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Busy bursts for trading off throughput and fairness in cellular OFDMA-TDD
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The impact of mobility on OFDMA-based cellular systems with reuse partitioning
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OFDMA-TDD networks with busy burst enabled grid-of-beam selection
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
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Wireless Personal Communications: An International Journal
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Wireless Personal Communications: An International Journal
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Wireless Personal Communications: An International Journal
Wireless Personal Communications: An International Journal
Inter-cell Interference Modeling in LTE Systems
Wireless Personal Communications: An International Journal
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In this paper, we study the performance of frequency allocation schemes in forthcoming OFDMA-based systems. These systems include WiMAX and 3G long term evolution. We first develop an analytical model for the collisions for an arbitrary number of users in the different cells. We then calculate the capacity of the system using a Markov model and taking into account the inter-cell interference and its impact on the adaptive modulation. We apply this model to compare four frequency allocation schemes, namely reuse 1, reuse 3, and static and dynamic mixes of reuse 1 and 3. We also considered a fifth scheme, called partial isolation and proposed for 3G LTE systems, that uses different transmission powers in the different frequency bands, in order to reduce interference at cell edge. Our results show that the partial isolation scheme outperforms all the others, especially in the downlink, as it combines the advantage of the reuse 1 scheme (large overall throughput) with that of the mix of reuses 1 and 3 (good cell-edge performance).