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 13 of 13 for “"802.11n"”.
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A measurement study of 802.11n links on commodity hardware
802.11n is one of the recently ratified drafts for wireless networks. We modify an open-source wireless card device driver and conduct a performance analysis study. We find by measurements that the currently implemented algorithm in the open source device driver fails to successfully converge to …
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Empirical Approch For Rate Selection In MIMO OFDM
… short range wireless data application such as 802.11a/g, 802.15.3a and 802.16. Recently, use of multiple transmit and receive antenna for improving spectral efficiency in a wireless system has received much interest. IEEE 802.11 has set up the Work Group 802.11n to develop a standard for …
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Augmenting Wireless Security Using Zero-Forcing Beamforming
… capabilities of existing technologies such as 802.11n and the upcoming 802.11ac standard where multi-antenna APs construct simultaneous data streams using Zero-Forcing Beamforming (ZFBF). Instead of using this technique for simultaneous data stream generation, STROBE utilizes ZFBF by allowing …
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A Hardware Generator for Factor Graph Applications
… generated LDPC decoders, including contemporary 802.11n decoders, have been examined as a verification of the system and as a demonstration of its capabilities. As a further demonstration, the framework has been applied to construct a Sudoku solver.
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Application-driven exploration of a programmable platform for Wireless LAN
… and executable system model of IEEE 802.11n Wireless LAN is presented as an example. The model drives architectural design space exploration, resulting in indicative system cost estimates and a platform architecture template. A software-based FPGA prototype is implemented that …
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MAC layer resource allocation algorithms for OFDM/TDMA wireless networks
… algorithms are compared with existing 4G and 802.11n/ac network protocols
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Towards a Wireless Aircraft
… is addressed. Two standards are recommended: 802.11n and ZigBee and these are tested in a variety of environments such as a reverberation chamber and avionics bays in a Tornado, to demonstrate the levels of time delay spread needed to prevent a wireless system from working. In particular, the …
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The optimization of multiple antenna broadband wireless communications. A study of propagation, space-time coding and spatial envelope correlation in Multiple Input, Multiple Output radio systems
… distributions for a commercial dual band 802.11n MIMO radio operating indoors in a variety of line of sight and non-line of sight scenarios. The physical model of the space is based on architectural schematics, and realistic propagation data for the construction materials. The modelling is …
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Advanced Protocols for Peer-to-Peer Data Transmission in Wireless Gigabit Networks
This thesis tackles problems on IEEE 802.11 MAC layer, network layer and application layer, to further push the performance of wireless P2P applications in a holistic way. It contributes to the better understanding and utilization of two major IEEE 802.11 MAC features, frame aggregation and block …
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Improving Performance for CSMA/CA Based Wireless Networks
… increasingly higher bandwidth. Some recent IEEE 802.11n proposals seek to provide PHY rates of up to 600 Mbps. In addition to increasing bandwidth, there is also strong interest in extending the coverage of CSMA/CA based wireless networks. One solution is to relay traffic via multiple …
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Distributed mobile platforms and applications for intelligent transportation systems
… deployed it on 10 vehicles using 4G (LTE), 802.11p DSRC and 802.11n adhoc WiFi, and measured cellular access reductions up to 84%, response time improvements up to 80%, and effectiveness of the system in enforcing congestion control policies. We also simulated large-scale scenarios using …
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Design of MAC protocols to support quality of service for multimedia traffic in wireless LANs
Since the introduction of 802.11 MAC protocol standards for wireless local area network (WLAN) in 1999 by the IEEE task force group, WLAN has experienced tremendous growth. This can be observed by the increasing number of “hotspots” in public places such as airports, train stations, shopping …
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Optimización algorítmica orientada a la implementación en dispositivos reconfigurables de esquemas multiestándar y multiusuario para sincronismo de frecuencia en sistemas de comunicaciones inalámbricas basados en OFDM
… de comunicaciones basadas en paquetes, como 802.11g/n ó 802.16d, sistemas basados en transmisión continua, como DVB-T y en sistemas donde se espera gran movilidad, cómo LTE. A continuación, se propone una solución integrada para la sincronización de frecuencia de un sistema multiestándar. …