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 9 of 9 for “"Channel feedback"”.
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Space -Time Transmit Precoding and Interference Suppression for a Wireless Downlink
… filters for a multiuser system, assuming perfect channel feedback. The filter design is formulated as an optimization problem, and an iterative algorithm that converges to the global optimum is derived. Next, the effect of imperfections in the channel feedback is investigated, focusing on a single …
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Channel state quantization in MIMO broadcast systems : architectures and codes
… system design with an emphasis on the role that channel feedback plays in a network setting. We develop new design principles for channel feedback design in such systems and show that the system designer is afforded extra degrees of freedom in the choice of the channel quantizer due to the …
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Active structural acoustic control smart panel with small scale proof mass actuators
… presents a comprehensive study of decentralised feedback control on a smart panel with electrodynamic proof mass actuators and velocity sensors at their footprints. The aim is to provide guidance for the design of light, simple, robust and low cost, control units which can be attached in large …
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Control and Communication with Signal-to-Noise Ratio Constraints
… communication over an additive white noise channel with a signal-to-noise ratio (SNR) constraint. The first problem concerns the transmission of a real-valued signal from a partially observed Markov source. The distortion criterion is the mean squared error and the transmission is subject to …
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Feedback schemes in angular domain processing for MIMO antenna systems
… multiplexing of multiple data streams onto the channel and an increase in the channel’s capacity or improved reliability against multipath fading. An MIMO antenna system with Nt transmit antennas and Nr receive antennas, under suitable fading conditions will yield a min(Nt,Nr) degree of freedom …
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A Ray-Based Investigation of the Statistical Characteristics and Efficient Representation of Multi-Antenna Communication Channels
… methods predict the behavior of wireless channels using a model of the propagation environment and are a low-cost alternative to direct measurements. We use ray tracing simulations to validate the statistical time and angle of arrival characteristics of an indoor multipath channel and …
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Optimizing Wireless Network Throughput: Methods and Applications
… the adverse nature of the wireless propagation channels, engineers have been able to invent various clever techniques, i.e. Multiple Input Multiple Output (MIMO) technology, spread spectrum communications, Orthogonal Frequency Division Multiplexing (OFDM) to name a few, to achieve fast and …
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Interpretation of Learned Solutions for Precoding-Oriented Massive MIMO CSI Feedback Design
The development of effective channel feedback strategies is crucial for enabling the widespread adoption of Frequency Division Duplexing in Massive MIMO systems. While conventional methods rely on Compressed Sensing or Codebook-based techniques, Deep Learning has recently emerged as a powerful …
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MSE-based Linear Transceiver Designs for Multiuser MIMO Wireless Communications
… consider the design of transceivers assuming channel state information (CSI) at the transmitter. We consider minimization of the sum-MSE over all users subject to a sum power constraint on each transmission. Using MSE duality, we solve a computationally simpler convex problem in a virtual …