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 3 of 3 for “"Stochastic Parallel Gradient Descent"”.
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Low-Cost Spatial Light Modulator for Applications in Free-Space Optical Communication
… and (2) sensorless correction enabled by the Stochastic Parallel Gradient Descent (SPGD) algorithm. A second-hand Mitsubishi XL8U projector is disassembled to extract its LC panel and characterized. The characterization is performed by Jones matrices and a Mach-Zehnder interferometer (MZI) to …
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Sensorless Wavefront Correction Algorithms for Free-Space Optical Communications
… wavefront correction algorithms, such as stochastic parallel gradient descent (SPGD), are preferable in terms of cost and SWaP, and have been used in FSOC terminals as methods to optimize the received signal strength indicator (RSSI). A key challenge with such algorithms, however, is that …
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Phasing of Ground-based Optical Arrays for Space Applications
… by DEHI or the SHWFS are corrected using a Stochastic Parallel Gradient Descent algorithm. In this work we study the effects of optical speckle on SHWFS performance in conditions of weak turbulence. We develop a method for modeling these effects across a range of target and sensor …