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64531

Efficient and Robust Spectrum Allocation Algorithm for underlay Cognitive Radio Network under imperfect Channel State Information

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Last updated: 25 Dec 2024

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Abstract

Designing efficient radio resource allocation scheme for Underlay Cognitive radio (CR) has drawn many interests. Most of the existing works assumed perfect channel state information (CSI). In this paper, a spectrum allocation algorithm for underlay multi-user orthogonal frequency division multiplexing (MU-OFDM) based cognitive radio systems under imperfect CSI is proposed to maximize the throughput performance. During the first phase, the receiver estimates the channel and sends a feedback to the transmitter. During the second phase, the proposed scheme efficiently distributes the available subcarriers among cognitive users to maximize the cognitive network throughput while preserving the QoS of the primary users. The proposed algorithm considers the conventional Interference Power Constraint (IPC) to preserve the QoS of the primary users. The simulations results demonstrate that the proposed scheme significantly outperform the conventional IPC based scheme in terms of the achieved CR network throughput and the robustness against estimation error of CSI. Also, it is shown that the achieved CR throughput by the proposed algorithm is enhanced by 102% than that of the conventional IPC based schemes.

DOI

10.21608/mjeer.2018.64531

Keywords

Channel state information (CSI), cognitive radio, Interference Constraints, OFDM, spectrum sharing, subcarrier allocation

Authors

First Name

Kyrillos

Last Name

Youssef

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Affiliation

Dept. of Electronics and Electrical Communications, Faculty of Electronic Engineering, Menouf, Menoufia University, Egypt.

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First Name

Nagy

Last Name

Messiha

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Affiliation

Dept. of Electronics and Electrical Communications, Faculty of Electronic Engineering, Menouf, Menoufia University, Egypt

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First Name

Mohammed

Last Name

Abd-Elnaby

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Affiliation

Dept. of Electronics and Electrical Communications, Faculty of Electronic Engineering, Menouf, Menoufia University, Egypt

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Volume

27

Article Issue

1

Related Issue

9729

Issue Date

2018-01-01

Receive Date

2019-12-10

Publish Date

2018-01-01

Page Start

197

Page End

212

Print ISSN

1687-1189

Online ISSN

2682-3535

Link

https://mjeer.journals.ekb.eg/article_64531.html

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https://mjeer.journals.ekb.eg/service?article_code=64531

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11

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Original Article

Type Code

1,088

Publication Type

Journal

Publication Title

Menoufia Journal of Electronic Engineering Research

Publication Link

https://mjeer.journals.ekb.eg/

MainTitle

Efficient and Robust Spectrum Allocation Algorithm for underlay Cognitive Radio Network under imperfect Channel State Information

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Article

Created At

22 Jan 2023