DISTRIBUTED TWO-DIMENSIONAL FOURIER TRANSFORMS ON DSPs: WITH AN APPLICATIONS FOR PHASE RETRIEVAL

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dc.contributor.advisorJacob, Bruce Len_US
dc.contributor.advisorYeung, Donalden_US
dc.contributor.authorSmith, Jeffrey Scotten_US
dc.contributor.departmentElectrical Engineeringen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.date.accessioned2007-02-01T20:23:36Z
dc.date.available2007-02-01T20:23:36Z
dc.date.issued2006-12-08en_US
dc.description.abstractMany applications of two-dimensional Fourier Transforms require fixed timing as defined by system specifications. One example is image-based wavefront sensing. The image-based approach has many benefits, yet it is a computational intensive solution for adaptive optic correction, where optical adjustments are made in real-time to correct for external (atmospheric turbulence) and internal (stability) aberrations, which cause image degradation. For phase retrieval, a type of image-based wavefront sensing, numerous two-dimensional Fast Fourier Transforms (FFTs) are used. To meet the required real time specifications, a distributed system is needed, and thus, the 2-D FFT necessitates an all-to-all communication among the computational nodes. The 1-D floating point FFT is very efficient on a digital signal processor (DSP). For this study, several architectures and analysis of such are presented which address the all-to-all communication with DSPs. Emphasis of this research is on a 64-node cluster of Analog Devices TigerSharc TS-101 DSPs.en_US
dc.format.extent7354286 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/1903/4206
dc.language.isoen_US
dc.subject.pqcontrolledEngineering, Electronics and Electricalen_US
dc.subject.pqcontrolledPhysics, Opticsen_US
dc.subject.pqcontrolledEngineering, Electronics and Electricalen_US
dc.subject.pquncontrolledDSPen_US
dc.subject.pquncontrolled2-D FFTen_US
dc.subject.pquncontrolledwavefront sensingen_US
dc.subject.pquncontrolledadaptive opticsen_US
dc.subject.pquncontrolledembeded processingen_US
dc.titleDISTRIBUTED TWO-DIMENSIONAL FOURIER TRANSFORMS ON DSPs: WITH AN APPLICATIONS FOR PHASE RETRIEVALen_US
dc.typeThesisen_US

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