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 22 for “"Smart Antennas"”.
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Randomly Spaced Smart Antennas
… beamforming. The advantages and disadvantages of smart antennas based on random array con- figuration are presented and discussed. Several algorithms have been investigated to study the most suitable ones for optimizing the distribution of the excitation coe- cients. The work discussed herein can …
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Smart Antennas & Power Management in Wireless Networks
… In this thesis work I propose to the use smart antenna technology and a power management scheme in the wireless ad-hoc networks to increase the network capacity in terms of throughput, number of simultaneous communication and to lower the average transmit power and consequently co-channel …
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Resource Management In 3G Systems Employing Smart Antennas
… scheme tailored for a network that employs smart antennas in support of a heterogeneous user mix. Resource management in a wireless system should take care of channel impairments and non-ideal antenna patterns. Mobile users moving from one beam to the other give rise to resource reallocation …
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Link Establishment in Ad Hoc Networks Using Smart Antennas
… been designed for nodes using omni directional antennas. Through the use of directional antennas, it is possible to obtain higher efficiency. In this thesis we investigate the impact of these antennas on aggregate throughput and end-to-end delay. The use of omni-directional antennas not only …
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Feasibility of Smart Antennas for the Small Wireless Terminals
Smart antenna is a potential performance enhancement tool in a communications link that can be used at either end (transmitter or receiver) of the link in the form of beamforming or diversity operation. While receive smart antenna techniques and operations have matured over the years, transmit …
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Integrated broadband microphotonic beamformer for adaptive nulling in smart antennas
… signal rates for wireless communication systems. Smart antennas are the promising technology for improving the wireless communication systems performance. Smart antennas are system that consist of antenna arrays capable of adaptively adjusting the beam pattern, thereby enhancing the desired …
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Application of smart antennas to wideband code division multiple access : the uplink performance
… To establish the performance gain that a smart antenna can deliver in a 3G environment (i.e., with mixed traffic), the implementation of adaptive antenna arrays for the uplink of a Wideband Code Division Multiple Access (WCDMA) system in the Frequency Division Duplex (FDD) mode is …
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Smart Antennas at Handsets for the 3G Wideband CDMA Systems and Adaptive Low-Power Rake Combining Schemes
Smart antenna technology is a promising means to overcome signal impairments in wireless personal communications. When spatial signal processing achieved through smart antennas is combined with temporal signal processing, the space-time processing can mitigate interference and multipath to yield …
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On the Impact of MIMO Implementations on Cellular Networks: An Analytical Approach from a Systems Perspective
… array processing technique, also referred to as smart antennas, have received extensive attention in wireless communications due to their ability to combat multipath fading and co-channel interference, two major channel impairments that degrade system performance. However, when smart antennas are …
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Resource Management with Smart Antenna in CDMA Systems
… in addition to voice applications. The Smart antenna technique is one of the leading technologies that helps to meet the requirement by such services to radio network capacity. Resource management schemes such as power control, handoff and channel reservation/assignment are also …
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Implementation of Geometrically Based Single-Bounce Models for Simulation of Angle-of-Arrival of Multipath Delay Components in the Wireless Channel Simulation Tools, SMRCIM and SIRCIM
… of all aspects of wireless communications. Smart antennas and systems used in position location are among the most popular new studies that require signal information such as the amplitude, phase, and angle-of-arrival (AOA) of multipath delay spreads. For proper and efficient implementation …
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Improving the Performance of Wireless Systems via Selective Interference Nulling and Adaptive Medium Access Control Design
… wireless systems requires the confluence of smart communication methods, network protocols and ongoing advances in fabrication technologies, in order to bring smaller form factor mobile handsets to market. On par with these trends, this thesis focuses on two main areas, namely, Multiple …
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Deep-learning-based transport layer control for big data transmission over UAV swarming networks
Multi-Beam Smart Antennas (MBSAs) achieve concurrent communications in multiple beams, thereby providing higher throughput compared to regular directional antennas. Most of the transport layer control schemes used in MBSA-equipped networks are based on TCP, which are too conservative since they …
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Wideband Autonomous Cognitive Radios: Spectrum Awareness and PHY/MAC Decision Making
… advances in software-defined radios (SDRs), smart antennas, reconfigurable radio frequency (RF) front-ends, and full-duplex RF front-end architectures, to name a few. Generally, a CR is considered as a dynamically reconfigurable radio capable of adapting its operating parameters to the …
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Smart IP of QR decomposition for rapid prototyping on FPGAs
… such as MIMO detection, beam formation in smart antennas, and compressed sensing, all rely on quickly solving linear systems of equations. These applications of DSP have vastly different throughput, latency and area requirements, necessitating substantially different hardware solutions. The …
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Directional UAV swarming: a network perspective
… but fully explores the benefits of multi-beam antennas; We propose to adjust the parameters of the two MAC layers to support different mission priorities. In Chapter 3, we propose a throughput-optimal, heterogeneous (with both scheduled and random communications) medium access control (MAC) …
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On the Capacity Modelling in 3G Mobile Wireless Communications Systems
… capacity increase with the use of directional smart antennas to reduce the interference and therefore gain capacity increase. These are typically complex systems. One type that is simple enough yet beneficial in gaining capacity and coverage improvements in the WCDMA environment is called the …
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Cross-Layer Optimization: System Design and Simulation Methodologies
… for a MANET wherein the nodes are equipped with smart antennas. Traditional MAC protocols assume the use of omnidirectional antennas. Nodes with directional antennas are capable of transmitting in certain directions only and significantly reduce the chances of collision and increase the effective …
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Adaptive Arrays and Diversity Antenna Configurations for Handheld Wireless Communication Terminals
… indicate that signals received by the antennas in two-element handheld antenna arrays with spacing of 0.15 wavelength or greater can be combined to provide 7-9 dB diversity gain against fading at the 99% reliability level in non line-of-sight multipath channels. Thus, peer-to-peer …
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