期刊
IEEE COMMUNICATIONS LETTERS
卷 13, 期 1, 页码 16-18出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LCOMM.2009.081471
关键词
Cognitive radio; multiuser OFDM; OFDMA; resource allocation; non-real-time
资金
- Natural Sciences and Engineering Research Council of Canada (NSERC) [OGP0001731]
- UBC PMC-Sierra Professorship in Networking and Communications
We study the resource allocation (RA) problem in a multiuser OFDM-based cognitive radio (CR) system for non-real-time (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.
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