Now showing items 1-5 of 5

  • Applications of Adaptive Time Frequency Representations to Underwater Acoustic Signal Processing 

    Baraniuk, Richard G.; Jones, Douglas L.; Tom, Brotherton; Larry, Marple (1991-11-01)
    The authors describe the application of an adaptive optimal kernel (AOK) time-frequency representation to the processing of underwater acoustic data. The optimal kernel is a signal-dependent radially Gaussian function. ...
  • Beyond Time Frequency Analysis: Energy Densities in One and Many Dimensions 

    Baraniuk, Richard G. (1998-09-01)
    Given a unitary operator A representing a physical quantity of interest, we employ concepts from group representation theory to define two natural signal energy densities for A. The first is invariant to A and proves ...
  • Optimal Phase Kernels for Time-Frequency Analysis 

    Wisur-Olsen, Fridtjof (1996-05-01)
    We consider the design of kernels for time-frequency distributions through the phase, rather than amplitude, response. While phase kernels do not attenuate troublesome cross-components, they can translate them in the ...
  • Optimal Phase Kernels for Time-Frequency Analysis 

    Baraniuk, Richard G.; Wisur-Olsen, Fridtjof (1996-01-01)
    We consider the design of kernels for time-frequency distributions through the phase, rather than amplitude, response. While phase kernels do not attenuate troublesome cross-components, they can translate them in the ...
  • Warped Wavelet Bases: Unitary Equivalence and Signal Processing 

    Baraniuk, Richard G.; Jones, Douglas L. (1993-04-01)
    The notions of time, frequency, and scale are generalized using concepts from unitary operator theory and applied to time-frequency analysis, in particular the wavelet and short-time Fourier transform orthonormal bases and ...