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Location-based resource allocation for OFDMA cognitive radio systems

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3 Author(s)
Haewoon Nam ; Mobile Devices Technology Office, Motorola Inc., Austin, TX, USA ; Mahdi Ben Ghorbel ; Mohamed-Slim Alouini

In cognitive radio systems, in order for the secondary users to opportunistically share the spectrum without interfering the primary users, an accurate spectrum measurement and a precise estimation of the interference at the primary users are necessary but are challenging tasks. Since it is impractical in cognitive radio systems to assume that the channel state information of the interference link is available at the cognitive transmitter, the interference at the primary users is hard to be estimated accurately. This paper introduces a resource allocation algorithm for OFDMA-based cognitive radio systems, which utilizes location information of the primary and secondary users instead of the channel state information of the interference link. Simulation results show that it is indeed effective to incorporate location information into resource allocation so that a near-optimal capacity is achieved.

Published in:

2010 Proceedings of the Fifth International Conference on Cognitive Radio Oriented Wireless Networks and Communications

Date of Conference:

9-11 June 2010