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 249 for “"Multiple input multiple output"”.
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Different Multiple Input Multiple Output Systems
The use of multiple antennas at the transmitter as well as at the receiver can greatly improve the capacity of a wireless link when operating in a rich scattering environment. In such an arrangement all transmitting antennas radiate in the same frequency band so the overall spectral efciency …
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Complexity reduction in multiple input multiple output algorithms
… of wireless systems to solve the problem. Multiple Input Multiple Output (MIMO) is one solution that employs multiple antennas at the transmitter and receiver. The MIMO algorithms are usually highly complex and computationally intensive. This results in increased power consumption and …
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Multiple input multiple output channel measurements and system performance
… conventional systems, a concept referred to as Multiple-Input Multiple-Output or MIMO not only thrives under multipath conditions but also has the potential to allow for substantial increases in capacity. MIMO systems use a combination of multiple antenna arrays at the transmitter and receiver …
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Cycle-to-cycle control of multiple input-multiple output manufacturing processes
… due to changes in the target value or to output disturbances. Both types are methods for using feedback to improve product quality for processes that are inaccessible within a single processing cycle but can be changed between cycles. Through rigorous redevelopment of the control …
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Machine Learning-Based Receiver in Multiple Input Multiple Output Communications Systems
Bridging machine learning technologies to multiple-input-multiple-output (MIMO) communications systems is a primary driving force for next-generation wireless systems. This dissertation introduces a variety of neural network structures for symbol detection/equalization tasks in MIMO systems …
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Transmission Strategies for Wireless Multi-user, Multiple-Input, Multiple-Output Communication Channels
Multiple-Input, Multiple-Output (MIMO) processing techniques for wireless communication are of interest for next-generation systems because of their potential to dramatically improve capacity in some propagation environments. When used in applications such as wireless LAN and cellular telephony, …
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Guessing Random Additive Noise Decoding in Coded Multiple-Input Multiple-Output Systems
Multiple-Input Multiple-Output (MIMO) wireless communication systems incorporate forward error correction (FEC) to achieve high reliability under fading and interference. In this thesis, we explore the emerging FEC paradigm of Guessing Random Additive Noise Decoding (GRAND) in a point-to-point MIMO …
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PLAYBACK BUFFERING AND CONTROL FOR LINEAR MULTIPLE INPUT MULTIPLE OUTPUT NETWORK CONTROL SYSTEMS
… the previous work, which considered only single input single output (SISO) systems, our model is generalized for multiple input multiple output (MIMO) systems. We simulate our control scheme on owd and rtt data collected by three different methods. We define our own performance index and …
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Multiple-input multiple-output visible light communication receivers for high data-rate mobile applications
… capacity from mobile devices, we investigate multiple-input multiple-output (MIMO) VLC to achieve multiplexing capacity gains and to allow multiple users to simultaneously transmit without disrupting each other. Previous approaches to receive VLC signals have either been unable to …
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Design, Fabrication, and Measurement of a Multiple-Input Multiple-Output (MIMO) Antenna for Mobile Communication
… Characterization of the MIMO antenna included input impedance, scattering parameters and radiation pattern cross sections that were all measured from 500-6500 MHz inside an anechoic chamber. The measurement results indicated four main operating regions of the multiband antenna centered at 875 …
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Unified approach for optimisation of single-user and multi-user multiple-input multiple-output wireless systems
Mehrantennensysteme werden in zuküunftigen Mobilfunksystemen der dritten und vierten Generation eingesetzt werden, um die spektrale Effizienz, die Zuverlässigkeit und die Qualität der drahtlosen Übertragung zu verbessern. In der Theorie wurde bewiesen, dass die Kanalkapazität dieser …
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Confidence bands, measurement noise, and multiple input - multiple output measurements using three-channel frequency response function estimator
… to extend the three-channel FRF estimator to multiple input-multiple output measurements are developed and verified through simulations.
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Measurement System and Campaign for Characterizing the Theoretical Capacity and Cross-Correlation of Multiple-Input Multiple Output Indoor Wireless Channels
… techniques use diversity concepts to resolve multiple independent streams of data and increase the potential data-rate. This new space-time research investigates the unprecedented ability to simultaneously transmit separate data streams from many closely-spaced antennas on a common carrier …
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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
This work concentrates on the application of diversity techniques and space time block coding for future mobile wireless communications. The initial system analysis employs a space-time coded OFDM transmitter over a multipath Rayleigh channel, and a receiver which uses a selection combining …
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Advanced MIMO-OFDM technique for future high speed braodband wireless communications. A study of OFDM design, using wavelet transform, fractional fourier transform, fast fourier transform, doppler effect, space-time coding for multiple input, multiple output wireless communications systems
This work concentrates on the application of diversity techniques and space time block coding for future high speed mobile wireless communications on multicarrier systems. At first, alternative multicarrier kernels robust for high speed doubly-selective fading channel are sought. They include the …
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Outage probability at finite SNR
… reduce the outage probability of a single user multiple input multiple output (MIMO) channel when a sub-optimal transceiver architecture is used. We show that in slow-fading scenarios, the outage probability can be improved by using unitary rotations combined with coding. We provide analysis and …
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Optimal adaptive control with ΘLQG
… (locally optimal) nonlinear adaptive control on multiple-input multiple-output systems. This approach can be used to stabilize an under-actuated under-observed nonlinear dynamic system with noisy measurements while simultaneously identifying system parameters. It requires a parameterized dynamic …
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Transmit antenna selection in fading wireless communication systems
To address the drawbacks associated with multiple-input multiple-output (MIMO) systems, we propose the use of the transmit antenna selection technique. In transmit antenna selection, the best performing antenna(s) is selected from all the available transmit antennas for transmission. Transmit …
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Some Information Theoretic Aspects of Reliable Communication With Transmitter Side Information
… of determining the capacity region of the multiple-input-multiple-output (MIMO) Gaussian broadcast channel. Our main result is a new extremal inequality as the underpinning mathematical structure for the MIMO Gaussian broadcast channel problem. In one special case, this inequality yields a …
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