Abstract
Cognitive radios are a natural evolution of Software Defined Radios (SDRs) that are supposed to be equipped with the ability to learn their RF environment and reconfigurability. A cognitive radio can communicate over a primary user’s channel as long as the introduced interference does not degrade the primary Signal-to-Interference-plus-Noise-Ratio (SINR) below its minimum Quality of Service (QoS) requirement. In this paper, we employ cooperation in data transmission in order to increase the secondary transmit power limit. We present an optimal power allocation scheme for secondary users in order to achieve maximum SINR. We show that the optimal channel assignment problem that maximizes the sum-rate can be solved via the so-called Hungarian algorithm at a cubic complexity order. Also, we develop a suboptimal algorithm that permits to solve the channel assignment problem with a quadratic complexity order and with a slight performance degradation compared to that of the optimal solution.
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References
Zhang, Y., Leung, C.: Resource Allocation in an OFDM-based Cognitive Radio System. IEEE Transactions on Communications 57(7), 1928–1931 (2009)
Devroye, N., Vu, M., Tarokh, V.: Cognitive Radio Networks. IEEE Signal Processing Magazine, 12–22 (November 2008)
Zhang, W., Letaief, K.B.: Cooperative Communications for Cognitive Radio Networks. Proceedings of the IEEE 97(5), 878–893 (2009)
Sendonaris, A., Erkip, E., Aazhang, B.: User Cooperation Diversity: Part I. System Description. IEEE Transactions on Communications 51(11), 1927–1938 (2003)
Sendonaris, A., Erkip, E., Aazhang, B.: User Cooperation Diversity: Part II. Implementation Aspects and Performance Analysis. IEEE Transactions on Communications 51(11), 1939–1948 (2003)
Zheng, Y., Xie, X., Yang, L.: Cooperative Spectrum Sensing based on Blind Source Separation for Cognitive Radio. In: 1st International Conference on Future Information Networks 2009, Beijing, China, pp. 398–402 (October 2009)
Liu, Y., Yuan, D., Jiang, M., Yu, H., Xu, C., Zhao, P.: Cooperative Spectrum Sensing in Cognitive Networks. In: IEEE Region 10 Conference TENCON 2008, Hyderabad, India, pp. 1–6 (November 2008)
Matsui, M., Shiba, H., Akabane, K., Uehara, K.: A Cooperative Sensing Technique with Weighting based on distance between radio stations. In: 14th Asia-Pacific Conference on Communications 2008, Tokyo, Japan, pp. 1–4 (October 2008)
Simeone, O., Gambini, J., Bar-Ness, Y., Spagnolini, U.: Cooperation and Cognitive Radio. In: IEEE International Conference on Communications 2007, Glasgow, United Kingdom, pp. 6511–6515 (June 2007)
Devroye, N., Mitran, P., Tarokh, V.: Achievable Rates in Cognitive Radio Channels. IEEE Transactions on Information Theory 52(5), 1813–1827 (2006)
Papadimitriou, C.H., Steiglitz, K.: Combinatorial Optimization: Algorithms and Complexity, pp. 247–248. Dover Publications, Mineola (1998)
Kuhn, H.: The Hungarian Method for the Assignment Problem. Naval Research Logistics Quarterly 2, 83–97 (1955)
Choi, Y.-J., Kim, J., Bahk, S.: Downlink Scheduling with Fairness and Optimal Antenna Assignment for MIMO Cellular Systems. In: IEEE Global Telecommunications Conference 2004, Dallas, TX, pp. 3165–3169 (November -December 2004)
Hungarian Algorithm, http://www.mathworks.com/matlabcentral/leexchange/11609-hungarian-algorithm
Chang, Y.-J., Tao, Z., Zhang, J., Kuo, C.-C.: A Graph-Based Approach to Multi-Cell OFDMA Downlink Resource Allocation. In: IEEE Global Telecommunications Conference 2008, New Orleans, LO, pp. 1–6 (December 2008)
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Bkassiny, M., Jayaweera, S.K. (2010). Optimal Channel and Power Allocation for Secondary Users in Cooperative Cognitive Radio Networks. In: Chatzimisios, P., Verikoukis, C., Santamaría, I., Laddomada, M., Hoffmann, O. (eds) Mobile Lightweight Wireless Systems. Mobilight 2010. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, vol 45. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-16644-0_17
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DOI: https://doi.org/10.1007/978-3-642-16644-0_17
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