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Collision Avoidance Scheduling for Capacity Improvement of Adaptive OFDMA Systems  

Kim, Young-Ju (Yonsei University)
Song, Hyoung-Joon (Yonsei University)
Kwon, Dong-Young (Yonsei University)
Hong, Dae-Sik (Yonsei University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.45, no.11, 2008 , pp. 9-14 More about this Journal
Abstract
In this paper, we propose a collision avoidance scheduling to increase the multiuser diversity gains in the adaptive orthogonal frequency division multiple access (OFDMA) system. The scheduling policy is based on the minimum collision criterion which investigates the differences of user channels. The paper includes the derivation of capacity expressions for the adaptive OFDMA system with the proposed scheduling. The analysis shows that the capacity of the system depends on the number of collisions between the selected users to be simultaneously served. Numerical results show that the proposed scheduling provides improved capacity performance over existing ones.
Keywords
capacity; OFDMA; adaptive subchannel allocation; collisions; scheduling;
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1 C. Y. Wong, R. S. Cheng, K. B. Letaief, and R. D. Murch, 'Multiuser OFDM with adaptive subcarrier, bit, and power allocation,' IEEE J. Select. Areas Commun., vol. 17, pp. 1747-1758, Oct. 1999   DOI   ScienceOn
2 C. Y. Wong, C.Y. Tsui, R. S. Cheng, and K.B. Letaief, 'A real-time sub-carrier allocation scheme for multiple access downlink OFDM transmission,' in Proc. IEEE Veh. Technol. Conf., vol. 2, pp. 1124-1128, 1999
3 C.-J. Chen, and L.-C. Wang, 'A unified capacity analysis for wireless systems with joint multiuer scheduling and antenna diversity in Nakagami fading channels,' IEEE Trans. Commun., vol. 54, pp. 469-478, Mar. 2006   DOI   ScienceOn
4 J. M. Holtzman, 'Asymptotic analysis of proportional fair algorithm,' in Proc. IEEE Symp. PIMRC, pp. F33-F37, 2001. May 23
5 D. Kivanc, G. Li, and H. Liu, 'Computationally efficient bandwidth allocation and power control for OFDMA,' IEEE Trans. Commun., vol. 2, pp.1150-1158, Nov. 2003   DOI   ScienceOn
6 A. Popoulis, Probability, Random Variables, and Stochastic Processes. McGraw Hill, 1991
7 Jaap van de Beek, 'Channel quality feedback schemes for 3GPP's Evolved-UTRA downlink,' in Proc. IEEE GLOBECOM, pp. 1-5, Nov. 2006
8 J. Jang, and K.B. Lee, 'Transmit power adaptation for multiuser OFDM systems,' IEEE J. Select. Areas Commun., vol. 21, pp. 171-178, Feb. 2003   DOI   ScienceOn
9 E. L. Hahne, and R. G. Gallager, 'Round robin scheduling for fair flow control in data communication networks,' in Proc. IEEE Int. Conf. Commun., pp. 103-107, June 1986