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 74 for “"Power Budget"”.
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Optimizing performance under thermal and power constraints for HPC data centers
Energy, power and resilience are the major challenges that the HPC community faces in moving to larger supercomputers. Data centers worldwide consumed energy equivalent to 235 billion kWh in 2010. A significant portion of that energy and power consumption is devoted to cooling. This thesis proposes …
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Detectivity vs. Sensitivity: Non-Hermitian Metasurface Sensor
… noise. But, when the probe is limited in its power budget, as in sensors on mobile platforms, high sensitivity does not guarantee high detectivity. Here, we demonstrate the trade-off between the detectivity and sensitivity of a plasmonic sensor. Plasmonic sensors are popular for their high …
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Design and analysis of artifact-resistive finger photoplethysmographic sensors for vital sign monitoring
… other is to minimize the consumption of battery power. An efficient double ring design is developed to lower the influence of external force, acceleration, and ambient light, and to hold the sensor gently and securely on the skin, so that the circulation at the finger may not be obstructed. To …
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0.3V biopotential sensor interface for stress monitoring
Miniaturized sensor nodes have a very tight power budget, especially in the case of implantables and health monitoring devices that require long operation lifetime. Exploiting low-voltage techniques in analog design can enable further power savings, which has not been explored much. However, for …
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Managing Many-Core Aging
Many-core scaling now faces a power wall. The gap between the number of cores that fit on a die and the number that can operate simultaneously under the power budget is rapidly increasing with technology scaling. In future designs, the majority of the cores will necessarily have to be dormant at …
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A new compound modulation technique for multi-channel analog video transmission on fiber
… (OMD) that may be used. This, in turn limits the power budget achievable, signal-to-noise ratio, and the channel capacity. In this dissertation a new analog transmission technique for multi-channel TV transmission on fiber USIng frequency modulation/pulse amplitude modulation/time division …
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Modeling and Runtime Systems for Coordinated Power-Performance Management
… expect maximal efficiency to achieve the goal of power budget under 20-40 megawatts for 1 exaflop set by the Department of Energy. To optimize efficiency, emergent systems provide multiple power-performance control techniques to throttle different system components and scale of concurrency. In …
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Multilayer Techniques to Address Parameter Variation
… (CMP) to differ substantially in both static power consumed and maximum frequency supported. In this environment, ignoring variation effects when scheduling applications or when managing power with Dynamic Voltage and Frequency Scaling (DVFS) is suboptimal. This thesis presents a set of …
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Sum-rate optimal network beamforming and power allocation for single-carrier asynchronous bidirectional relay network
… of sum-rate maximization, under a total transmit power budget, for an asynchronous single-carrier bidirectional (two-way) network. The network consists of two single-antenna transceivers which wish to exchange information with the help of multiple single-antenna amplify-and-forward (AF) relays. We …
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Jointly optimal pre- and post-channel equalization and distributed beamforming in asynchronous bi-directional relay networks
… transceivers is minimized under a total transmit power budget by optimally obtaining the transceivers’ powers and relay beamforming weight vectors as well as pre- and post-channel equalizers at the two transceivers. We prove that our proposed approach results in a certain relay selection scheme.
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Signal conditioning for high efficiency : wireless transmission
… of wireless basestations will also need to be powered from renewable sources, particularly in developing countries. A new generation of components, circuits, algorithms and transmission structures will therefore be required to meet the wider bandwidth and the lower energy requirements. This …
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A Microgrid Architecture With Multiple-Input DC/DC Converters: Applications, Reliability, System Operation, and Control
… control are analyzed. Multiple-input converter power budget equations are derived and verified through simulations and experiments. Issues in distributed architectures, such as autonomous control, and fault detection and mitigation are also addressed. An autonomous control strategy that relies …
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Ultra-low energy electronics for synthetic biological sensors
… work explores the "functionalization" of low-power low-cost microelectronics with equally inexpensive genetically engineered whole-cell microbial sensors to aid in sensing the chemical domain. The driving application is an ingestible sensor for bleeding detection in the gastrointestinal tract. …
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Very High Speed Coherent Passive Optical Networks
… ended photodiode. For further improvement of the power budget, linear and non-linear pre-distortion techniques are in- vestigated. The solution with the balanced photodiode exceeds the E1 class power budget requirement (>33 dB), whereas the single ended photodiode solution meets the N1 class …
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Broadband RF Power Amplifier Design Methodology Using Sequential Harmonic Characterization
Radio Frequency Power Amplifier (RFPA) amplifies the communication signals to the required power level for transmission. It is the most power consuming stage in a transceiver chain; consequently, any improvement in terms of dissipated power and efficiency of the power amplifier affects the overall …
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Efficient Deep Learning with Sparsity: Algorithms, Systems, and Applications
… delivers increasing performance within the same power budget. In this dissertation, we present our solutions across the algorithm, system, and application stacks to address the demand-supply gap through the lens of sparsity. In Part I, we first develop algorithms, SparseViT and SparseRefine, …
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Integration, implementation and testing of the X-Band SASAR II system
… parameters for monitoring and testing are the power budget levels for each RF unit. An insufficient input drive for a mixer may result in a null output. Conversely a high input drive will result in the saturation of the device and the generation of intermodulation products and higher conversion …
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Energy-efficient wireline transceivers
Power-efficient wireline transceivers are highly demanded by many applications in high performance computation and communication systems. Apart from transferring a wide range of data rates to satisfy the interconnect bandwidth requirement, the transceivers have very tight power budget and are …
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Cooperative relay beamforming design for multi-cluster relay interference networks
… (SINR) at destinations subject to the relay power budget within each cluster. Both single and multiple source-destination (S-D) pair scenarios are considered. We propose a beam matrix structured as a weighted sum of two types of beam matrices: zero forcing (ZF) beam matrix for inter-cluster …
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Design of low-power permanent-magnet synchronous motor for use in high-density heat pump
… a tight upper bound of 33.3 W on available power. Electrical characteristics are modeled and tested to determine optimal phase-excitation waveforms. Finally, power electronics with a sensorless control scheme are designed and incorporated using a custom-designed printed circuit board at an …
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