04 04 2006 Ellina Foutekova
Effect of UL/DL Asymmetry and LOS on TDD-OFDMA Cellular Networks
An efficient utilization of radio resources is of paramount importance for wireless networks offering multimedia services, as they require optimum throughput performance. In this study, two link adaptation algorithms are modified for Time Division Duplexing-based Orthogonal Frequency Division Multiple Access (TDD-OFDMA) system design and their performance is studied in terms of uplink-downlink asymmetry and line-of-sight (LOS) conditions among base stations. The results show that a downlink-favored asymmetry together with TDD can achieve close to maximum spectral efficiencies. This makes TDD-OFDMA a promising multiplexing technique for future data-centric cellular networks.