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.
Results
Showing 1 to 20 of 40 for “"channel measurements"”.
-
Multiple input multiple output channel measurements and system performance
… and deployed, a database of typical propagation measurements is required to confirm theoretical predictions with reality. The design, development and use of specialised measurement equipment to accurately establish an indoor MIMO measurement database is presented in this thesis.
-
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 …
-
Radio Channel Measurements and Modeling for Smart Antenna Array Systems Using a Software Radio Receiver
… 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 was used to perform vector channel measurements in terrestrial and air-to-ground environments …
-
VT-STAR design and implementation of a test bed for differential space-time block coding and MIMO channel measurements
… systems use single-input multiple-output (SIMO) channel in the reverse link, meaning one transmit antenna at the user terminal and multiple receive antennas at the base station. Recently, information theoretic research has shown an enormous potential growth in the capacity of wireless systems by …
-
Feasibility of Smart Antennas for the Small Wireless Terminals
… in both flat fading and frequency selective channels. Practical issues, i.e., latency and amount of feedback, related to transmit smart antenna operation are discussed. Various channel measurements are presented to assess the performance of a transmit smart antenna in a real propagation …
-
Integral Identities for Passive Systems and Spherical Waves in Scattering and Antenna Problems
… crucial parts in spherical near-field antenna measurements, and have been used recently to model antenna-channel interaction and multiple-input multiple-output (MIMO) communication systems. This thesis is also the first to present a method to estimate spherical wave coefficients from …
-
Compressive cooperative obstacle mapping with see-through capabilities in mobile networks
… the map based on a small number of wireless channel measurements. This allows the robots to efficiently map occluded areas of the workspace. By using the recent results in the area of compressive sensing, we exploit the sparse representation of the map in space, wavelet or spatial variations, …
-
Studies in deep inelastic scattering and vector meson photoproduction
… W was detected via its decay into the pi+pi-pi0 channel. Measurements of the energy, nanentum transfer, and angular dependence of the cross section have been maCle for photon energies between 6~ and 225 GeV.
-
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 …
-
Wideband Channel Characterization for MIMO Scenario
… broadband wireless systems benefit from accurate channel characterization, there is growing interest in broadband wireless multiple-input multiple-output (MIMO) channel models. This thesis verifies the suitability of the Saleh Valenzuela with Angle (SVA) model for wideband MIMO communication …
-
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 …
-
An experimental investigation of the turbulent flow in a closed compound channel
… in a closed, symmetric, smooth-wall compound channel. Measurements were made across one quadrant of the cross-section since the flow was assumed symmetric. Measurements were made for a single channel Reynolds number. All mean velocity components were calculated and are reported. The mean …
-
Measurement of the partial cross-sections sigmaTT, sigmaLT and sigmaT + epsilon-sigmaL of the p(e,e'pion+)n reaction at the Delta(1232) resonance
… detection in two sequential sets of simultaneous measurements. The sigmaLT partial cross section is sensitive to the coulombic quadrupole amplitude C2, and can be used to extract the ratio (CMR) of C2 to the dominant magnetic dipole (M1) amplitude, and sigmaTT is similarly sensitive to the …
-
A statistical ultra wideband indoor channel model and the effects of antenna directivity on multipath delay spread and path loss in ultra wideband indoor channels
Ultra-wideband (UWB) indoor frequency domain channel measurements have been performed in the 2 GHz to 6 GHz frequency band using three different transmitter/receiver (Tx/Rx) antenna combination pairs. The effects of antenna directivity on path loss and multipath propagation in the channel were …
-
Antenna Selection And MIMO Capacity Estimation For Vehicular Communication Systems
… link for vehicular communication extensive channel modeling and measurements are required. In this thesis a novel cost-effective implementation of vehicular channel capacity measuring system using off-the-shelf devices is proposed. Then using the proposed system, various channel measurements …
-
Hardware Security with Electromagnetic Side Channels
… the design process. Particularly, physical side channels that allow reverse engineering of inputs, operation states, and private information must be characterized and protected against. In this thesis, we focus on electromagnetic (EM) physical side channels. EM side channel measurements using a …
-
Design, Fabrication, and Validation of Membrane-Based Sensors
… bilayers within the sealed device. Capacitance measurements of the encapsulated bilayer show that the sealing cap slightly compresses the bottom insert and reduces the size of the enclosed bilayer. Single channel measurements of alamethicin peptides further verify that the encapsulated device …
-
Measurement of the Anomalous Magnetic Moment of Tau Lepton with CMS Experiments and Improvements to the Zero Degree Calorimeters at CMS
… of the Large Electron-Positron Collider. Measurements of the anomalous magnetic moment of leptons have recently gained interest owing to the tension between experimental measurements of the anomalous magnetic moment of muons am at the Muon g-2 experiment [1] and Standard Model predictions …
-
Analysis of ion channels with hidden Markov models : parameter identifiability and the problem of time interval omission
… situated in the cell membrane. These ion channels open and close randomly and control the flux of ions into and out of the cell. With the study of the current through individual ion channels it is possible to deepen the understanding of the structure of the protein. <br>In addition, the …
-
A Simulator for analyzing the throughput of IEEE 802.11b Wireless LAN Systems
… The campaign was conducted in two different channel conditions, office space and open hall. The channel measurements were also performed at these locations to understand the multipath. Comparative studies indicate that the choice of the rate adaptation algorithm hugely influences the …
Page 1 of 2