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Resource allocation for non-real-time services in OFDM-based cognitive radio systems

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2 Author(s)
Yonghong Zhang ; with the Department of Electrical and Computer Engineering, The University of British Columbia, 2332 Main Mall, Vancouver, B.C., Canada V6T 1Z4 (e-mail: ; Cyril Leung

We study the resource allocation (RA) problem in a multiuser OFDM-based cognitive radio (CR) system for non-realtime (NRT) applications in which average user data rates are to be maintained proportionally. In contrast to existing algorithms designed for multiuser OFDM systems, which are unable to guarantee users proportional rates when applied in a CR system, the proposed optimal RA algorithm ensures that CR user rates are maintained in proportion to predefined target rates while at the same time providing an improved system throughput.

Published in:

IEEE Communications Letters  (Volume:13 ,  Issue: 1 )