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Low Complexity Subcarrier Allocation Scheme for OFDMA Systems  

Woo, Choong-Chae (한서대학교)
Wang, Han-Ho (상명대학교)
Publication Information
Journal of the Institute of Convergence Signal Processing / v.13, no.2, 2012 , pp. 99-105 More about this Journal
Abstract
The focus of this paper is a proposal for a computationally efficient dynamic subcarrier allocation (DSA) algorithm for orthogonal frequency-division multiple access (OFDMA) systems. The proposed DSA algorithm considerably reduces the computational complexity and the amount of channel quality information (CQI) compared to amplitude craving greedy (ACG) algorithms, which use full CQI. At the same time, the performance of the proposed algorithm closely appear to ACG algorithms. Moreover, the authors present a new bandwidth-assignment algorithm produced by modifying bandwidth assignment based on the signal-to-noise ratio (BABS). This modified BABS algorithm enables the proposed DSA algorithm to produce a strong outage performance gain over the conventional scheme.
Keywords
OFDMA; DSA; CQI; ACG; DFRS; MBABS;
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