Title :
Resource allocation for non-real-time services in OFDM-based cognitive radio systems
Author :
Zhang, Yonghong ; Leung, Cyril
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of British Columbia, Vancouver, BC
fDate :
1/1/2009 12:00:00 AM
Abstract :
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.
Keywords :
OFDM modulation; cognitive radio; resource allocation; OFDM; cognitive radio systems; non real time services; resource allocation; Algorithm design and analysis; Bit rate; Chromium; Cognitive radio; Delay; Interference; OFDM modulation; Resource management; Throughput; Time varying systems; Cognitive radio, multiuser OFDM, OFDMA,resource allocation, non-real-time.;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2009.081471
