DocumentCode :
226810
Title :
Resource allocation based on subcarrier grouping in OFDMA cognitive radio networks
Author :
Yanyan Shen ; Kyung Sup Kwak ; Shuqiang Wang
Author_Institution :
Sch. of Inf. & Commun. Eng., Inha Univ., Incheon, South Korea
fYear :
2014
fDate :
24-26 Sept. 2014
Firstpage :
126
Lastpage :
130
Abstract :
In this paper, we investigate the subcarrier grouping based resource allocation in orthogonal frequency division multiple access cognitive radio networks. The objective is to maximize the secondary user´s minimal transmission rate, while taking into account the subcarrier grouping constraint, subcarrier allocation constraint, power allocation constraint, and the interference power constraint. The problem is formulated as a mixed integer programming problem. It can be solved by the exhaustive searching method, which has an exponential complexity. In order to decrease the computation complexity, a suboptimal fast algorithm will be developed. The suboptimal algorithm solves the subcarrier allocation and power allocation separately. By exploiting the structure of the problem, a fast power allocation algorithm based on the barrier method is proposed. Simulations have been done to verity the performance of the proposed algorithm.
Keywords :
OFDM modulation; cognitive radio; computational complexity; frequency division multiple access; integer programming; interference (signal); resource allocation; OFDMA cognitive radio networks; barrier method; computation complexity; exhaustive searching method; interference power constraint; mixed integer programming problem; orthogonal frequency division multiple access; power allocation constraint; resource allocation constraints; secondary user minimal transmission rate; subcarrier grouping allocation constraints; suboptimal fast algorithm; Cognitive radio; Computational complexity; Equations; Linear programming; Resource management; Standards;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Communications and Information Technologies (ISCIT), 2014 14th International Symposium on
Conference_Location :
Incheon
Type :
conf
DOI :
10.1109/ISCIT.2014.7011884
Filename :
7011884
Link To Document :
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