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 97 for “"rate performance"”.
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Analytical Modeling and Diagnosis of Penetration Rate Performance of PDC Bits
… of drilling deep (15000+ ft) wells, due to slow rate of penetration (ROP) at depth, has severely limited the utilization and economic significance of deep hydrocarbon resources. The overall objective of this study was to obtain a better understanding of the major cause(s) of slow ROP in deep …
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Exchange rate regime and exchange rate performance: evidence from East Asia
… on in the international community of exchange rate regime, monetary policy and related core issues in East Asian economies. From different angles and aspects, this thesis contributes to the related literature, and provides fresh theoretical arguments and comprehensive study on the exchange rate …
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Microstructural effects on capacity-rate performance of vanadium oxide cathodes in lithium-ion batteries
… grain size distribution affects the capacity-rate performance in lithium-ion batteries. Vanadium oxide thin films were prepared by sputtering onto ITO-coated glass substrates and crystallized in a refined annealing process to generate diverse microstructures. Average grain size and grain size …
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Error rate performance analysis of stream and block ciphers in a digital mobile communication channel.
… the effect of encrypting data on the bit error rate at the receiver. Block and stream cipher modes based on the Data Encryption Standard (DES) are examined. More specifically, Electronic Code Book (ECB), Cipher Block Chaining (CBC), Output FeedBack (OFB) and Cipher FeedBack (CFB) modes are …
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The role of phase transformation in the rate performance limited Lix̳ V₂ O₅ battery cathode
It has recently been reported that the rate performance of Lix̳ V₂O₅, a widely studied candidate Li-ion battery cathode material, can be significantly improved through a variety of particle size reduction techniques, (e.g. nano templating). It is widely believed that the microscale mechanism …
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Characterization of The Count Rate Performance and Evaluation of The Effects of High Count Rates On Modern Gamma Cameras
<p>CHARACTERIZATION OF THE COUNT RATE PERFORMANCE AND EVALUATION OF THE EFFECTS OF HIGH COUNT RATES ON MODERN GAMMA CAMERAS<strong></strong></p> <p>Michael Stephen Silosky, B.S.</p> <p>Supervisory Professor: S. Cheenu Kappadath, Ph.D.</p> <p>Evaluation of count rate performance (CRP) is an integral …
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Enhancing the bit error rate performance of ultra wideband systems using time-hopping pulse position modulation in multiple access environments
… choosing a suitable modulation technique. Data rate, transceiver complexity, and BER performance of the transmitted signal are all related to the employed modulation scheme. Several classical modulation schemes can be used to create UWB signals, some are more efficient than others. These schemes …
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Sphere detection and LDPC decoding algorithms and architectures for wireless systems
Ever increasing demand for high data rate wireless transmissions with high spectral efficiency leads to utilization of communication systems with multiple transmit and receive antennas. In addition, excellent error-rate performance can be achieved with iterative receiver structure composed of inner …
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NEW EDGE DETECTORS FOR CODED MARK INVERSION TRANSMISSION WITH ENHANCED PERFORMANCE
… the analysis and measurement of the bit error rate performance of edge detectors for Coded Mark Inversion (CMI) data transmission. Chapter 1 gives the introduction to the CMI data transmission system, the motivation and the goal of the study are presented. Chapter 2 presents a general …
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Space-Time Coding with Offset Modulations
… can be detected with near optimal bit error rate performance using a common detector that is formulated as either an XTCQM detector, a traditional CPM detector, or a pulse amplitude modulation (PAM) detector (due to the PAM decomposition of the CPM representations of these modulations). In …
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Advanced Multiple-Input and Multiple Output Technology in Wireless Communication Networks
… the proposed scheme achieves the optimal error rate performance at high SNRs. Numerical results show that the proposed scheme significantly outperforms existing schemes. Second, a new caching scheme is proposed for a random wireless device to-device (D2D) network, where each node is equipped with …
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Decentralized Baseband Processing for Massive MU-MIMO Systems
… with hundreds or thousands of antennas and generates raw baseband data rates that exceed the limits of current interconnect technology and chip I/O interfaces. This thesis proposes novel decentralized baseband processing architectures that alleviate these bottlenecks by partitioning the BS …
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Advancements in Radar Sensing and Communications through Reconfigurable Intelligent Surfaces
… it examines the joint enhancement of sum-rate performance and target detection capabilities in integrated sensing and communication (ISAC) frameworks. Both conventional diagonal RIS configurations and the recently proposed beyond diagonal RIS architecture are employed in this study.
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Bank Market Concentration, Advertising Intensity, Price-Cost Margins, and Costs of Production: An Empirical Approach
… local bank market concentration and interest rate performance measures has been established, but the systematic influence of market structure on costs of production, advertising intensity, and profit margins has received little attention. The purpose of this study is to extend the …
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Comparison of quadrature detector and phase-locked loop demodulator performance with LEOSAT applications
… efficiency. This thesis compares the error rate performance of CPFSK demodulation using quadrature detectors and phase-locked loops under varying carrier to noise ratios and simulated Doppler shifts, as might be expected for a low earth orbit satellite downlink. Experimental comparison …
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Performance of GMSK and 7/4-DQPSK Modulations in Land Mobile Radio Channels
… predetection filter bandwidth on the bit error rate performance of GMSK with one-bit differential detection in this environment has been analyzed. The bit error rate performance of GMSK with two-bit differential detection has also been analyzed. Numerical computation is used to obtain GMSK bit …
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Designing materials for energy storage with high power and energy density : LiFePO₄ cathode material
… vehicles, except high power capability. Strategies to increase the rather sluggish rate performance of bulk LiFePO₄ have focused on improving electron transport in the bulk or at the surface of the material, or on reducing the path length over which the electron and Li* have to move by …
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100 Gbps ptical coherent modem for low earth orbit optical inter-satellite links
… Several FSOC systems successfully demonstrated links between spacecraft and Earth ground stations as well as inter-satellite links. Commercial industry, including companies such as SpaceX and Telesat, have taken an interest in utilizing the benefits of FSOC for proposed LEO constellations …
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Lattice reduction for MIMO detection: from theoretical analysis to hardware realization
… stems from the need to improve the bit-error-rate performance of conventional, low-complexity detectors while simultaneously exhibiting considerably reduced complexity when compared to the optimal method, maximum likelihood detection. Specifically, we first develop an understanding of the …
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Simulation and Estimation Techniques for Wideband High-Frequency Communication Channels
… model is validated by analyzing the bit-error-rate performance of WBHF communication systems operating over the channels. The strengths and limitations of each model are also discussed. Finally, a channel estimation scheme, based on an autoregressive (AR) model for the channel multipath …
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