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Frequency Bands Classification Using Machine Learning for Frequency Hopping Spread Spectrum
Mälardalen University, School of Innovation, Design and Engineering, Embedded Systems.
Mälardalen University, School of Innovation, Design and Engineering, Embedded Systems.ORCID iD: 0000-0002-2419-2735
Mälardalen University, School of Innovation, Design and Engineering, Embedded Systems.ORCID iD: 0000-0002-7159-7508
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(English)Manuscript (preprint) (Other academic)
National Category
Computer Systems
Identifiers
URN: urn:nbn:se:mdh:diva-62054OAI: oai:DiVA.org:mdh-62054DiVA, id: diva2:1742733
Available from: 2023-03-10 Created: 2023-03-10 Last updated: 2023-03-10Bibliographically approved
In thesis
1. Spectrum Sensing for Cognitive Radio
Open this publication in new window or tab >>Spectrum Sensing for Cognitive Radio
2023 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This work focuses on the improvement of spectrum utilization by evaluating and proposing a subset of radio scene analysis algorithms for opportunistic spectrum access deployment in a cognitive radio network. The proposed algorithms aim to solve two problems: detecting vacant frequency channels and estimating the waveform, including modulation type, symbol rate, and central frequency. To test and prove the hypothesis three research questions related to radio scene observation, classification, and estimation have been formulated, studied, and answered. A two-step spectrum sensing algorithm has been proposed. The first step covers the coarse classification of the observed band into three broad categories: white, gray, or black space, commonly used in the literature to describe spectrum occupancy. Various machine learning algorithms were applied and tested for the coarse classification step. Fine decision trees demonstrated the highest classification accuracy and speed. The second step covers the detailed gray space analysis performed to detect vacant channels and waveforms of the signals present in the observed band. Algorithms such as cyclostationary, energy detection, and wavelet transform were employed for solving the vacant channel detection. The hypothesis has been proven by demonstrating the possibility of blind real-time vacant frequency channel detection using discrete wavelet transform and energy detection within the time compatible with real-time operation and 5G latency requirements on the test hardware.

Place, publisher, year, edition, pages
Västerås: Mälardalens universitet, 2023
Series
Mälardalen University Press Dissertations, ISSN 1651-4238 ; 373
National Category
Engineering and Technology Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Electronics
Identifiers
urn:nbn:se:mdh:diva-61898 (URN)978-91-7485-583-8 (ISBN)
Public defence
2023-04-12, Gamma, Mälardalens universitet, Västerås, 09:15 (English)
Opponent
Available from: 2023-02-14 Created: 2023-02-13 Last updated: 2023-03-22Bibliographically approved

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Valieva, InnaBjörkman, MatsÅkerberg, JohanEkström, Mikael

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