CSI-Based Resource Allocation for OFDM Downlink Broadband Multimedia Services in Cellular Systems

Authors:
Navid Damji;Tho Le-Ngoc
Affiliations:
Department of Electrical and Computer Engineering, McGill University, Montreal, Canada H3A 2A7;Department of Electrical and Computer Engineering, McGill University, Montreal, Canada H3A 2A7
Venue:
Wireless Personal Communications: An International Journal
Year:
2011

Citing 8
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Abstract

Using channel state information (CSI) in resource allocation in Orthogonal Frequency Division Multiplexing (OFDM) wireless cellular systems has been recently considered to improve the overall throughput. This paper presents an analytical framework to compare the performance of two resource allocation schemes, using CSI-based and random sub-carrier selection, in terms of their user outage probability and throughput in relation to the system load in frequency-selective fading and interference-limited environments. Analytical and simulation results are in good agreement and indicate that a proper use of CSI can achieve substantially better performance in interference limited cellular systems as compared to the blind approach and thus show the benefits of multi-user diversity.