| One of the main objectives of the next generation of mobile communications is to provide cost-effective transmission of broadband multimedia services over time-varying, frequency-selective fading, band-limited wireless channels. Orthogonal Frequency Division Multiplexing (OFDM) with dynamic resource allocation is one of the potential techniques to improve the system spectral efficiency. In this work, efficient dynamic resource allocation algorithms are developed for downlink OFDM mobile cellular systems to support multimedia traffic. User channel responses are considered in the dynamic resource allocation to reduce interference and hence, to increase the system spectral efficiency while maintaining different Quality-of-Service (QoS) requirements. Performance of the proposed algorithms in terms of system throughput, fraction of satisfied users for voice, video, data and mixed services in multicell mobile communications systems is evaluated using analysis and simulation. |
