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dc.contributor.advisor Sabharwal, Ashutosh
dc.creatorMehrotra, Nishant
dc.date.accessioned 2020-11-24T14:24:00Z
dc.date.available 2020-11-24T14:24:00Z
dc.date.created 2020-12
dc.date.issued 2020-11-20
dc.date.submitted December 2020
dc.identifier.citation Mehrotra, Nishant. "Degrees of Freedom Analysis for Multipath-Assisted Imaging Systems." (2020) Master’s Thesis, Rice University. https://hdl.handle.net/1911/109578.
dc.identifier.urihttps://hdl.handle.net/1911/109578
dc.description.abstract We study the resolution limits of multipath-assisted imaging systems, a special class of computational radar/wireless imaging systems that exploit the multipath effects inherent to wireless propagation in order to increase the imaging resolution. Prior multipath-assisted system designs have demonstrated large resolution gains over line-of-sight (LOS) only imaging systems for error-free setups with no calibration errors. However, practical wireless imaging system designs suffer from phase synchronization errors and time-varying multipath. In this thesis, we first derive conditions for and demonstrate a multipath-assisted resolution gain over LOS-only imaging systems in the error-free case. We then quantify the effect of phase synchronization errors and channel matrix mismatch (due to time-varying multipath) on the achievable resolution limits. Our results show that channel matrix mismatch results in a large resolution loss compared to the error-free case; however, under certain conditions, resolution equivalent to the error-free case is achievable in the presence of phase synchronization errors. This indicates that a redesign of current multipath-assisted imaging systems is required as the performance gain of current designs (that calibrate only once prior to imaging) is limited in practical wireless environments with mobility.
dc.format.mimetype application/pdf
dc.language.iso eng
dc.subjectCalibration
Computational Imaging
Degrees of Freedom
Multipath
Wireless Communications
dc.title Degrees of Freedom Analysis for Multipath-Assisted Imaging Systems
dc.type Thesis
dc.date.updated 2020-11-24T14:24:00Z
dc.type.material Text
thesis.degree.department Electrical and Computer Engineering
thesis.degree.discipline Engineering
thesis.degree.grantor Rice University
thesis.degree.level Masters
thesis.degree.name Master of Science


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