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Application of Hadamard transformation to MEKC
ELECTROPHORESIS, 2007AbstractThe Hadamard transform (HT) technique, which permits the S/N in CE to be improved, was applied to MEKC. Multiple sample injection of fluorescent analytes according to a Hadamard code sequence was performed using an optically gated sample injection technique, in which a sample plug was produced based on photodegradation by irradiation with an ...
Kazuki Hata +2 more
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Hadamard Transform Spectroscopy [PDF]
, 1980 Fourier Transform Interferometry has become a useful tool in infrared spectroscopy. These instruments require very exacting optics and mechanical alignments which require micrometer accuracy in mirror alignments and the measurement of mirror displacement.
W. G. Fateley +2 more
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Fourier Transform vs Hadamard Transform Spectroscopy
Applied Optics, 1973Recent articles have claimed a significant S/N advantage of Hadamard transform spectroscopy over Fourier transform spectroscopy. The scanty published data does not support this assertion, and the possibility that the claim is valid in theory is examined.
Tomas Hirschfeld, Gerry Wyntjes
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Use of the 1-D Hadamard Transform in the Computation of a 2-D Hadamard Transform [PDF]
, 1997 Let X be an N(= 2 n ) × M (= 2 m ) dimensional data matrix and let Y be the N × M Hadamard transform matrix as $$ \begin{gathered} X = \left( \begin{gathered} {x_{{11}}}\quad {x_{{12}}}\quad \cdots \quad {x_{{12}}} \hfill \\ {x_{{21}}}\quad {x_{{22}}}\quad \cdots \quad {x_{{12}}} \hfill \\ \;\, \vdots \quad \quad \vdots \quad \;\;\; \vdots \quad \;\
R. K. Rao Yarlagadda, John Erik Hershey
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1975
This chapter is devoted to the study of the Walsh-Hadamard transform (WHT), which is perhaps the most well-known of the nonsinusoidal orthogonal transforms. The WHT has gained prominence in various digital signal processing applications, since it can essentially be computed using additions and subtractions only. Consequently its hardware implementation
N. U. Ahmed, K. R. Rao
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This chapter is devoted to the study of the Walsh-Hadamard transform (WHT), which is perhaps the most well-known of the nonsinusoidal orthogonal transforms. The WHT has gained prominence in various digital signal processing applications, since it can essentially be computed using additions and subtractions only. Consequently its hardware implementation
N. U. Ahmed, K. R. Rao
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[1988] Proceedings. The Twentieth Southeastern Symposium on System Theory, 2003
A four-level Hadamard transform that is more general than the binary Hadamard transform is presented. The transform maintains the same row orthogonality as the binary Hadamard transform but requires the use of complex numbers. A four-level Walsh transform is also obtained from the four-level Hadamard transform.
Yuan Chengchi, J.J. Komo
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A four-level Hadamard transform that is more general than the binary Hadamard transform is presented. The transform maintains the same row orthogonality as the binary Hadamard transform but requires the use of complex numbers. A four-level Walsh transform is also obtained from the four-level Hadamard transform.
Yuan Chengchi, J.J. Komo
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A Stationary Hadamard Transform Interferometer
SPIE Proceedings, 1989Optical interferometers have been used extensively in many applied fields of science including chemistry and physics. Conventional interferometers have provided one, if not more of the following advantages over conventional dispersive spectrometers: (1) multiplex advantage (Fellgett's advantage) (2) high frequency precision (Connes' advantage) (3) high
J.D. Tate +3 more
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Hadamard Transform Raman Imaging
Applied Spectroscopy, 1988Hadamard mask encoding allows medium to high spatial resolution imaging with unfocused laser beams. A laser beam is imaged on the sample through a series of masks. The spatially encoded signals from each of n masks, each containing n resolution elements, are measured. The spatial distribution of the signal is recovered by Hadamard transformation of the
Patrick J. Treado, Michael D. Morris
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Hadamard–Transform Image Scanning
Applied Optics, 1970We point out the applicability of optical Hadamard-transform coding to detector-noise-limited image scanning and give approximate signal-to-noise ratio gains over conventional point-by-point scanning for several whole-image multiplex scanning schemes.
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High Resolution Hadamard Transform Spectrometer
Applied Optics, 1972The ir spectrometer described employs alkaline halide lenses, an echelle grating, and a cryogenically cooled doped germanium bolometer as a detector. It is provided for two possible modes of operation: one is a single slit or conventional scan, the other is a multiplex or Hadamard scan.
Hansen, Peter, Strong, John
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