Journal Papers (appeared/accepted) 1. F. Qu, D. Duan, L. Yang and A. Swami, “Signaling with Imperfect Channel State Information: A Battery Power Efficiency Comparison,” IEEE Trans.on Signal Processing, vol. 56, no. 9, pp. 4486--4495, September 2008. Journal Papers (submitted) 1. D. Duan, F. Qu, L. Yang, A. Swami and J. C. Principe, “Battery Power Efficiency of PPM and OOK in Wireless Sensor Networks,” IEEE Trans.on Communications, Submitted August 2008. 2. D. Duan, L. Yang and J. C. Principe, “Cooperative Diversity of Spectrum Sensing in Cognitive Radio Networks,” IEEE Trans.on Communications, Submitted October 2008. Conference Papers 1. D. Duan, F. Qu, L. Yang, A. Swami and J. C. Principe, “Modulation Selection from a Battery Power Efficiency Perspective: A Case Study of PPM and OOK,” in Proceedings of IEEE Wireless Communications & Networking Conference, Budapest, Hungary, April 5-8, 2009. (submitted) 2. D. Duan, L. Yang and J. C. Principe, “Cooperative Diversity of Spectrum Sensing in Cognitive Radio Networks,” in Proceedings of IEEE Wireless Communications & Networking Conference, Budapest, Hungary, April 5-8, 2009. (submitted) 3. F. Qu, D. Duan, L. Yang and A. Swami, “Signaling with Imperfect Channel State Information: A Battery Power Efficiency Comparison,” in Proceedings of IEEE Military Communication Conference, Orlando, FL, October 29-31, 2007. 4. D. Duan, W. Liu, P. Chen, M. Rao and J. C. Principe, "Variance and Bias Analysis of Information Potential and Symmetric Information Potential," IEEE Int. Workshop on Machine Learning for Signal Processing, Thessaloniki, Greece, August 27-29, 2007.