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 11 of 11 for “"Channel Prediction"”.
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Microcellular radio channel prediction using ray tracing
… a known impulse response is replaced by a radio channel with an impulse response that is constantly changing as the users roam throughout the coverage area. The varying impulse response is due to the multiple path propagation of the signals from the transmitter to the receiver. The design of …
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Channel Prediction for Adaptive Modulation in Wireless Communications
… enhancement made possible by using linear prediction along with channel estimation in conjunction with adaptive modulation. We begin this manuscript with basic fundamentals of our study, followed by a detailed view of simulations, their results, and our conclusions from them. The study …
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Channel prediction and adaptation over satellite channels with weather-induced impairments
… data throughputs. Efficiency improvements using channel prediction and adaptation over satellite channels with weather-induced impairments are considered in this thesis. First, we consider scintillation and rain attenuation as two dominant factors for signal fading over satellite-earth paths …
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Dynamic Code Selection Method for Content Transfer in Deep Space Network
… codes and turbo codes together with a real-time channel prediction model to maximize file transfer from space vehicles to the Earth stations. While turbo codes are used to correct channel errors, RaptorQ codes are applied to eliminate the need for negative-acknowledgment of the loss of any …
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Distributed power control (DPC) based energy efficient protocols for wireless networks
… for wireless networks in the presence of fading channels while satisfying network constraints and user defined QoS requirements"--Abstract, page iv.
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Radio Resource Management Optimization For Next Generation Wireless Networks
… traffic, and the stochastic nature of wireless channels. These limitations are further tightened as the provider’s commitment to high quality-of-service (QoS) levels especially data rate, delay and delay jitter besides the system’s spectral and energy efficiencies. In this dissertation, we …
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Channel modeling and resource allocation in OFDM systems
… to broadband communication systems. The radio channel is plagued by multipath propagation, which causes frequency-selective fading in broadband signals. Orthogonal Frequency-Division Multiplexing (OFDM) is a modulation scheme specifically designed to facilitate high-speed data transmission over …
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Satellite Channel State Prediction based on Fade Slope and Artificial Intelligence (AI) Algorithms
… bands. For these techniques to work, adequate channel prediction is essential. This involves generating a better predictive approach of rain attenuation, to have a reliable knowledge of the transmission channel, and hence, adaptively optimise the signal to protect against link outages, to …
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Optimization of Spectrum Allocation in Cognitive Radio and Dynamic Spectrum Access Networks
… cognitive radio networks (CRNs) is intelligent channel allocation which will improve the performance of the network and spectrum utilization. The objective of this dissertation is to address the channel allocation optimization problem in cognitive radio and DSA networks under both centralized …
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Joint Positioning and Multipath Radio Channel Estimation and Prediction
… the topic of joint positioning and radio channel estimation and prediction. Both positioning and radio channel estimation have a long history of research with many publications but the combination of the two has so far at large been left unexplored. The reason for studying this topic is …
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Closed-loop multiple antenna aided wireless communications using limited feedback
… some information about the time-varying wireless channel using a limited number of bits. Furthermore, the transmitter then pre-processes the signals to be transmitted according to the received feedback information. This closed-loop multiple antenna<br/>aided communication scheme is capable of …