• Bilinear timefrequency distributions, or quadratic timefrequency distributions, arise in a sub-field of signal analysis and signal processing called...
    19 KB (3,916 words) - 01:53, 19 January 2025
  • because the representation is quadratic in the signal (see Bilinear timefrequency distribution). This formulation was first described by Eugene Wigner in...
    7 KB (928 words) - 09:37, 3 April 2025
  • Wavelet transform, Bilinear timefrequency distribution function (Wigner distribution function, or WDF), Modified Wigner distribution function, Gabor–Wigner...
    22 KB (3,734 words) - 21:42, 19 February 2025
  • Thumbnail for Wigner distribution function
    The Wigner distribution function (WDF) is used in signal processing as a transform in time-frequency analysis. The WDF was first proposed in physics to...
    18 KB (3,607 words) - 01:55, 19 January 2025
  • Thumbnail for Wigner quasiprobability distribution
    distributions in time–frequency analysis Squeezed coherent state Bilinear timefrequency distribution Continuous-variable quantum information Specifically, since...
    38 KB (5,299 words) - 18:45, 26 February 2025
  • referred to as "quadratic" or bilinear timefrequency distributions. A core member of this class is the Wigner–Ville distribution (WVD), as all other TFDs...
    9 KB (1,323 words) - 07:11, 18 January 2022
  • Spectral correlation density (category Timefrequency analysis)
    the bilinear time-frequency distributions, but is not considered one of Cohen's class of distributions. The cyclic auto-correlation function of a time-series...
    9 KB (1,432 words) - 04:49, 19 May 2024
  • Thumbnail for Filter bank
    time–frequency domain. It is related to the Wigner–Ville distribution by a two-dimensional filtering that defines the class of quadratic (or bilinear) time–frequency...
    39 KB (5,930 words) - 23:14, 16 May 2025
  • spectrogram, and the modified WDs all belong to the Cohen's class of bilinear time-frequency representations : C x ( t , f ) = ∫ − ∞ ∞ ∫ − ∞ ∞ W x ( θ , ν )...
    10 KB (2,560 words) - 19:36, 6 February 2025
  • Ambiguity function (category Timefrequency analysis)
    fundamental to the formulation of other timefrequency distributions: the bilinear timefrequency distributions are obtained by a 2-dimensional filtering...
    19 KB (3,643 words) - 01:56, 19 January 2025
  • Thumbnail for Convolution
    generally, Young's inequality implies that the convolution is a continuous bilinear map between suitable Lp spaces. Specifically, if 1 ≤ p, q, r ≤ ∞ satisfy:...
    67 KB (8,819 words) - 15:20, 10 May 2025
  • Thumbnail for Terence Tao
    Space-time estimates for null forms and the local existence theorem. Comm. Pure Appl. Math. 46 (1993), no. 9, 1221–1268. Wolff, Thomas. A sharp bilinear cone...
    79 KB (6,678 words) - 04:54, 19 May 2025
  • (x)=\langle x,\varphi \rangle } . This pairing defines a nondegenerate bilinear mapping ⟨ ⋅ , ⋅ ⟩ : V × V ∗ → F {\displaystyle \langle \cdot ,\cdot \rangle...
    45 KB (6,865 words) - 10:32, 17 March 2025
  • Thumbnail for Reassignment method
    Reassignment method (category Timefrequency analysis)
    useful information concerning the distribution of energy in multi-component signals. Cohen's class of bilinear time-frequency representations is a class of...
    25 KB (4,004 words) - 00:53, 6 December 2024
  • Thumbnail for Fast Fourier transform
    converts a signal from its original domain (often time or space) to a representation in the frequency domain and vice versa. The DFT is obtained by decomposing...
    67 KB (7,814 words) - 18:05, 2 May 2025
  • Hilbert transform (category Schwartz distributions)
    analysis. Various generalizations of the Hilbert transform, such as the bilinear and trilinear Hilbert transforms are still active areas of research today...
    60 KB (8,167 words) - 17:05, 14 April 2025
  • The cone-shape distribution function, also known as the Zhao–Atlas–Marks time-frequency distribution, (acronymized as the ZAM distribution or ZAMD), is...
    6 KB (850 words) - 01:57, 19 January 2025
  • the window size to a desired frequency. For this method the tradeoff is this between time and frequency resolutions. Bilinear transforms may be applied,...
    10 KB (1,578 words) - 19:32, 5 December 2023
  • observing that it satisfies similar properties to those of an inner product: bilinear: for constants a {\displaystyle a} and b {\displaystyle b} and random variables...
    29 KB (4,754 words) - 01:56, 4 May 2025
  • modulation distribution is a 3D representation of a type of bilinear timefrequency distribution similar, but not the same, as other time-frequency distributions...
    15 KB (2,107 words) - 04:20, 29 January 2023
  • Thumbnail for Discretization
    is known as the bilinear transform, or Tustin transform. Each of these approximations has different stability properties. The bilinear transform preserves...
    14 KB (2,400 words) - 04:27, 20 November 2024
  • _{t_{1}}-\Phi _{t_{2}})=I*\Phi _{t_{1}}-I*\Phi _{t_{2}}.} Because convolution is bilinear, convolving against the difference of Gaussians is equivalent to applying...
    9 KB (1,312 words) - 15:38, 19 March 2025
  • (ARB_vertex_program) Render to Texture Hardware Transform and Lighting(T&L) MipMap Bilinear texture filtering Alpha blending Full-scene anti-aliasing (2×2) Phong Shading...
    9 KB (823 words) - 17:23, 1 April 2025
  • Thumbnail for Reproducing kernel Hilbert space
    bandlimited continuous functions H {\displaystyle H} . Fix some cutoff frequency 0 < a < ∞ {\displaystyle 0<a<\infty } and define the Hilbert space H =...
    33 KB (6,323 words) - 04:53, 8 May 2025
  • Thumbnail for JPEG
    also choose to generate Huffman tables optimized for the actual frequency distributions in images being encoded. The process of encoding the zig-zag quantized...
    109 KB (13,565 words) - 23:03, 7 May 2025
  • interpolation methods/algorithms, such as inverse distance weighting, bilinear interpolation and nearest-neighbor interpolation, were already well known...
    14 KB (1,694 words) - 06:50, 9 May 2025
  • mixtures of pure strategies), and the payoff functions of all players are bilinear functions of the strategies. The Nash equilibrium may sometimes appear...
    59 KB (8,777 words) - 03:54, 12 April 2025
  • Thumbnail for Lorentz transformation
    preserve bilinear forms of various signature. First equation in (D3) can be written more compactly as: where (·, ·) refers to the bilinear form of signature...
    106 KB (14,794 words) - 12:39, 24 April 2025
  • points in terms of a sum of cosine functions oscillating at different frequencies. The DCT, first proposed by Nasir Ahmed in 1972, is a widely used transformation...
    101 KB (11,971 words) - 19:37, 19 May 2025
  • power, such as conversion between AC and DC or changing frequency or phase number. power distribution That portion of an electrical grid between the substation...
    148 KB (19,294 words) - 19:22, 10 April 2025