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Báo cáo hóa học: "Research Article Resource Allocation with EGOS Constraint in Multicell OFDMA Communication Systems: Combating Intercell Interference"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Resource Allocation with EGOS Constraint in Multicell OFDMA Communication Systems: Combating Intercell Interference | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2010 Article ID 747102 10 pages doi 10.1155 2010 747102 Research Article Resource Allocation with EGOS Constraint in Multicell OFDMA Communication Systems Combating Intercell Interference Husheng Li Department of Electrical Engineering and Computer Science The University of Tennessee Knoxville TN 37996 USA Correspondence should be addressed to Husheng Li husheng@eecs.utk.edu Received 23 October 2009 Revised 11 March 2010 Accepted 22 June 2010 Academic Editor Guosen Yue Copyright 2010 Husheng Li. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Resource power and bandwidth allocation is an important issue in orthogonal frequency division multiple access OFDMA systems. For multicell systems the interference across different cells makes the optimization of resource allocation difficult. For finite systems a constraint on the rise over thermal ROT is placed to alleviate the intercell interference. A hybrid scheme with equal receive power and peak transmit power is shown to be optimal for the ROT constrained case. Large system analysis is applied for multi-cell OFDMA systems with the fairness constraint of equal grade of service EGOS . An interference function is defined to model the intercell interference. Variational analysis is used to compute the optimal profile of transmit power and bandwidth. The optimal resource allocation is then computed using numerical simulations. 1. Introduction Orthogonal frequency division multiple access OFDMA has become the fundamental signaling technique for uplink 4G wireless communication systems e.g. Worldwide Interoperability for Microwave Access WiMAX although single-carrier frequency division multiple access SC-FDMA is used in uplink Long-Term Evolution LTE systems the .