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ISSN : 1738-6764

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Vol.12 No.1

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

INTERNATIONAL JOURNAL OF CONTENTS / INTERNATIONAL JOURNAL OF CONTENTS, (P)1738-6764; (E)2093-7504
2016, v.12 no.1, pp.70-75
https://doi.org/10.5392/IJoC.2016.12.1.070
임성묵 (한국교통대학교)
고균병 (한국교통대학교)
임성묵, & 고균병. (2016). . INTERNATIONAL JOURNAL OF CONTENTS, 12(1), 70-75, https://doi.org/10.5392/IJoC.2016.12.1.070

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.

keywords
Spectrum Sharing System, Heterogeneous System, OFDM, Power Allocation, Capacity

INTERNATIONAL JOURNAL OF CONTENTS

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