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 16 of 16 for “"Multiple-Input and Multiple Output"”.
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Advanced Multiple-Input and Multiple Output Technology in Wireless Communication Networks
Nowadays, the explosive data traffic demand has been craving innovative technologies for future wireless networks. Classic theory has revealed that the capacity of a multiple-input and multiple-output (MIMO) channel can increase linearly with the number of antennas. However, besides deploying …
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Advanced Orthogonal Frequency-Division Multiplexing Systems with Cyclic Prefix-Less Multiple-Input and Multiple-Output Discrete Fourier Transform Spreading and Unmanned Aerial Vehicles-Assisted Cyclic Postfixed Windowed Schemes
… of the time domain Orthogonal Frequency-Division Multiplexing (OFDM)/Cyclic Prefix (CP)-less OFDM signal and reduction of baseband signal Out-of-Band (OOB) spectral power in the vicinity of boundaries of the transmission frequency band is very much essential. In the perspective of considering the …
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Communication strategies for the MIMO interference channel
… networks is crucial for meeting future demand for higher mobile data rates. Interference can be viewed through the interference channel (IC) in which pairs of transmitters and receivers interfere with each other, so an interesting way to manage interference is to develop communication …
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Combined Space-Time Diversity and Interference Cancellation for MIMO Wireless Systems
… is increasing interest in the exploitation of multiple-input and multiple-output (MIMO) channels to enhance the capacity of wireless systems. In this study, we develop and evaluate a channel model, evaluate the corresponding channel capacity, and design and analyze a simple orthogonal transmit …
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Efficient signal, code, and receiver designs for MIMO communication systems
The so-called diversity-multiplexing tradeoff characterizes the fundamental interaction between the robustness and capacity gains obtainable from multiple-input and multiple-output (MIMO) systems in fading environments. This thesis develops practical schemes for approaching the optimal tradeoff in …
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Feasibility of Smart Antennas for the Small Wireless Terminals
… While receive smart antenna techniques and operations have matured over the years, transmit smart antenna is relatively a new concept that has seen its growth over the past few years. Both these smart antenna operations have been traditionally designed for base station applications. But …
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Resource management of cognitive radio networks with optimization methods.
… radio transceiver senses its environment and dynamically adapts its transmission methods and the channel usage so that the induced interference to the licensed user is regulated. The dissertation focuses on solving three kinds of problems of the cognitive radio networks: (1) Multiple-input …
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Time varying channel models for 5G mobile communication systems
… efforts by providing further fundamental understanding of time varying channels in 5G mobile communication systems and overcome the obstacle. First, we reopen the door of research in the field of time varying communication channels. The door has almost been closed before by a well-accepted …
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Capacity-approaching data transmission in MIMO broadcast channels
… transmission schemes at the physical layer and scheduling algorithms at the medium access control (MAC) layer from a sum-capacity perspective. Various roles of multiple antennas are studied under channel-aware scheduling, including diversity, beamforming and spatial multiplexing. At a system …
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Multi-beam Antenna Arrays for Base Stations in Cellular Communication Systems
… systems such as the fifth generation (5G) and sixth generation cellular systems. There will also be a shift to higher frequencies where more spectrum is available to accommodate wide-band high data rate systems. These factors will cause shifts in the technologies used in implementing …
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Evaluating the effectiveness of Cooperative/Coordinated Multipoint (CoMP) LTE feature in uplink and downlink transmissions
… Equipment (UE). However, because of regulatory and radiation restrictions as well as operational costs, signal power may only be increased only up to a certain limit to reduce the interference. The other common radio propagation impairment is multipath. Multipath refers to a scenario where …
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Control System Design for a Solar Receiver-Reactor
… for use in both electrical power generation and materials processing industries. However, there is still substantial work needed to commercialise the technology and a key facet to this is the design of suitable control systems. The objective of this thesis was to describe a control system …
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Inter-cell interference coordination in 5G ultra-dense networks
The exponentially increasing demand for mobile broadband communications has led to the dense deployment of cellular networks with aggressive frequency reuse patterns. The future Fifth Generation (5G) networks are expected to overcome capacity and throughput challenges by adopting a multi-tier …
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Improving Throughput and Efficiency for WLAN: Sounding, Grouping, Scheduling
… significant improvement of both WLAN throughput and efficiency. To increase throughput, multiple-input and multiple-output (MU-MIMO) has been adopted in the new generation of WLAN, such as IEEE 802.11ac. MU-MIMO systems exploit the spatial separation of users to increase the network throughput. …
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Synchrophasor Sensing and Processing Based Smart Grid Security Assessment for Renewable Energy Integration
<p>With the evolution of energy and power systems, the emerging Smart Grid (SG) is mainly featured by distributed renewable energy generations, demand-response control and huge amount of heterogeneous data sources. Widely distributed synchrophasor sensors, such as phasor measurement units (PMUs) …
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Algorithms and Optimization for Wireless Networks
… of wireless networks have emerged for both civil and military applications, such as wireless sensor networks, ad hoc networks, among others. To improve the performance of these wireless networks, many advanced communication techniques have been developed at the physical layer. For both theoretical …