Results 211 to 220 of about 50,239 (261)
Some of the next articles are maybe not open access.
Phase Distortion and Phase Distortion Correction
Bell System Technical Journal, 1928The importance of the rocle played by the steady state phase characteristics of long cable circuits has recently been emphasized in telephone and telegraph transmission. In this paper an analytical exposition of the theory of phase distortion is followed by a consideration of various methods of phase distortion correction with particular reference to ...
openaire +1 more source
Correcting phase distortion of phase shifting method
The 1st IEEE Global Conference on Consumer Electronics 2012, 2012We propose a method of correcting phase distortion which is caused when measuring any objects by phase shifting method with an ordinary projector. We have measured some objects with the projector which is commercially available [1]. In this paper, we try to improve the precision with the proposing method.
Tsukasa Kato +3 more
openaire +1 more source
Phase Distortion of Averaged Electroencepha
Archives of Otolaryngology - Head and Neck Surgery, 1974Analog filters employed in most averaged electroencephalic response (AER) recording systems impose some phase distortion on recorded AER. Phase distortion of the response results in a real time shift of peak latencies. The extent of this distortion, in general, is determined by the cutoff frequencies of the filter band in relation to the spectrum of ...
R. H. Lane +5 more
openaire +1 more source
International Journal of Circuit Theory and Applications, 1986
AbstractMeasures exclusively reflecting phase distortion are examined and a new phase distortion ‘index’ is proposed. This index, based on the mean‐squared degradation in the impulse response of a filter, is shown to be equivalent to a phase distortion ‘spot‐measure’ using the variation in the peak value of the impulse response, due to phase distortion,
openaire +1 more source
AbstractMeasures exclusively reflecting phase distortion are examined and a new phase distortion ‘index’ is proposed. This index, based on the mean‐squared degradation in the impulse response of a filter, is shown to be equivalent to a phase distortion ‘spot‐measure’ using the variation in the peak value of the impulse response, due to phase distortion,
openaire +1 more source
Phase Distortion Study (Phase B)
1977Abstract : This is the Final Report of a 6 month study of duobinary digital data transmission over the DSCS. Analysis and computer simulations were developed for evaluating the degradation for duobinary SQPSK in the FDMA and TDMA modes, with emphasis on maximizing the bandwidth utilization capability of duobinary signalling. In a linear channel, single-
C. L. May, C. R. Cahn
openaire +1 more source
Correction of phase distortion in spatial heterodyne spectroscopy
Applied Optics, 2004The detailed analysis of measured interferograms generally requires phase correction. Phase-shift correction methods are commonly used and well documented for conventional Fourier-transform spectroscopy. However, measured interferograms can show additional phase errors, depending on the optical path difference and signal frequency, which we call phase ...
Christoph R, Englert +3 more
openaire +2 more sources
The role of internal reflection in transskull phase distortion
Ultrasonics, 2001Phase distortion due to reflection in transcranial ultrasound propagation is investigated. Understanding of these phase-dependent properties is motivated by efforts to construct a reliable prediction model for noninvasive ultrasound therapy in the brain.
G T, Clement, J, Sun, K, Hynynen
openaire +2 more sources
An Improved Phase Modulator with Low Nonlinear Distortion
IEEE Transactions on Communications, 1980A phase modulator with good phase linearity over an extended range of inputs is described. Performance results in terms of signal-to-distortion ratio are given.
Saleem A. Kassam, Tong Leong Lim
openaire +1 more source
Prediction of Distortion of Cylinders without Phase Transformations
Materialwissenschaft und Werkstofftechnik, 2006The rule of Ameen whereby steel made cylinders with no phase transformations during quenching approach the spherical shape is contrary to the finding of Berger, who observes an elongation of thin and long work pieces. If the prediction of Ameen is correct, cylinders should decrease in length during heat treatment.
Frerichs, Friedhelm +4 more
openaire +3 more sources
Effects of quadratic phase distortion on correlator performance
Applied Optics, 1992The deformable mirror spatial light modulator (SLM) has an inherent distortion characteristic that can be approximated as a square-law transfer function. We examine the result of this distortion when this SLM is used in an optical correlator.
J L, Horner, P D, Gianino
openaire +2 more sources