نتایج جستجو برای: impulse response function

تعداد نتایج: 2076173  

1997
Per Löwenborg Elizabeth Elias Håkan Johansson

A new class of two-channel IIR/FIR filter banks was introduced in [1] with half-band IIR analysis filters and FIR synthesis filters. This type of filter bank features very lowcomplexity analysis filters and simultaneously a low overall complexity. In this paper, we consider finite-wordlength effects of these filter banks.

1998
Christian M. Hafner Helmut Herwartz

In the empirical analysis of nancial time series, multivariate GARCH models have been used in various forms. In most cases it is not well understood how the use of a restricted model has to be paid with loss of valuable information. We investigate the structural implications of the alternative models for the response of the conditional (co{)variances to independent shocks. The impulse response ...

2010
Wail A. Mousa

We propose a new way of performing stable and more efficient F − X wavefield extrapolation for the application of seismic imaging and datuming via Infinite Impulse Response (IIR) F − X filters. To prove the concept, we used model reduction techniques to design the complex-valued IIR F −X extrapolation filters. Simulation results indicate that we can obtain stable designs using the proposed filt...

Journal: :The Journal of the Acoustical Society of America 2007
Thibaut Ajdler Luciano Sbaiz Martin Vetterli

A technique for the recording of large sets of room impulse responses or head-related transfer functions is presented. The technique uses a microphone moving with constant speed. Given a setup (e.g., length of the room impulse response), a careful choice of the recording parameters (excitation signal, speed of movement) leads to the reconstruction of all impulse responses along the trajectory. ...

2013
Vikas Maheshwari Prabhakar Sharma Alka Goyal Vimal K. Yadav Sampath Kumar

In high speed digital integrated circuits, interconnects delay can be significant and should be included for accurate analysis. Delay analysis for interconnect has been done widely by using moments of the impulse response, from the explicit Elmore delay (the first moment of the impulse response) expression, to moment matching methods which creates reduced order trans impedance and transfer func...

2001
Daniel Pérez Palomar Miguel Angel Lagunas Antonio Pascual-Iserte Ana I. Pérez-Neira

The study of joint transmit-receive design over multi-input multioutput (MIMO) channels representing a wireless channel with spatial diversity at both ends is nowadays receiving a signi cant attention. The theoretical closed-form solutions obtained so far are given in the continuous-frequency domain corresponding in general to IIR lters. When those lters are to be implemented in a discrete-time...

1998
Richard O. Duda William L. Martens

The head-related transfer function ~HRTF! varies with range as well as with azimuth and elevation. To better understand its close-range behavior, a theoretical and experimental investigation of the HRTF for an ideal rigid sphere was performed. An algorithm was developed for computing the variation in sound pressure at the surface of the sphere as a function of direction and range to the sound s...

2000
Sunil Bharitkar Chris Kyriakakis

Selectively canceling signals at specific locations within an acoustical environment with multiple listeners is of significant importance for home theater, automobile, teleconferencing, office, industrial and other applications. The traditional noise cancellation approach is impractical for such applications because it requires sensors that must be placed on the listeners. In this paper we inve...

Journal: :basic and clinical neuroscience 0
hassan morsheddost shariati av., tehran, iran 1355-16315 davud asemani shariati av., tehran, iran 1355-16315 mahsa alizadeh shariati av., tehran, iran 1355-16315

introduction: prior studies comparing hemodynamic response function (hrf) in the young and elderly adults based on fmri data have reported inconsistent findings for brain vision and motor regions in healthy aging. it is shown that the averaging method employed in all previous works has caused this inconsistency. the averaging is so sensitive to outliers and noise. however, fmri data are obscure...

2017
J. Havunen J. Hällström A. Bergman A. E. Bergman

Lightning impulse measurements can be highly influenced by measurement arrangement, characteristics of high voltage divider, digitizer (transient recorder) performance, and algorithms used for parameter evaluation. The main sources of measurement errors are the non-ideal step responses of digitizer and voltage divider. This paper discusses the use of deconvolution to correct for the non-ideal s...

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