Downlink Resource Allocation Scheme for OFDMA System
Swapna P S1, Sakuntala S. Pillai2
1Swapna P S, Department of Electronics and Communication Engineering, Mar Baselios College of Engineering and Technology, Kerala University, Trivandrum (Kerala), India.
2Dr. Sakuntala S. Pillai, Department of Electronics and Communication Engineering, Mar Baselios College of Engineering and Technology, Kerala University, Trivandrum (Kerala), India.
Manuscript received on 15 October 2015 | Revised Manuscript received on 25 October 2015 | Manuscript Published on 30 October 2015 | PP: 132-135 | Volume-5 Issue-1, October 2015 | Retrieval Number: A4313105115/15©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: —Orthogonal Frequency Division Multiple Access (OFDMA) is a promising multiple access technique for next generation wireless communication such as WiMAX, LTE, IMT-A etc because of its high spectral efficiency and inherent robustness against frequency selective fading. Inclusion of relays into the system further improves the system performance. The asymmetric radio resource allocation problem for cooperative relay assisted OFDMA wireless networks with the objective of maximizing the data rate is addressed in this paper. In cooperative communication the transmission from base station to mobile stations is assisted by decode-and-forward relays. To reduce the computational complexity of its optimal solution, the proposed scheme is sub-divided into three subsections. The first section is to select the relays and then the subcarrier is allocated to the selected relays. As the next step, power is allocated to each subcarrier. Simulation results shows that the proposed scheme achieves better performance than the existing techniques
Keywords: Hungarian Algorithm, Interference Computation, OFDMA, Resource Allocation, Water Filling Algorithm.
Scope of the Article: Algorithm Engineering