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Radio Tomographic Imaging with Deep Learning.- [electronic resources]
Radio Tomographic Imaging with Deep Learning. - [electronic resources]
Radio Tomographic Imaging with Deep Learning.- [electronic resources]

상세정보

자료유형  
 학위논문(국외)
자관 청구기호  
기본표목-개인명  
표제와 책임표시사항  
Radio Tomographic Imaging with Deep Learning. - [electronic resources]
발행, 배포, 간사 사항  
발행, 배포, 간사 사항  
Ann Arbor : ProQuest Dissertations & Theses , 2023
    형태사항  
    141 p.
    일반주기  
    Source: Dissertations Abstracts International, Volume: 87-05, Section: A.
    일반주기  
    Advisor: Ma, Xiaoli.
    학위논문주기  
    Thesis (Ph.D.)--Georgia Institute of Technology, 2023.
    요약 등 주기  
    요약Radio tomographic imaging (RTI) is a promising passive computational imaging technique for reconstructing attenuation images induced by objects in wireless networks. The attenuation images can be applied to realize passive object localization, environment monitoring, and even through-wall imaging in security systems. In RTI systems, the attenuation map is also referred to as the space loss field (SLF), which quantifies the attenuation rate of the radio frequency (RF) waves at each location in the imaging area covered by wireless networks. Any object on a signal propagation path causes signal attenuation on received signal strength (RSS) measurements between wireless transceiver pairs due to shadowing effects. The RSS attenuation can be modeled as the 2-dimensional (2D) integral of the SLF scaled by a weighting function. This principle underpins RTI techniques and enables the estimation of the SLF from the RSS measurements.This thesis aims to take advantage of the power of deep learning to develop effective and accurate RTI schemes to deal with one-shot and online imaging scenarios while considering diverse wireless environments. The RTI problem is generally ill-posed with insufficient observations, and traditional techniques that rely solely on optimization algorithms cannot achieve precise reconstruction caused by inaccurate prior assumptions on the SLF images and the noise. Compared to the conventional approaches, deep-learning-based RTI techniques are data-driven methods that can directly learn prior information from data to avoid making unreliable assumptions.Specifically, we design an attention-augmented optimization SLF estimation scheme using both deep learning and traditional optimization algorithms to refine the blurry SLF reconstruction in the one-shot estimation scenario. In addition to the one-shot RTI approach, we harness the temporal correlations across RSS observations at neighboring timesteps to develop an online SLF estimator that leverages past RSS measurements and SLF estimations. To further enhance the SLF imaging performance, we investigate the discriminability of the RTI scheme and exploit the state-of-the-art object detection and semantic segmentation models from the area of computer vision. This leads to the development of a fully deep-learning-based single-shot RTI approach, incorporating the U-Net structure to attain high-resolution SLF recovery. This RTI scheme is further extended to the online scenario. Finally, we address the challenge of model mismatch in the RTI system, where the mathematical model relating SLF and RSS may not perfectly align with real-world conditions. To mitigate this issue, we devise a deep unsupervised domain adaptation (UDA) module to adapt our high-resolution one-shot and online RTI schemes to actual environments while preserving imaging performance to the maximum extent possible. Collectively, these proposed strategies form a comprehensive investigation of the RTI problem from a deeplearning perspective.
    주제명부출표목-일반주제명  
    주제명부출표목-일반주제명  
    주제명부출표목-일반주제명  
    주제명부출표목-일반주제명  
    주제명부출표목-일반주제명  
    주제명부출표목-일반주제명  
    주제명부출표목-일반주제명  
    주제명부출표목-일반주제명  
    주제명부출표목-일반주제명  
    주제명부출표목-일반주제명  
    주제명부출표목-일반주제명  
    주제명부출표목-일반주제명  
    주제명부출표목-일반주제명  
    주제명부출표목-일반주제명  
    부출표목-단체명  
    기본자료저록  
    Dissertations Abstracts International. 87-05A.
    전자적 위치 및 접속  
     원문정보보기

    MARC

     008260219s2023        us            s          000c||eng  d
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    ■020    ▼a9798265401861
    ■035    ▼a(MiAaPQ)AAI32315852
    ■035    ▼a(MiAaPQ)GeorgiaTech76829
    ■040    ▼aMiAaPQ▼cMiAaPQ
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    ■090    ▼a전자자료
    ■1001  ▼aHe,  Ziyan.
    ■24510▼aRadio  Tomographic  Imaging  with  Deep  Learning.▼h[electronic  resources]
    ■260    ▼a[S.l.]▼bGeorgia  Institute  of  Technology.  ▼c2023
    ■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2023
    ■300    ▼a141  p.
    ■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-05,  Section:  A.
    ■500    ▼aAdvisor:  Ma,  Xiaoli.
    ■5021  ▼aThesis  (Ph.D.)--Georgia  Institute  of  Technology,  2023.
    ■520    ▼aRadio  tomographic  imaging  (RTI)  is  a  promising  passive  computational  imaging  technique  for  reconstructing  attenuation  images  induced  by  objects  in  wireless  networks.  The  attenuation  images  can  be  applied  to  realize  passive  object  localization,  environment  monitoring,  and  even  through-wall  imaging  in  security  systems.  In  RTI  systems,  the  attenuation  map  is  also  referred  to  as  the  space  loss  field  (SLF),  which  quantifies  the  attenuation  rate  of  the  radio  frequency  (RF)  waves  at  each  location  in  the  imaging  area  covered  by  wireless  networks.  Any  object  on  a  signal  propagation  path  causes  signal  attenuation  on  received  signal  strength  (RSS)  measurements  between  wireless  transceiver  pairs  due  to  shadowing  effects.  The  RSS  attenuation  can  be  modeled  as  the  2-dimensional  (2D)  integral  of  the  SLF  scaled  by  a  weighting  function.  This  principle  underpins  RTI  techniques  and  enables  the  estimation  of  the  SLF  from  the  RSS  measurements.This  thesis  aims  to  take  advantage  of  the  power  of  deep  learning  to  develop  effective  and  accurate  RTI  schemes  to  deal  with  one-shot  and  online  imaging  scenarios  while  considering  diverse  wireless  environments.  The  RTI  problem  is  generally  ill-posed  with  insufficient  observations,  and  traditional  techniques  that  rely  solely  on  optimization  algorithms  cannot  achieve  precise  reconstruction  caused  by  inaccurate  prior  assumptions  on  the  SLF  images  and  the  noise.  Compared  to  the  conventional  approaches,  deep-learning-based  RTI  techniques  are  data-driven  methods  that  can  directly  learn  prior  information  from  data  to  avoid  making  unreliable  assumptions.Specifically,  we  design  an  attention-augmented  optimization  SLF  estimation  scheme  using  both  deep  learning  and  traditional  optimization  algorithms  to  refine  the  blurry  SLF  reconstruction  in  the  one-shot  estimation  scenario.  In  addition  to  the  one-shot  RTI  approach,  we  harness  the  temporal  correlations  across  RSS  observations  at  neighboring  timesteps  to  develop  an  online  SLF  estimator  that  leverages  past  RSS  measurements  and  SLF  estimations.  To  further  enhance  the  SLF  imaging  performance,  we  investigate  the  discriminability  of  the  RTI  scheme  and  exploit  the  state-of-the-art  object  detection  and  semantic  segmentation  models  from  the  area  of  computer  vision.  This  leads  to  the  development  of  a  fully  deep-learning-based  single-shot  RTI  approach,  incorporating  the  U-Net  structure  to  attain  high-resolution  SLF  recovery.  This  RTI  scheme  is  further  extended  to  the  online  scenario.  Finally,  we  address  the  challenge  of  model  mismatch  in  the  RTI  system,  where  the  mathematical  model  relating  SLF  and  RSS  may  not  perfectly  align  with  real-world  conditions.  To  mitigate  this  issue,  we  devise  a  deep  unsupervised  domain  adaptation  (UDA)  module  to  adapt  our  high-resolution  one-shot  and  online  RTI  schemes  to  actual  environments  while  preserving  imaging  performance  to  the  maximum  extent  possible.  Collectively,  these  proposed  strategies  form  a  comprehensive  investigation  of  the  RTI  problem  from  a  deeplearning  perspective.
    ■590    ▼aSchool  code:  0078.
    ■650  4▼aWireless  networks.
    ■650  4▼aTomography.
    ■650  4▼aDeep  learning.
    ■650  4▼aComputer  vision.
    ■650  4▼aMagnetic  resonance  imaging.
    ■650  4▼aSignal  processing.
    ■650  4▼aNeural  networks.
    ■650  4▼aAdaptation.
    ■650  4▼aDesign.
    ■650  4▼aOptimization  algorithms.
    ■650  4▼aVisualization.
    ■650  4▼aComputer  science.
    ■650  4▼aElectrical  engineering.
    ■650  4▼aMedical  imaging.
    ■690    ▼a0389
    ■690    ▼a0800
    ■690    ▼a0984
    ■690    ▼a0544
    ■690    ▼a0574
    ■71020▼aGeorgia  Institute  of  Technology.
    ■7730  ▼tDissertations  Abstracts  International▼g87-05A.
    ■790    ▼a0078
    ■791    ▼aPh.D.
    ■792    ▼a2023
    ■793    ▼aEnglish
    ■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17360605▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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