• A discrete Hartley transform (DHT) is a Fourier-related transform of discrete, periodic data similar to the discrete Fourier transform (DFT), with analogous...
    23 KB (4,188 words) - 15:25, 25 February 2025
  • discrete version of the transform, the discrete Hartley transform (DHT), was introduced by Ronald N. Bracewell in 1983. The two-dimensional Hartley transform...
    10 KB (1,340 words) - 00:07, 18 June 2025
  • Thumbnail for Fast Fourier transform
    Fourier transform (FFT) is an algorithm that computes the discrete Fourier transform (DFT) of a sequence, or its inverse (IDFT). A Fourier transform converts...
    67 KB (7,809 words) - 22:24, 23 June 2025
  • Thumbnail for Discrete Fourier transform
    In mathematics, the discrete Fourier transform (DFT) converts a finite sequence of equally-spaced samples of a function into a same-length sequence of...
    76 KB (12,333 words) - 05:19, 3 May 2025
  • Discrete Hartley transform Discrete sine transform Discrete wavelet transform Hadamard transform (or, Walsh–Hadamard transform) Fast wavelet transform Hankel...
    3 KB (266 words) - 20:08, 15 June 2025
  • variables. Z-transform, a generalization of the DTFT to the entire complex plane Modified discrete cosine transform (MDCT) Discrete Hartley transform (DHT) Also...
    7 KB (1,001 words) - 15:55, 27 May 2025
  • Thumbnail for Ralph Hartley
    Lyon Hartley (November 30, 1888 – May 1, 1970) was an American electronics researcher. He invented the Hartley oscillator and the Hartley transform, and...
    13 KB (1,535 words) - 23:50, 27 May 2025
  • to any other transform (of prime order) with a similar property, such as a number-theoretic transform or the discrete Hartley transform. The algorithm...
    7 KB (1,095 words) - 21:35, 10 December 2024
  • function Distribution Oscillatory integral Laplace transform Discrete Hartley transform List of transforms Dirichlet kernel Fejér kernel Convolution theorem...
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  • Thumbnail for Orthogonal frequency-division multiplexing
    transform (FFT). However, there exist other orthogonal transforms that can be used. For example, OFDM systems based on the discrete Hartley transform...
    88 KB (11,274 words) - 10:03, 25 May 2025
  • 1st method of optimal processing for N-OFDM signals after Fast Fourier transform (FFT). In this regard need to say that W. Kozek and A. F. Molisch wrote...
    14 KB (1,842 words) - 04:32, 22 July 2023
  • up DHT in Wiktionary, the free dictionary. DHT may refer to: Discrete Hartley transform, in mathematics Distributed hash table, lookup service in computing...
    826 bytes (132 words) - 18:44, 27 May 2025
  • Thumbnail for Fourier transform
    original Fourier transform on R or Rn, notably includes the discrete-time Fourier transform (DTFT, group = Z), the discrete Fourier transform (DFT, group =...
    177 KB (21,313 words) - 02:31, 2 June 2025
  • Thumbnail for Sine and cosine transforms
    terms which are summed. Discrete cosine transform Discrete sine transform Hartley transform — a composite sine & cosine transform that does not require...
    19 KB (2,693 words) - 23:38, 17 June 2025
  • for the Laplace transform, the two-sided Laplace transform and, when suitably modified, for the Mellin transform and Hartley transform (see Mellin inversion...
    22 KB (1,984 words) - 09:41, 9 March 2025
  • Thumbnail for Nyquist–Shannon sampling theorem
    Fourier transform that is zero outside of a finite region of frequencies. Intuitively we expect that when one reduces a continuous function to a discrete sequence...
    51 KB (6,838 words) - 02:04, 23 June 2025
  • Massey the following year. In 1972, Nasir Ahmed proposes the discrete cosine transform (DCT). It later becomes the most widely used lossy compression...
    14 KB (1,725 words) - 14:51, 25 May 2025
  • Thumbnail for White noise
    vector. In particular, under most types of discrete Fourier transform, such as FFT and Hartley, the transform W of w will be a Gaussian white noise vector...
    30 KB (4,020 words) - 16:50, 6 May 2025
  • improvement of Reed–Solomon codes 1972 – Nasir Ahmed proposes the discrete cosine transform (DCT), which he develops with T. Natarajan and K. R. Rao in 1973;...
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  • Thumbnail for Logit
    Logit (redirect from Logistic transform)
    value: base 2 corresponds to a shannon, base e to a nat, and base 10 to a hartley; these units are particularly used in information-theoretic interpretations...
    12 KB (1,515 words) - 02:49, 2 June 2025
  • fundamental matrix was published in 1992 by both Olivier Faugeras and Richard Hartley. Although H. Christopher Longuet-Higgins' essential matrix satisfies a...
    11 KB (1,275 words) - 20:51, 16 April 2025
  • Thumbnail for Single-sideband modulation
    standard AM. An alternate method of generation known as a Hartley modulator, named after R. V. L. Hartley, uses phasing to suppress the unwanted sideband. To...
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  • fast Fourier algorithm, especially for images, is treated in The Hartley Transform (1986), in U.S. Patent 4,646,256 (1987, now in the public domain)...
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  • In information theory, the limiting density of discrete points is an adjustment to the formula of Claude Shannon for differential entropy. It was formulated...
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  • theorem (discrete geometry) Descartes's theorem on total angular defect (polyhedra) Erdős–Anning theorem (discrete geometry) Erdős–Nagy theorem (discrete geometry)...
    78 KB (6,289 words) - 12:34, 6 June 2025
  • data compression technique for media bandwidth reduction is the discrete cosine transform (DCT), which was first proposed by Nasir Ahmed in the early 1970s...
    12 KB (1,217 words) - 18:06, 22 May 2025
  • analogue of discrete entropy, but it is not.: 181–218  The actual continuous version of discrete entropy is the limiting density of discrete points (LDDP)...
    23 KB (2,842 words) - 23:31, 21 April 2025
  • Thumbnail for Titan (1963 computer)
    team from Ferranti based in Bracknell working with David Barron, David Hartley, Roger Needham and Barry Landy of Cambridge University Maths Lab developed...
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  • diffraction Geometrical optics Hilbert space Optical correlator Optical Hartley transform Wave field synthesis The equation 2.3 below suggests that u in this...
    73 KB (12,531 words) - 15:38, 25 February 2025
  • Discrete choice Discrete choice analysis Discrete distribution – redirects to section of Probability distribution Discrete frequency domain Discrete phase-type...
    87 KB (8,280 words) - 23:04, 12 March 2025