Cargando…
Joint Subchannel Pairing and Power Control for Cognitive Radio Networks with Amplify-and-Forward Relaying
Dynamic spectrum sharing has drawn intensive attention in cognitive radio networks. The secondary users are allowed to use the available spectrum to transmit data if the interference to the primary users is maintained at a low level. Cooperative transmission for secondary users can reduce the transm...
Autores principales: | , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Hindawi Publishing Corporation
2014
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4083832/ https://www.ncbi.nlm.nih.gov/pubmed/25045731 http://dx.doi.org/10.1155/2014/380106 |
_version_ | 1782324421812289536 |
---|---|
author | Shen, Yanyan Wang, Shuqiang Wei, Zhiming |
author_facet | Shen, Yanyan Wang, Shuqiang Wei, Zhiming |
author_sort | Shen, Yanyan |
collection | PubMed |
description | Dynamic spectrum sharing has drawn intensive attention in cognitive radio networks. The secondary users are allowed to use the available spectrum to transmit data if the interference to the primary users is maintained at a low level. Cooperative transmission for secondary users can reduce the transmission power and thus improve the performance further. We study the joint subchannel pairing and power allocation problem in relay-based cognitive radio networks. The objective is to maximize the sum rate of the secondary user that is helped by an amplify-and-forward relay. The individual power constraints at the source and the relay, the subchannel pairing constraints, and the interference power constraints are considered. The problem under consideration is formulated as a mixed integer programming problem. By the dual decomposition method, a joint optimal subchannel pairing and power allocation algorithm is proposed. To reduce the computational complexity, two suboptimal algorithms are developed. Simulations have been conducted to verify the performance of the proposed algorithms in terms of sum rate and average running time under different conditions. |
format | Online Article Text |
id | pubmed-4083832 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2014 |
publisher | Hindawi Publishing Corporation |
record_format | MEDLINE/PubMed |
spelling | pubmed-40838322014-07-20 Joint Subchannel Pairing and Power Control for Cognitive Radio Networks with Amplify-and-Forward Relaying Shen, Yanyan Wang, Shuqiang Wei, Zhiming ScientificWorldJournal Research Article Dynamic spectrum sharing has drawn intensive attention in cognitive radio networks. The secondary users are allowed to use the available spectrum to transmit data if the interference to the primary users is maintained at a low level. Cooperative transmission for secondary users can reduce the transmission power and thus improve the performance further. We study the joint subchannel pairing and power allocation problem in relay-based cognitive radio networks. The objective is to maximize the sum rate of the secondary user that is helped by an amplify-and-forward relay. The individual power constraints at the source and the relay, the subchannel pairing constraints, and the interference power constraints are considered. The problem under consideration is formulated as a mixed integer programming problem. By the dual decomposition method, a joint optimal subchannel pairing and power allocation algorithm is proposed. To reduce the computational complexity, two suboptimal algorithms are developed. Simulations have been conducted to verify the performance of the proposed algorithms in terms of sum rate and average running time under different conditions. Hindawi Publishing Corporation 2014 2014-06-15 /pmc/articles/PMC4083832/ /pubmed/25045731 http://dx.doi.org/10.1155/2014/380106 Text en Copyright © 2014 Yanyan Shen et al. https://creativecommons.org/licenses/by/3.0/ This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Research Article Shen, Yanyan Wang, Shuqiang Wei, Zhiming Joint Subchannel Pairing and Power Control for Cognitive Radio Networks with Amplify-and-Forward Relaying |
title | Joint Subchannel Pairing and Power Control for Cognitive Radio Networks with Amplify-and-Forward Relaying |
title_full | Joint Subchannel Pairing and Power Control for Cognitive Radio Networks with Amplify-and-Forward Relaying |
title_fullStr | Joint Subchannel Pairing and Power Control for Cognitive Radio Networks with Amplify-and-Forward Relaying |
title_full_unstemmed | Joint Subchannel Pairing and Power Control for Cognitive Radio Networks with Amplify-and-Forward Relaying |
title_short | Joint Subchannel Pairing and Power Control for Cognitive Radio Networks with Amplify-and-Forward Relaying |
title_sort | joint subchannel pairing and power control for cognitive radio networks with amplify-and-forward relaying |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4083832/ https://www.ncbi.nlm.nih.gov/pubmed/25045731 http://dx.doi.org/10.1155/2014/380106 |
work_keys_str_mv | AT shenyanyan jointsubchannelpairingandpowercontrolforcognitiveradionetworkswithamplifyandforwardrelaying AT wangshuqiang jointsubchannelpairingandpowercontrolforcognitiveradionetworkswithamplifyandforwardrelaying AT weizhiming jointsubchannelpairingandpowercontrolforcognitiveradionetworkswithamplifyandforwardrelaying |