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Full-Text Articles in Engineering

A Study Of Environment Noise In Ultra-Wideband Indoor Position Tracking, William Suski May 2012

A Study Of Environment Noise In Ultra-Wideband Indoor Position Tracking, William Suski

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This work is motivated by the problem of improving the accuracy of indoor ultra-wideband (UWB) position tracking through the study of the environment noise that affects such a system. Current systems can provide accuracy in the range of 30-100 cm in a small building, suitable for applications that require rough room-level precision such as asset tracking and surveillance. Our long-term goal is to improve the accuracy to 1 cm or better, expanding potential applications to telepresence, augmented reality, training and entertainment.
This work investigates the possibility of systematically observing the measurement noise of an UWB position tracking system and building …


New Algorithms For High-Throughput Decoding With Low-Density Parity-Check Codes Using Fixed-Point Simd Processors, Jawone Kennedy May 2012

New Algorithms For High-Throughput Decoding With Low-Density Parity-Check Codes Using Fixed-Point Simd Processors, Jawone Kennedy

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Most digital signal processors contain one or more functional units with a single-instruction, multiple-data architecture that supports saturating fixed-point arithmetic with two or more options for the arithmetic precision. The processors designed for the highest performance contain many such functional units connected through an on-chip network. The selection of the arithmetic precision provides a trade-off between the task-level throughput and the quality of the output of many signal-processing algorithms, and utilization of the interconnection network during execution of the algorithm introduces a latency that can also limit the algorithm's throughput.
In this dissertation, we consider the turbo-decoding message-passing algorithm for …


Extending Origami Technique To Fold Forming Of Sheet Metal Products, Ala Qattawi Jan 2012

Extending Origami Technique To Fold Forming Of Sheet Metal Products, Ala Qattawi

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This dissertation presents a scientific based approach for the analysis of folded sheet metal products. Such analysis initializes the examination in terms of topological exploration using set of graph modeling and traversal algorithms. The geometrical validity and optimization are followed by utilizing boundary representation and overlapping detection during a geometrical analysis stage, in this phase the optimization metrics are established to evaluate the unfolded sheet metal design in terms of its manufacturability and cost parameters, such as nesting efficiency, total welding cost, bend lines orientation, and maximum part extent, which aides in handling purposes. The proposed approach evaluates the design …