Joint relay selection, subcarrier pairing and power allocation for OFDM-based cooperative networks

In this paper, relay selection, subcarrier pairing and power allocation are investigated jointly to maximize the channel capacity for OFDM-based cooperative networks under a total power constraint. The problem can be formulated as a mixed binary integer programming problem, which is NP-hard and very...

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Published in:International Conference on Information Science and Technology pp. 1272 - 1276
Main Authors: Wendong Yang, Yueming Cai, Guoqin Kang
Format: Conference Proceeding
Language:English
Published: IEEE 01.03.2013
Subjects:
Channel capacity
Complexity theory
Joints
OFDM
Relays
Resource management
Signal to noise ratio
ISBN:1467351377, 9781467351379
ISSN:2164-4357
Online Access:Get full text
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Abstract In this paper, relay selection, subcarrier pairing and power allocation are investigated jointly to maximize the channel capacity for OFDM-based cooperative networks under a total power constraint. The problem can be formulated as a mixed binary integer programming problem, which is NP-hard and very difficult to manipulate. In order to achieve an acceptable performance with a proper complexity, we first solve the relay selection and subcarrier pairing problem under equal power allocation. Then, power allocation is performed according to the equivalent channel power gains of the subcarrier pairs using water-filling. Simulations are carried out to validate our analysis and show that the proposed scheme can achieve an acceptable capacity with a proper complexity.
AbstractList In this paper, relay selection, subcarrier pairing and power allocation are investigated jointly to maximize the channel capacity for OFDM-based cooperative networks under a total power constraint. The problem can be formulated as a mixed binary integer programming problem, which is NP-hard and very difficult to manipulate. In order to achieve an acceptable performance with a proper complexity, we first solve the relay selection and subcarrier pairing problem under equal power allocation. Then, power allocation is performed according to the equivalent channel power gains of the subcarrier pairs using water-filling. Simulations are carried out to validate our analysis and show that the proposed scheme can achieve an acceptable capacity with a proper complexity.
Author Yueming Cai
Wendong Yang
Guoqin Kang
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  surname: Wendong Yang
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  surname: Yueming Cai
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  organization: Coll. of Commun. Eng., PLA Univ. of Sci. & Technol., Nanjing, China
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  surname: Guoqin Kang
  fullname: Guoqin Kang
  email: kangguoqin@gmail.com
  organization: Acad. of Nat. Defense Inf., Wuhan, China
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Snippet In this paper, relay selection, subcarrier pairing and power allocation are investigated jointly to maximize the channel capacity for OFDM-based cooperative...
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StartPage 1272
SubjectTerms Channel capacity
Complexity theory
Joints
OFDM
Relays
Resource management
Signal to noise ratio
Title Joint relay selection, subcarrier pairing and power allocation for OFDM-based cooperative networks
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