NDLI: Resource allocation algorithm for downlink MIMO-OFDMA based cognitive radio networks in spectrum underlay scenario

Content Provider	IET Digital Library
Author	Mohammadi, Mahla Andargoli, Seyed Mehdi Hosseini
Abstract	In this study, the sum throughput maximisation problem for cognitive radio networks (CRNs) based on the multiple-input multiple-output orthogonal frequency division multiple access (MIMO-OFDMA) structure has been investigated. Hence, the intention is to maximise the downlink sum throughput of the CRN in a way that the sum power of the cognitive base station (CBS) remains below the given power limit and the induced interference on each subcarrier guarantees the interference threshold level predefined by primary users. Here, due to combinatorial constraints, the complex problem should be resolved. Hence, the core purpose of this study is to prepare a novel resource assignment algorithm that tries to fulfil these combinatorial constraints simultaneously. Therefore, this study makes progress towards solving the problem theoretically based on convex optimisation framework. An optimal solution has been implemented by proposing the iterative algorithm in which an optimal level of Lagrangian coefficients is obtained. Then, because of the optimal algorithm intricacy, the two low complicated algorithms are further suggested based on the solutions of two simplified versions of the original problem. Numerical results demonstrate that the suggested algorithms improve sum throughput considerably in comparison with classical algorithm. The proposed simplified algorithms converge to the optimal solutions’ performance while their complexities are desirable for practical implementation.
Starting Page	1811
Ending Page	1820
Page Count	10
ISSN	17518628
Volume Number	14
e-ISSN	17518636
Issue Number	Issue 11, Jul (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/14/11
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2019.0512
Journal	IET Communications
Publisher Date	2020-04-01
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	CBS Cognitive Base Station Cognitive Radio Cognitive Radio Network Combinatorial Constraint Complex Problem Convex Optimisation Framework Convex Programming CRN Downlink MIMO-OFDMA Structure Electromagnetic Compatibility Frequency Division Multiple Access Induced Interference Threshold Level Interference Interpolation And Function Approximation Iterative Algorithm Iterative Method Lagrangian Coefficient Legislation, Frequency Allocation And Spectrum Pollution Low Complicated Algorithm Maximisation Problem MIMO Communication Modulation And Coding Method Multiple Access Communication Multiple-input Multiple-output Orthogonal Frequency Division Multiple Access Structure Numerical Analysis OFDM Modulation Optimal Algorithm Intricacy Optimisation Technique Radio Frequency Interference Radio Link And Equipment Radio Network Radio Spectrum Management Resource Allocation Resource Allocation Algorithm Resource Assignment Algorithm Spectrum Underlay Scenario Sum Throughput Maximisation Problem
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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