Power Allocation and Capacity Analysis of Secondary User in Heterogeneous Spectrum Sharing Systems

In this paper, we considered heterogeneous spectrum sharing system where the number of subcarriers of the primary user (PU) was twice as much as that of the secondary user (SU). In this case, due to non-orthogonality and inter-carrier interference (ICI) from SU to PU, it is difficult to satisfy the...

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Published inInternational JOURNAL OF CONTENTS Vol. 12; no. 1; pp. 70 - 75
Main Authors Lim, Sungmook, Ko, Kyunbyoung
Format Journal Article
LanguageEnglish
Published 한국콘텐츠학회(IJOC) 28.03.2016
한국콘텐츠학회
Subjects
컴퓨터학
Power Allocation
OFDM
Spectrum Sharing System
Capacity
Heterogeneous System
Online AccessGet full text
ISSN1738-6764
2093-7504
DOI10.5392/IJoC.2016.12.1.070

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Abstract In this paper, we considered heterogeneous spectrum sharing system where the number of subcarriers of the primary user (PU) was twice as much as that of the secondary user (SU). In this case, due to non-orthogonality and inter-carrier interference (ICI) from SU to PU, it is difficult to satisfy the interference constraint of PU. In order to mitigate ICI and satisfy the interference constraint, we proposed a new transmission scheme of the SU with power allocation scheme. The proposed scheme will only generate subcarrier-by-subcarrier interference. Therefore, it can easily satisfy the interference constraint of the PR and enhance the capacity of the SU. In addition, we derived the ergodic capacity of the SU. Based on numerical results, we confirmed that the proposed schemes could guarantee SU with a reliable capacity while satisfying the interference constraint of the PU. In addition, the derived capacity well matched the numerical results. KCI Citation Count: 0
AbstractList In this paper, we considered heterogeneous spectrum sharing system where the number of subcarriers of the primary user (PU) was twice as much as that of the secondary user (SU). In this case, due to non-orthogonality and inter-carrier interference (ICI) from SU to PU, it is difficult to satisfy the interference constraint of PU. In order to mitigate ICI and satisfy the interference constraint, we proposed a new transmission scheme of the SU with power allocation scheme. The proposed scheme will only generate subcarrier-by-subcarrier interference. Therefore, it can easily satisfy the interference constraint of the PR and enhance the capacity of the SU. In addition, we derived the ergodic capacity of the SU. Based on numerical results, we confirmed that the proposed schemes could guarantee SU with a reliable capacity while satisfying the interference constraint of the PU. In addition, the derived capacity well matched the numerical results. KCI Citation Count: 0
Author Kyunbyoung Ko
Sungmook Lim
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Cites_doi 10.1109/JPROC.2009.2015717
10.1109/MCOM.2005.1452816
10.1109/TWC.2013.092513.121999
10.1109/TWC.2012.020712.102197
10.1109/TWC.2007.05447
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Keywords Power Allocation
OFDM
Spectrum Sharing System
Capacity
Heterogeneous System
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Title Power Allocation and Capacity Analysis of Secondary User in Heterogeneous Spectrum Sharing Systems
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