TIIS (한국인터넷정보학회)
Current Result Document :
| 한글제목(Korean Title) |
Efficient Resource Allocation with Multiple Practical Constraints in OFDM-based Cooperative Cognitive Radio Networks |
| 영문제목(English Title) |
Efficient Resource Allocation with Multiple Practical Constraints in OFDM-based Cooperative Cognitive Radio Networks |
| 저자(Author) |
Xuezhou Yang
Wei Tang
Wei Guo
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| 원문수록처(Citation) |
VOL 08 NO. 07 PP. 2350 ~ 2364 (2014. 07) |
한글내용
(Korean Abstract) |
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영문내용
(English Abstract) |
This paper addresses the problem of resource allocation in amplify-and-forward (AF) relayed OFDM based cognitive radio networks (CRNs). The purpose of resource allocation is to maximize the overall throughput, while satisfying the constraints on the individual power and the interference induced to the primary users (PUs). Additionally, different from the conventional resource allocation problem, the rate-guarantee constraints of the subcarriers are considered. We formulate the problem as a mixed integer programming task and adopt the dual decomposition technique to obtain an asymptotically optimal power allocation, subcarrier pairing and relay selection. Moreover, we further design a suboptimal algorithm that sacrifices little on performance but could significantly reduce computational complexity. Numerical simulation results confirm the optimality of the proposed algorithms and demonstrate the impact of the different constraints.
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| 키워드(Keyword) |
CRN
OFDM
AF
cooperative communication
joint resource allocation
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| 파일첨부 |
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