Results 201 to 210 of about 799,682 (264)
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Biometrika, 1973
SUMMARY It is suggested that in estimating spectra and cross spectra for a pair of stationary series the estimation of the phase may be replaced by an estimate of the group delay, which is the derivative of phase with respect to frequency. An estimate is proposed and its asymptotic properties are investigated.
Hannan, E. J., Thomson, P. J.
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SUMMARY It is suggested that in estimating spectra and cross spectra for a pair of stationary series the estimation of the phase may be replaced by an estimate of the group delay, which is the derivative of phase with respect to frequency. An estimate is proposed and its asymptotic properties are investigated.
Hannan, E. J., Thomson, P. J.
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Group delay as an estimate of delay in logic
IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems, 1991It is an accepted practice in signal delay estimation to model MOS digital circuits as RC circuits. In most cases Elmore's definition is exactly equivalent to the group delay of the network at zero frequency. A computationally efficient noniterative method to calculate this delay for networks with any linear elements and arbitrary topology is presented.
Jirí Vlach +4 more
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Synthesis of the group delay equalizers
9th International Conference on Electronics, Circuits and Systems, 2003This paper is a presentation of a new method for designing equalizers of the group delay type. The method is based on the characteristic equation of all-pass filters. The approximation problem, which is solved by a special numeric algorithm, works with zeros and poles of the characteristic function of the all-pass filters.
J. Vrbata, Milos Laipert, Miroslav Vlcek
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The estimation of coherence and group delay
Biometrika, 1971SUMMARY The usual estimation of coherence is known to be badly biased towards zero if over the band of frequencies used for its estimation the phase is changing rapidly, as in the case of large group delay. The usual asymptotic distribution theory for spectral estimates is of no value in this circumstance, since it does not involve the group delay.
Hannan, E. J., Thomson, P. J.
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Delayed feedback amplifiers with maximum flat group delay
2013 IEEE 20th International Conference on Electronics, Circuits, and Systems (ICECS), 2013This paper proposes a theoretical framework suitable for the realization of maximum flat group delay transfer functions in delayed feedback amplifiers. Theoretical results are presented for first order negative feedback amplifiers having a delay element inside the feedback loop.
Dinka Milovancev, Luís Nero Alves
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A delayed-feedback filter with negative group delay
Chaos: An Interdisciplinary Journal of Nonlinear Science, 2018A filter with delay-induced negative group delay is presented. The filter consists of multiple time-delayed feedback terms, which lead to a negative group delay for frequencies in the baseband. It can be used for the real-time prediction of band-limited signals. The filter is universal as it does not rely on a specific model of the signal. Specifically,
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Group delay and group delay sensitivity of periodically switched linear networks
IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications, 2000This paper presents a method for the computation of group delay and group delay sensitivity of periodically switched networks containing all types of linear elements. The method is accurate because no approximation is made, and efficient because some parts of the computations are performed only once, in a preprocessing step before simulation starts ...
B. Raahemi, A. Opal
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Group delay processing of radar signals
ICASSP '86. IEEE International Conference on Acoustics, Speech, and Signal Processing, 2005A new method of processing the radar signals is presented in this paper. The method is based on the two properties of the magnitude group delay (MGD) function, namely, MGD has high resolution, and it is possible to manipulate different regions of the spectrum independently in the MGD domain.
K. B. Raju, G. R. Reddy, V. V. Rao
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Group Delay Estimation with Wideband Signals
IEEE Transactions on Communications, 1979A new formula for the group delay of a network is derived. The formula is not restricted to narrow-band signals and is valid up to quite large bandwidths. A simple and very sensitive technique for group delay measurement, based on this new relation, is described.
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