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      On the performance of linear least-squares estimation in wireless positioning systems

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      Author
      Gezici, Sinan
      Güvenç, İ.
      Sahinoğlu, Z.
      Date
      2008-05
      Source Title
      2008 IEEE International Conference on Communications
      Publisher
      IEEE
      Pages
      4203 - 4208
      Language
      English
      Type
      Conference Paper
      Item Usage Stats
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      Abstract
      A common technique for wireless positioning is to estimate time-of-arrivals (TOAs) of signals traveling between a target node and a number of reference nodes, and then to determine the position of the target node based on those TOA parameters. In determining the position of the target node from TOA parameters, linear or nonlinear least-squares (LS) estimation techniques can be employed. Although the linear LS techniques are suboptimal in general, they facilitate low-complexity position estimation. In this paper, performance of various linear LS techniques are compared, and suboptimality of the linear approach is quantified in terms of the Cramer-Rao lower bound (CRLB). Simulations are performed to compare the performance of the linear LS approaches versus the CRLBs for linear and nonlinear techniques. ©2008 IEEE.
      Keywords
      Cramer-Rao lower bound (CRLB)
      Least-squares (LS) estimation
      Time-of-arrival (TOA)
      Wireless positioning
      Chlorine compounds
      Computational fluid dynamics
      Control theory
      Cramer-Rao bounds
      Least squares approximations
      Targets
      Wireless telecommunication systems
      International conferences
      Parameter estimation
      Permalink
      http://hdl.handle.net/11693/26868
      Published Version (Please cite this version)
      http://dx.doi.org/10.1109/ICC.2008.789
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      • Department of Electrical and Electronics Engineering 3636
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