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      • Department of Electrical and Electronics Engineering
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      Range estimation in multicarrier systems in the presence of interference: performance limits and optimal signal design

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      Author
      Karisan, Y.
      Dardari, D.
      Gezici, Sinan
      D'Amico, A. A.
      Mengali, U.
      Date
      2011
      Source Title
      IEEE Transactions on Wireless Communications
      Print ISSN
      1536-1276
      Publisher
      IEEE
      Volume
      10
      Issue
      10
      Pages
      3321 - 3331
      Language
      English
      Type
      Article
      Item Usage Stats
      134
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      111
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      Abstract
      Theoretical limits on time-of-arrival (equivalently, range) estimation are derived for multicarrier systems in the presence of interference. Specifically, closed-form expressions are obtained for Cramer-Rao bounds (CRBs) in various scenarios. In addition, based on CRB expressions, an optimal power allocation (or, spectrum shaping) strategy is proposed. This strategy considers the constraints not only from the sensed interference level but also from the regulatory emission mask. Numerical results are presented to illustrate the improvements achievable with the optimal power allocation scheme, and a maximum likelihood time-of-arrival estimation algorithm is studied to assess the effects of the proposed approach in practical estimators.
      Keywords
      Cognitive radio
      Cramer-Rao bound (CRB)
      Interference
      Orthogonal frequency division multiplexing (OFDM)
      Ranging
      Time-of-arrival (TOA) estimation
      Permalink
      http://hdl.handle.net/11693/21754
      Published Version (Please cite this version)
      http://dx.doi.org/10.1109/TWC.2011.072511.101844
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      • Department of Electrical and Electronics Engineering 3524
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