver

· Resource allocation in heterogeneous wireless networks

Mar. 2005 – June 2007 Research Assistant, Zhejiang University, Hangzhou, China

Advisor: Prof. Zhaoyang Zhang

· Interference avoidance in OFDM-based cognitive radio systems

· Synchronization & channel estimation for mobile OFDM

TEACHING EXPERIENCE

Aug. 2010 – May 2011 Graduate Teaching Assistant, Georgia Institute of Technology, Atlanta, GA

· ECE 2040 - Circuit Analysis

· ECE Tutorial Lab

WORK EXPERIENCE

May 2009 – Aug. 2009 Research Intern, Wireless Advanced Research, Huawei Technologies, Plano, TX

· Use case design for relaying in 3GPP LTE-Advanced

· Protocol and algorithm design for cognitive radio in wireless cellular networks

May 2008 – Aug. 2008 Research Intern, Wireless Advanced Research, Huawei Technologies, Plano, TX

· Link simulation for IEEE 802.16e OFDMA PHY with STC/MIMO and HARQ

· Algorithm design for cognitive radio

SKILLS

Theoretical: Digital Communications, Statistical Signal Processing, Probability & Stochastic Processes

Programming: MATLAB, C, C++, DSP Assembly, VHDL, Verilog

HONORS AND AWARDS

Excellent Graduate, ZJU, 2007

Excellent Graduate Student Leader, ZJU, 2006

Excellent Graduate & Outstanding Undergraduate Thesis, NUST, 2005

Outstanding Student, Education Department of Jiangsu Province, Ministry of Education of China, 2004

3rd Prize in National Undergraduate Electronic Design Contest, 2004

1st prize in NUST Physics Contest, 2003

2nd prize in Jiangsu, National Mathematical Contest in Modeling, 2003

Scholarship every year, NUST (ranked 1st out of 508 students), 2001-2005

PROFESSIONAL ACTIVITIES

Student Member of IEEE and IEEE Communications Society

Reviewer for IEEE Proceedings, IEEE Communications Magazine, IEEE Transactions on Signal Processing, IEEE Transactions on Communications, IEEE Transactions on Wireless Communications, IEEE Transactions on Vehicular Technology, IEEE Journal of Selected Topics in Signal Processing, IEEE Journal on Selected Areas in Communications, IEEE/ACM Transactions on Networking, IEEE Signal Processing Letters, EURASIP Journal on Advances in Signal Processing, EURASIP Journal on Wireless Communications and Networking, Wiley Wireless Communications and Mobile Computing, International Journal of Communication Systems, IET Communications, Computer Communications (Elsevier), Ad Hoc Networks (Elsevier), IEEE International Conference on Communications (ICC), IEEE Global Communications Conference (GLOBECOM), IEEE Wireless Communications and Networking Conference (WCNC), IEEE Vehicular Technology Conference (VTC), IEEE Personal, Indoor and Mobile Radio Communications Symposium (PIMRC), IEEE Military Communications Conference (MILCOM), IEEE Consumer Communications and Networking Conference (CCNC), IEEE International Wireless Communications and Mobile Computing Conference (IWCMC), IEEE International Workshop on Signal Processing Advances in Wireless Communications (SPAWC), IEEE INFOCOM Workshop on Cognitive Wireless Communications and Networking, etc.

Technical Program Committee (TPC) member for the 2012 International Conference on Communications, Mobility, and Computing (CMC 2012)

PUBLICATIONS

Journal Papers

· L. Lu, X. Zhou, U. Onunkwo, and G. Y. Li, “Ten years of research in spectrum sensing and sharing in cognitive Radio,” to appear in EURASIP Journal on Wireless Communications and Networking.

· L. Li, X. Zhou, H. Xu, G. Y. Li, D. Wang, and A. C. K. Soong, “Energy-efficient transmission for protection of incumbent users,” IEEE Trans. Broadcast., vol. 57, no. 3, pp. 718-720, Sept. 2011.

· L. Li, X. Zhou, H. Xu, G. Y. Li, D. Wang, and A. C. K. Soong, “Simplified relay selection and power allocation in cooperative cognitive radio system,” IEEE Trans. Wireless Commun., vol. 10, pp. 33-36, Jan. 2011.

· X. Zhou, G. Y. Li, D. Li, D. Wang, and A. C. K. Soong, “Probabilistic resource allocation for opportunistic spectrum access,” IEEE Trans. Wireless Commun., vol. 9, no. 9, pp. 2870-2879, Sept. 2010.

· J. Ma, X. Zhou, and G. Y. Li, “Probability-based periodic spectrum sensing during secondary communication,” IEEE Trans. Commun., vol. 58, no. 4, pp. 1291-1301, Apr. 2010.

· X. Zhou, J. Ma, G. Y. Li, Y. H. Kwon, and A. C. K. Soong, “Probability-based combination for cooperative spectrum sensing,” IEEE Trans. Commun., vol. 58, no. 2, pp. 463-466, Feb. 2010.

· X. Zhou, J. Ma, G. Y. Li, Y. H. Kwon, and A. C. K. Soong, “Probability-based optimization of inter-sensing duration and power control in cognitive radio,” IEEE Trans. Wireless Commun., vol. 8, no. 10, pp. 4922-4927, Oct. 2009.

· Z. Zhang, P. Cheng, X. Zhou, and P. Qiu, “System synchronization and channel estimation analysis for IEEE 802.16e OFDMA downlink system,” Int. J. Commun. Syst., vol. 22, no. 4, pp. 375-398, Apr. 2009.

· X. Zhou, G. Y. Li, and G. Sun, “Multiuser spectral precoding for OFDM-based cognitive radio systems,” submitted.

· X. Zhou, G. Y. Li, and G. Sun, “Low-complexity spectral precoding for OFDM-based cognitive radio systems,” in preparation.

· F. Liu, X. Zhou, N. Himayat, S.-P. Yeh, S. Srikanteswara, S. Talwar, C. Feng, and G. Y. Li, “Exploiting statistical interference models for distributed resource allocation in cognitive femtocell,” in preparation.

Book Chapter

· X. Zhou, G. Y. Li, D. Li, D. Wang, and A. C. K. Soong, “Bandwidth-efficient cooperative spectrum sensing,” in Cognitive Radio for Wireless Cellular and Vehicular Networks, H. Venkataraman and G.-M. Muntean, Eds. Boston, MA: Springer, to be published.

Conference Papers

· L. Lu, X. Zhou, and G. Y. Li, “Optimal Sequential Detection in Cognitive Radio Networks,” to appear in Proc. IEEE Wireless Commun. and Networking Conf. (WCNC), Apr. 2012.

· X. Zhou, G. Y. Li, and G. Sun, “Multiuser spectral precoding for OFDM-based cognitive radios,” in Proc. IEEE Global Commun. Conf. (GLOBECOM), Dec. 2011.

· X. Zhou, G. Y. Li, and G. Sun, “Low-complexity spectrum shaping for OFDM-based cognitive radios,” in Proc. IEEE Wireless Commun. and Networking Conf. (WCNC), Mar. 2011.

· X. Zhou, G. Y. Li, D. Li, D. Wang, and A. C. K. Soong, “Bandwidth efficient combination for cooperative spectrum sensing in cognitive radio networks,” in Proc. IEEE Int. Conf. Acoust., Speech, and Signal Process. (ICASSP), Mar. 2010.

· L. Li, X. Zhou, H. Xu, G. Y. Li, D. Wang, and A. C. K. Soong, “Energy-efficient transmission in cognitive radio networks,” in Proc. IEEE Consumer Commun. and Networking Conf. (CCNC), Jan. 2010.

· X. Zhou, G. Y. Li, D. Li, D. Wang, and A. C. K. Soong, “Probability-based resource allocation in cognitive radio networks,” in Proc. IEEE Global Commun. Conf. (GLOBECOM), Nov. 2009.

· X. Zhou, J. Ma, G. Y. Li, Y. H. Kwon, and A. C. K. Soong, “Probability-based combination for cooperative spectrum sensing in cognitive radio networks,” in Proc. IEEE Int. Conf. Commun. (ICC), June 2009.

· X. Zhou, Y. (G.) Li, Y. H. Kwon, and A. C. K. Soong, “Detection timing and channel selection for periodic spectrum sensing in cognitive radio,” in Proc. IEEE Global Commun. Conf. (GLOBECOM), Nov. 2008.

· X. Zhou, Y. (G.) Li, Y. H. Kwon, A. C. K. Soong, and G. Zhao, “Probability-based transmit power control for dynamic spectrum access,” in Proc. IEEE Symp. New Frontiers Dynamic Spectrum Access Networks (DySPAN), Oct. 2008.

· P. Cheng, Z. Zhang, X. Zhou, J. Li, and P. Qiu, “A study on cell search algorithms for IEEE 802.16e OFDMA systems,” in Proc. IEEE Wireless Commun. and Networking Conf. (WCNC), Mar. 2007.

· Y. Zhou, Z. Zhang, and X. Zhou, “OFDMA initial ranging for IEEE 802.16e based on time-domain and frequency-domain approaches,” in Proc. IEEE Int. Conf. Commun. Technology (ICCT), Nov. 2006.

· X. Zhou, Z. Zhang, and P. Cheng, “An Interference Avoidance scheme for OFDM cognitive radio systems,” in Proc. IEEE Int. Conf. Commun. Technology (ICCT), Nov. 2006.

· X. Zhou, Z. Zhang, and P. Cheng, “A Practical Cluster-based channel estimation method for IEEE 802.16e,” in Proc. IEEE Int. Conf. Signal Process. (ICSP), Nov. 2006.

PATENTS

· X. Zhou, Y. H. Kwon, and A. C. K. Soong, “System and Method for Unsynchronized Cooperative Spectrum Sensing in Cognitive Radio Nodes,” U.S. Patent 20100062718, Mar. 11, 2010.

· X. Zhou, Y. H. Kwon, and A. C. K. Soong, “System and Method for Scheduling of Spectrum Sensing in Cognitive Radio Systems,” U.S. Patent 20100003922, Jan. 7, 2010.

· X. Zhou, Y. H. Kwon, and A. C. K. Soong, “System and Method for Secondary Communications with Directional Transmission,” U.S. Patent 20090325482, Dec. 31, 2009.

· X. Zhou, Y. H. Kwon, and A. C. K. Soong, “Transmit Power Control for Dynamic Spectrum Access,” U.S. Patent 20090305639, Dec. 10, 2009.

· Z. Zhang, H. Huang, X. Zhou, P. Cheng, J. Wang, and G. Ni, “Combined frequency offset tracking and channel equalization method and realization system,” China Patent 1968242, May 23, 2007.