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 20 of 26 for “"Wireless Local Area Networks (WLANs)"”.
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Enhancing Security in 802.11 and 802.1 X Networks with Intrusion Detection
The convenience and low cost of 802.11-based Wireless Local Area Networks (WLANs) complemented with 802.1 X authentication has led to widespread deployment in the consumer, industrial and military sectors. The combination of wireless signals radiating further than the intended coverage area, flaws …
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An implementation of a 5.25 GHz transceiver for high data rate wireless applications
… of high data rate information across wireless channels has grown immensely over the past decade. Wireless devices available today including mobile phones, wireless local area networks (WLANs) and Bluetooth radios have realized a wide variety of applications at data rates ranging from …
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Spread OFDM via carrier interferometry spreading codes: performance, throughput, and PAPR enhancement
… (OFDM) has been an important technique in wireless communication architectures since the 1970's and 1980's. OFDM is now the protocol in the IEEE 802.11a and IEEE 802.1 lg Wireless Local Area Networks (WLANs) standards, as well as the IEEE 802.16 Fixed Broadband standard. It is also a …
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Power evaluation and performance enhancement of CSMA/CA based WLANs.
… Access with Collision Avoidance (CSMA/CA) based Wireless Local Area Networks (WLANs) are becoming pervasive. As the most commonly employed standard in WLANs, IEEE 802.11 not only gives rise to health and safety concern from the general public, but also has the potential for enhanced performance. …
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Sistemas integrados de la navegación mediante redes locales inalámbricas
… explains the methodology used in the design of Wireless Local Area Networks (WLANs) and puts forward one particular configuration suitable for Integrated Navigation Systems (INSs).The choice of the Extremely High Frequency band (EHF) is based on two fundamental reasons. Firstly, EHF waves range …
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Towards next generation WLANs: exploiting coordination and cooperation
Wireless Local Area Networks (WLANs) operating in the industrial, scientific and medical (ISM) radio bands have gained great popularity and increasing usage over the past few years. The corresponding MAC/PHY specification, the IEEE 802.11 standard, has also evolved to adapt to such development. …
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Improving packet delivery efficiency using multi-radio diversity in wireless LANs
Data transmissions in Wireless Local Area Networks (WLANs) often suffer from bit errors that arise from the notoriously complex and time-varying signal propagation characteristics of the wireless medium. A number of physical factors such as attenuation and multi-path are prevalent indoors and can …
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Performance Evaluation of DECT in Different Radio Environments
… are broadening with the advent of PCS services, wireless local loop (WLL), and the increasing demand for high data-rate wireless local area networks (WLANs). This thesis investigates the performance of DECT in different channel conditions. DECT is simulated using the Signal Processing WorkSystem …
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Applying Machine Learning to Advance Cyber Security: Network Based Intrusion Detection Systems
… as well as traditional computer systems, rely on wireless connections to the Internet and are susceptible to attacks. Two important types of attacks are the use of malware and exploiting Internet protocol vulnerabilities in devices and network systems. These attacks form a threat on many levels …
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Load-Aware Traffic Control in Software-Defined Enterprise Wireless Local Area Networks
… Bring Your Own Device (BYOD), modern enterprise Wireless Local Area Networks (WLANs) deployments always consist of multiple Access Points (APs) to meet the fast-increasing demand for wireless access. In order to avoid network congestion which leads to issues such as suboptimal Quality of Service …
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Design of Media Access Control Schemes for Performance Enhancement of Future Generation Wireless Systems
Wireless Local Area Networks (WLANs) now provide connectivity to many businesses, homes and educational institutions. The wireless channel itself is plagued with numerous problems, such as it does not natively allow sharing of the wireless resource. WLAN devices utilize a complex medium access …
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Interference Measurements and Throughput Analysis for 2.4 GHz Wireless Devices in Hospital Environments
In recent years, advancements in the field of wireless communication have led to more innovative consumer products at reduced cost. Over the next 2 to 5 years, short-range wireless devices such as Bluetooth and Wireless Local Area Networks (WLANs) are expected to become widespread throughout …
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Research and development of a reference model for intrusion handling systems in wireless LANs
Wireless Local Area Networks (WLANs) are different from the traditional wired LANs in terms of their easy exposure to potential threats and vulnerability to exploitation. Hence, there is an urgent need for effective Intrusion Handling Systems (IHSs) and the methods for their evaluation. Analyses of …
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An admission control scheme for IEEE 802.11e wireless local area networks
… increase in the deployment and use of 802.11 Wireless Local Area Networks (WLANs). These networks are easy to deploy and maintain, while providing reasonably high data rates at a low cost. In the paradigm of Next-Generation-Networks (NGNs), WLANs can be seen as an important access network …
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Developing an SDWN Architecture for Wireless Network Engineering to Support a Quality of Experience Aware Handover
… growth of data consumption and the variety of wireless technology emergence has made the handover (HO) an attractive research topic nowadays, mainly due to the popularity of Wireless Local Area Networks (WLANs), which allow users to reach high-speed data communication while they are in …
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A fuzzy logic based approach to quality of service in 802.11b wireless networks
… of the data transmitted across packet switched networks in the future will be video and audio traffic. In recent years public telecommunications carriers have replaced circuit switched networks with integrated service packet networks that support both multimedia and data. One challenge with …
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Energy-Efficient Medium Access Control Protocols and Network Coding in Green Wireless Networks
Wireless networks are a popular means of communications in daily social and business activities of many users nowadays. However, current estimates indicate that wireless networks are expected to significantly contribute to the rapidly increasing energy consumption and carbon emissions of the …
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Interference Modelling and Analysis of OFDM in Wireless Environments
The ubiquity of mobile broadband wireless communication systems in today's world is a testament to the robustness and success of radio-based telecommunications. Since the emergence of commercial cellular systems in the early 1980s, there has been an explosive growth in the demand and development of …
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Analysis and improvement of medium access control protocols in wireless networks. Performance modelling and Quality-of-Service enhancement of IEEE 802.11e MAC in wireless local area networks under heterogeneous multimedia traffic.
In order to efficiently utilize the scarce wireless resource as well as keep up with the ever-increasing demand for Quality-of-Service (QoS) of multimedia applications, wireless networks are undergoing rapid development and dramatic changes in the underlying technologies and protocols. The Medium …
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A 60 Ghz Mmic 4x Subharmonic Mixer
… of information, the demands on data transmission networks for greater capacity, and mobile accessibility are increasing drastically. The increasing demand for mobile access is evidenced by the proliferation of wireless systems such as mobile phone networks and wireless local area networks (WLANs). …
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