Authors:Maria A. Seimeni, Georgios I. Tsivgoulis, Panagiotis K. Gkonis, Dimitra I. Kaklamani, Iakovos S. Venieris, Christos A. Papavassiliou
Source:FERMAT, Volume 21, Article 2, May-Jun., 2017
Abstract: The paper studies two resource allocation strategies (GRID, anti-EMI) for Multi-User Orthogonal Frequency Division Multiple Access (MU OFDMA) systems. These strategies are evaluated after being compared with the Round Robin and the Fractional Frequency Reuse (FFR) strategy in terms of mean throughput and mean dissipated power for 1, 2 and 5 allocated subcarrier frequencies per mobile terminal (MT) and algorithmic complexity. All investigated strategies assign resources without Channel State Information (no CSI), while both GRID and anti-EMI inherently combat Co-Channel Interference (CCI); hence they enhance mean throughput. Simulations indicate that GRID outperforms Round Robin and FFR in all scenarios into consideration and competes the anti-EMI strategy in various network orientations. The latter is justified especially for highly populated scenarios (i.e. 50% probability failure and 2 subcarriers per MT). As for the FFR strategy, simulations verify that the spectral efficiency is not the optimum in irregular-shaped cell networks, which has been verified in studies on regular-shaped cell networks as well. Finally, the platform can inherently spare around the 70% of the maximum available power.
Index Terms: OFDMA, Resource Allocation Management, FFR, Inter-Cell Interference Cοordination
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On the Performance Evaluation of Two Novel Fractional Frequency Reuse Approaches for OFDMA Multi-User Multi-Cellular Networks