Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 8 of 8 for “"spectrum monitoring"”.
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Spectrum sensing, spectrum monitoring, and security in cognitive radios
Spectrum sensing is a key function of cognitive radios and is used to determine whether a primary user is present in the channel or not. In this dissertation, we formulate and solve the generalized likelihood ratio test (GLRT) for spectrum sensing when both primary user transmitter and the …
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Study of Sensing Issues in Dynamic Spectrum Access
Dynamic Spectrum Access (DSA) is now a commonly used spectrum sharing paradigm to mitigate the spectrum shortage problem. DSA technology allows unlicensed secondary users to access the unused frequency bands without interfering with the incumbent users. The key technical challenges in DSA systems …
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Spectrum Management Issues in Centralized and Distributed Dynamic Spectrum Access
Dynamic spectrum access (DSA) is a powerful approach to mitigate the spectrum scarcity problem caused by rapid increase in wireless communication demands. Based on architecture design, DSA systems can be categorized as centralized and distributed. To successfully enable DSA, both centralized and …
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An analysis of spectrum allocation for the mobile phone services
… paper investigates the relationship between the spectrum allocation policy and the mobile broadband cost in 135 countries between 2012 and 2019, with a particular focus on developing countries. We construct a panel data collected from various sources such as World Development Indicator (WDI), …
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Machine Learning for Data-Driven Signal Separation and Interference Mitigation in Radio-Frequency Communication Systems
… including wireless communications, radar, and spectrum monitoring. This thesis addresses the challenge by focusing on data-driven approaches for source separation, leveraging datasets of sample realizations when source models are not explicitly provided. To this end, deep learning techniques …
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Design and FPGA Implementation of Optimized and Digital Multiplexing Spiking Encoders for Neuromorphic Computing
… in wireless communications, particularly in spectrum sensing for cognitive radios. Accurate identifica tion of occupied and unoccupied spectrum bands is vital to address spectrum scarcity and enable secondary users to make efficient use of available frequencies. Liquid State Ma chines (LSMs), …
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Spectrum sharing systems for improving spectral efficiency in cognitive cellular network
Since spectrum is the invisible infrastructure that powers the wireless communication, the demand has been exceptionally increasing in recent years after the implementation of 4G and immense data requirements of 5G due to the applications, such as Internet-of-Things (IoT). Therefore, the effective …
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Vysokofrekvenční jednotka pro přenosnou monitorovací stanici
Práce popisuje metody pro monitorování spektra používané Českým telekomunikačním úřadem, návrh vysokofrekvenční jednotky pro přenosnou monitorovací stanici a možnosti jejího využití. Vysokofrekvenční jednotka se skládá z několika samostatných zařízení ve formě bloků pospojovaných do výsledného …