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Sökning: WFRF:(Wong Q.) > Övrigt vetenskapligt/konstnärligt

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  • Stoica, Petre, et al. (författare)
  • A unified instrumental variable approach to direction finding in colored noise fields
  • 2009
  • Ingår i: The Digital Signal Processing Handbook. - 9781420046045
  • Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
    • Most parametric methods for direction-of-arrival (DOA) estimation require knowledge of the spatial (sensor-to-sensor) color of the background noise. If this information is unavailable, a serious degradation of the quality of the estimates can result, particularly at low signal-to-noise ratio (SNR) [1-3]. A number of methods have been proposed over the recent years to alleviate the sensitivity to the noise color. If a parametric model of the covariance matrix of the noise is available, the parameters of the noise model can be estimated along with those of the interesting signals [4-7]. Such an approach is expected to performwell in situations where the noise can be accurately modeled with relatively few parameters. An alternative approach, which does not require a precise model of the noise, is based on the principle of instrumental variables (IVs). See Söderström and Stoica [8,9] for thorough treatments of IV methods (IVMs) in the context of identification of linear time-invariant dynamical systems. A brief introduction is given in the appendix. Computationally simple IVMs for array signal processing appeared in [10,11]. These methods perform poorly in difficult scenarios involving closely spaced DOAs and correlated signals.
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  • Stoica, P, et al. (författare)
  • Maximum-likelihood bearing estimation with partly calibrated arrays in spatially correlated noise fields
  • 1996
  • Ingår i: IEEE TRANSACTIONS ON SIGNAL PROCESSING. - : IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC. - 1053-587X. ; 44:4, s. 888-899
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • The problem of using a partly calibrated array for maximum likelihood (ML) bearing estimation of possibly coherent signals buried in unknown correlated noise fields is shown to admit a neat solution under fairly general conditions, More exactly, this pape
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  • Stoica, P, et al. (författare)
  • On a nonparametric detection method for array signal processing in correlated noise fields
  • 1996
  • Ingår i: IEEE TRANSACTIONS ON SIGNAL PROCESSING. - : IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC. ; 44:4
  • Annan publikation (övrigt vetenskapligt/konstnärligt)abstract
    • The correct derivation of maximization of the likelihood function is presented, and the correct form of information theoretic criteria (ITC) for the determination of the number of signals in an unknown correlated noise field is shown. The possible pitfall
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  • Resultat 1-8 av 8

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