Resource Allocation in a Cognitive Radio System with Imperfect Channel State Estimation
Cognitive radio (CR) is a promising concept for improving the utilization of scarce radio spectrum resources. Orthogonal frequency division multiplexing (OFDM) is regarded as a technology which is well matched for CR systems. It is shown that channel estimation errors can result in a severe performa...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2010-01-01
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| Series: | Journal of Electrical and Computer Engineering |
| Online Access: | http://dx.doi.org/10.1155/2010/419430 |
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| _version_ | 1832550805089026048 |
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| author | Tao Qin Cyril Leung Chunyan Miao Zhiqi Shen |
| author_facet | Tao Qin Cyril Leung Chunyan Miao Zhiqi Shen |
| author_sort | Tao Qin |
| collection | DOAJ |
| description | Cognitive radio (CR) is a promising concept for improving the utilization of scarce radio spectrum resources. Orthogonal frequency division multiplexing (OFDM) is regarded as a technology which is well matched for CR
systems. It is shown that channel estimation errors can result in a severe performance degradation
in a multiuser OFDM CR system. A simple back-off scheme is proposed, and simulation results are provided which show that the proposed scheme is very effective in mitigating the negative impact of channel estimation errors. |
| format | Article |
| id | doaj-art-df65706cd84d4c70af2c9932a0f9e077 |
| institution | Kabale University |
| issn | 2090-0147 2090-0155 |
| language | English |
| publishDate | 2010-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Electrical and Computer Engineering |
| spelling | doaj-art-df65706cd84d4c70af2c9932a0f9e0772025-02-03T06:05:47ZengWileyJournal of Electrical and Computer Engineering2090-01472090-01552010-01-01201010.1155/2010/419430419430Resource Allocation in a Cognitive Radio System with Imperfect Channel State EstimationTao Qin0Cyril Leung1Chunyan Miao2Zhiqi Shen3School of Computer Engineering, Nanyang Technological University, 639798, SingaporeDepartment of Electrical and Computer Engineering, The University of British Columbia, Vancouver, B.C., V6T 1Z4, CanadaSchool of Computer Engineering, Nanyang Technological University, 639798, SingaporeSchool of Electrical and Electronic Engineering, Nanyang Technological University, 639798, SingaporeCognitive radio (CR) is a promising concept for improving the utilization of scarce radio spectrum resources. Orthogonal frequency division multiplexing (OFDM) is regarded as a technology which is well matched for CR systems. It is shown that channel estimation errors can result in a severe performance degradation in a multiuser OFDM CR system. A simple back-off scheme is proposed, and simulation results are provided which show that the proposed scheme is very effective in mitigating the negative impact of channel estimation errors.http://dx.doi.org/10.1155/2010/419430 |
| spellingShingle | Tao Qin Cyril Leung Chunyan Miao Zhiqi Shen Resource Allocation in a Cognitive Radio System with Imperfect Channel State Estimation Journal of Electrical and Computer Engineering |
| title | Resource Allocation in a Cognitive Radio System with
Imperfect Channel State Estimation |
| title_full | Resource Allocation in a Cognitive Radio System with
Imperfect Channel State Estimation |
| title_fullStr | Resource Allocation in a Cognitive Radio System with
Imperfect Channel State Estimation |
| title_full_unstemmed | Resource Allocation in a Cognitive Radio System with
Imperfect Channel State Estimation |
| title_short | Resource Allocation in a Cognitive Radio System with
Imperfect Channel State Estimation |
| title_sort | resource allocation in a cognitive radio system with imperfect channel state estimation |
| url | http://dx.doi.org/10.1155/2010/419430 |
| work_keys_str_mv | AT taoqin resourceallocationinacognitiveradiosystemwithimperfectchannelstateestimation AT cyrilleung resourceallocationinacognitiveradiosystemwithimperfectchannelstateestimation AT chunyanmiao resourceallocationinacognitiveradiosystemwithimperfectchannelstateestimation AT zhiqishen resourceallocationinacognitiveradiosystemwithimperfectchannelstateestimation |