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      Cross-ambiquity function domain multipath channel parameter estimation

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      Author(s)
      Guldogan, M. B.
      Arıkan, Orhan
      Date
      2011-11-23
      Source Title
      Digital Signal Processing
      Print ISSN
      1051-2004
      Publisher
      Elsevier
      Volume
      22
      Issue
      2
      Pages
      275 - 287
      Language
      English
      Type
      Article
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      Abstract
      A new array signal processing technique is proposed to estimate the direction-of-arrivals (DOAs), time delays, Doppler shifts and amplitudes of a known waveform impinging on an array of antennas from several distinct paths. The proposed technique detects the presence of multipath components by integrating cross-ambiguity functions (CAF) of array outputs, hence, it is called as the cross-ambiguity function direction finding (CAF-DF). The performance of the CAF-DF technique is compared with the space-alternating generalized expectation-maximization (SAGE) and the multiple signal classification (MUSIC) techniques as well as the Cramer-Rao lower bound. The CAF-DF technique is found to be superior in terms of root-mean-squared-error (rMSE) to the SAGE and MUSIC techniques. (
      Keywords
      Direction-of-arrival (doa)
      Multipath channels
      Channel estimation
      Cross-ambiguity function (CAF)
      Space-alternating generalized expectation-maximization (SAGE) Algorithm
      Permalink
      http://hdl.handle.net/11693/12303
      Published Version (Please cite this version)
      http://dx.doi.org/10.1016/j.dsp.2011.11.002
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      • Department of Electrical and Electronics Engineering 4012
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