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 66 for “"WiMAX"”.
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NS-3 Simulation of WiMAX Networks
… thesis, we translate and update a sophisticated WiMAX simulation model from NS-2 to NS-3, and use this experience to investigate the major differences between NS-2 and NS-3, and the relative strengths of each package. We then use the NS-3 simulation model to provide analysis on a new WiMAX OFDMA …
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WiMAX spectrum virtualization and network federation
… virtualization and network federation using the WiMAX (Worldwide Interoperability for Microwave Exchange) wireless broadband technology. The proposed WiMAX spectrum virtualization architecture introduces a novel entity known as the Virtual Spectrum Hypervisor (VS-Hypervisor). This VS-Hypervisor …
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Handover Performance in the Mobile WiMAX Netrworks
… in-depth study of the handover effects of mobile WiMAX networks is carried out. The mobile WiMAX technology is first presented as literature study and then the technologies of handovers for previous generations are introduced in detail. Further, the hard handover of the mobile WiMAX is simulated …
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Virtualization of multicast services in WiMAX networks
… Worldwide Interoperability for Microwave Access (WiMAX) networks using NS-3. The performance evaluation was based on whether MILP is used or not used. The results of experimentation have revealed that there is good performance of virtual networks when multicast traffic is sent over one single …
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A Combined WiMAX/DSRC Approach to Vehicular Networking
… thesis examines the strengths and weaknesses of WiMAX and DSRC, two protocols that have been central in much of the research surrounding in-vehicle network access. The thesis then proposes a novel system structure that combines both of these technologies and adds a network access layer in order …
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Ofdm system cyclic prefix characteristic analaysis for wimax technology
… Worldwide Interoperability for Microwave Access (WIMAX) system based on Orthogonal Frequency Division Multiplexing (OFDM) with different adaptive modulation techniques is currently the topic of discussion.WIMAX is the next generation of broadband wireless technology which offers a greater range …
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Cross-Layer Capacity Optimization In OFDMA Systems: WiMAX And LTE
… wireless interoperability for microwave access (Wimax) and long term evolution (lte) adopted by international standards. This thesis considers orthogonal frequency division multiple access (ofdma) system, which has been implemented in both Wimax and lte technologies as their air interface …
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An adaptive SVC-video streaming scheme for mobile WiMAX networks
… during a video stream delivery over the Mobile WiMAX network, which results in video quality degradation. To address this problem, H.264AVC/SVC coded video is used.
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A Performance Comparison of Frame Structures in WiMAX Multi-Hop Relay Networks
… and metropolitan area networks, else known as WiMAX. Relay systems come in different flavours, based on their capabilities and have the potential to offer many advantages over the single-hop technology. Upcoming broadband wireless technologies, that utilize multi-hop relays, need good network …
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Evaluation performance of OFDM system using the selected mapping technique for WIMAX technology
Orthogonal Frequency Division Multiplexing (OFDM) is a promising technique used in the wireless broadband communication systems these days. It is a form of multicarrier modulation technique with high spectral efficiency, robustness to channel fading, immunity to impulse interference, uniform …
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Performance analysis and application development of hybrid WiMAX-WiFi IP video surveillance systems
… is a paradigm shift towards wireless solutions (WiMAX, Wi-Fi, 3G, 4G) to complement and in some cases replace the wired system. A wireless solution of the Fourth-Generation Surveillance System (4GSS) has been proposed in this thesis. It is a hybrid WiMAX-WiFi video surveillance system. The …
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Second-order Cyclostationary Feature Based Detection of WiMAX Signals in Pulsed Noise Environments
Spectral coexistence and cooperative spectrum sharing techniques are vital to the continued development and proliferation of wireless communications systems. Government directives indicate that certain frequency bands which once were reserved for radar-only applications must now support wireless …
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Monostatic Airborne Synthetic Aperture Radar Using Commercial WiMAX Transceivers In the License-exempt Spectrum
… Worldwide interoperability for Microwave Access (WiMAX) are the first option, owing to their accessibility, similarity and economy. This dissertation first demonstrates the feasibility of applying WiMAX to SAR by discussing their similar features. Despite the similarities they share, the …
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Development of triple band planar inverted-H antenna for DCS, WIMAX and WLAN application
… band inverted-H planar antenna for DCS1700, WiMAX2600 and WLAN3100 is presented. The antenna consists of square planar radiating patch with dual rectangular slots suspended above the FR4 dielectric substrate. The antenna is fed by using microstrip transmission line feeding, as it is easier to …
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Implementation and Performance Evaluation of an NGN prototype using WiMax as an Access Technology
… the QoS requirements of network traffic between WiMax and an IP core network. In the work, a solution based on the concept of class-of-service mapping is proposed. In the proposed solution, QoS is implemented on the two networks and the concept of class-of-service mapping is used to integrate the …
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Energy efficient radio frequency system design for mobile WiMax applications. Modelling, optimisation and measurement of radio frequency power amplifier covering WiMax bandwidth based on the combination of class AB, class B, and C operations.
… 3.4 - 3.6 GHz frequency band of Europe mobile WiMAX. The experimental results show that 30dBm output power can be achieved with 67% power added efficiency (PAE) for the user terminal, and 45dBm with 66% power added efficiency (PAE) for base stations which marks a 14% and 11% respective …
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Bit error rate estimation in WiMAX communications at vehicular speeds using Nakagami-m fading model
… Worldwide Interoperability for Microwave Access (WiMAX) has been accepted as a 4G standard by the Institute of Electrical and Electronics Engineers in 2011. The IEEE 802.16m is fully optimised for wireless communications in fixed environments and can deliver very high throughput and excellent …
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Diseño de una red telemática para dar acceso a internet mediante redes WiMAX/Wi-Fi
Diseño de una red mediante tecnología WiMAX y Wi-Fi para dar acceso a Internet en la localidad de Mocejón (Toledo).
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Performance enhancements in next generation wireless networks using network coding : a case study in WiMAX
… a packet erasure code below the IP layer. Using WiMAX as a case study, a series of point-to-point single-interface experiments are conducted to compare the performance of the architecture to that of HARQ and ARQ mechanisms. The performance measures are packet loss percentage, throughput and file …
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