Worcester Polytechnic Institute Electronic Theses and Dissertations Collection

Title page for ETD etd-050211-073305


Document Typethesis
Author NameKhan, Umair I
URNetd-050211-073305
TitleComputational Techniques for Comparative Performance Evaluation of RF Localization inside the Human Body
DegreeMS
DepartmentElectrical & Computer Engineering
Advisors
  • Kaveh Pahlavan, Advisor
  • Sergey Makarov, Co-Advisor
  • Allen Levesque, Committee Member
  • Keywords
  • human
  • body
  • techniques
  • computational
  • localization
  • RF
  • evaluation
  • performance
  • comparitive
  • Date of Presentation/Defense2011-04-28
    Availability unrestricted

    Abstract

    Localization inside the human body using radio frequency (RF) transmission is gaining importance in a number of applications such as Capsule Endoscopy. The accuracy of RF localization depends on the technology adopted for this purpose. The two most common RF localization technologies use received signal strength (RSS) and time-of-arrival (TOA). This research presents a comparison of the accuracy of TOA and RSS based localization inside human tissue using computational techniques for simulation of radio propagation inside human tissues. Computer simulation of the propagation of radio waves inside the human body is extremely challenging and computationally intensive. We designed a basic, MATLAB coded, finite difference time-domain (FDTD) for the radio propagation in and around the human body and compared the results obtained from this software with the commonly used and commercially available Finite Element Method (FEM) modeling in Ansoft HFSS (ANSYS). We first show that the FDTD analysis yields comparable results. Then we use the software to simulate the RSS and TOA of the wideband signals propagated inside the human body for RF localization to compare the accuracies of the two methods. The accuracy of each technique is compared with the Cramer-Rao Lower Bound (CRLB) commonly used for calculation of bounds for the performance of localization techniques and the effects of human body movements.

    Files
  • ukhan.pdf

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