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 13 of 13 for “"channel measurement"”.
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Subband Stitching for D-Band Measurements
… of future systems. As part of this research, channel measurement campaigns are being conducted to characterize the channel over wide ranges of frequencies. In this thesis, we explore how a technique known as subband stitching can be combined with an existing channel measurement procedure in …
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Evaluation of Joint AOA and DOA Estimation Algorithms Using the Antenna Array Systems
… algorithms can provide high resolution DSP-based channel measurement using low bandwidth hardware.
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Iterative receivers with channel estimation for MIMO and multi-user OFDM systems
… and developed iterative receivers with channel estimation for multi-user systems. Paper I investigates different iterative receiver algorithms for an uplink multi-user MIMO orthogonal frequency division multiplex (OFDM) system. For the given receiver structure, different combinations of …
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Measurement Based Channel Characterization and Modeling for Vehicle-to-Vehicle Communications
… rely upon the properties of the propagation channel. Therefore, understanding the properties of the propagation channel becomes extremely important. This thesis aims to fill some gaps of knowledge in V2V channel research by addressing four different topics. The first topic is channel …
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Advances in tunable diode laser spectroscopy for aero engine research
… (TDLS) is a widely used technique for the measurement of gas species and offers in-situ operation, accuracy and faster response time compared to other optical and non-optical gas sensing techniques.The work in this thesis focusses on the measurement of CO2 in the harsh environment of a gas …
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Radio Channel Measurements and Modeling for Smart Antenna Array Systems Using a Software Radio Receiver
… performed in the areas of radio wave propagation measurement and modeling, smart antenna arrays, and software-defined radio development. A four-channel, wideband, software-defined receiver was developed to serve as a test bed for wideband measurements and antenna array experiments. This receiver …
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3.5 GHz Indoor Propagation Modeling and Channel Characterization
… shortage of propagation data and accurate channel modeling at 3.5 GHz in indoor environments. These models are necessary for cellular coverage planning and evaluating the performance and feasibility of wireless systems. This report presents the results of a fixed wireless channel …
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A Physical Hash for Preventing and Detecting Cyber-Physical Attacks in Additive Manufacturing Systems
… to the manufactured part via a disconnected side-channel measurement system. The disconnection ensures that if the network and/or AM system become compromised, the manufacturer can still rely on the measurement system for attack detection. The physical hash takes the form of a QR code that …
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Timing offset and quantization error trade-off in interleaved multi-channel measurements
… with equal quantization granularity in each channel and uniform sampling offsets. Recent work suggests that it is often possible to achieve a better signal-to-quantization noise ratio (SQNR) with different quantization granularity in each channel, non-uniform sampling, and appropriate …
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Wireless local area radio networks wideband characterisation and measurements at 62.4GHz
… systems using new high-resolution wideband channel measurement data. Based on this data, spatial and temporal statistics of several line-of-sight radio paths in a University campus are presented and analysed. In order to enable measurement of the wideband propagation characteristics a …
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Machine Learning for Millimeter Wave Wireless Systems: Network Design and Optimization
… of mmWave yields severe path loss and high channel uncertainty. Meanwhile, using a large number of antenna elements requires a high energy consumption and heavy communication overhead for MIMO transmissions and channel measurement. To facilitate efficient mmWave communications, in this …
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Multiple Antenna Terminals in Realistic Environments - A Composite Channel Modeling Approach
… wireless communication systems we need physical channel models that take into account also the directional domain of the propagation channel. In this thesis we investigate, validate and propose a practical approach to wireless channel modeling and, particularly, to mobile communication systems. …
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Long polyphase sequences for adaptive mmse detector in asynchronous cdma plc network with impulsive noise
… have a good understanding of the communication channel characteristics; in particular, the range of channel frequency response, and the characteristics of the channel noise. In this thesis, a powerline channel model is proposed, which takes into account the noise generated in the network as well …