Concept

Group delay and phase delay

Related publications (96)

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Generalized Sampling: A Variational Approach

Michaël Unser, Thierry Blu

We consider the problem of reconstructing a multidimensional and multivariate function ƒ:

ℜ ^{ m }

\rightarrow

ℜ ^{ n }

from the discretely and irregularly sampled responses of q linear shift-invariant filters. Unlike traditional approaches which r ...

SampTA2001

All-fiber phase modulator based on lead zirconate titanate thin-film coating

Nava Setter, Paul Muralt, René Salathé, Hans Georg Limberger

An all-fiber phase modulator based on lead titanate zirconate coating deposited by dc reactive magnetron sputtering was fabricated and optically characterized. The frequency response showed a flat broadband structure up to 600 kHz, with an efficiency of 0. ...

2001

Numerical dispersion compensation for Partial Coherence Interferometry and Optical Coherence Tomography

Theo Lasser, Boris Clément Karamata

Dispersive samples introduce a wavelength dependent phase distortion to the probe beam. This leads to a noticeable loss of depth resolution in high resolution OCT using broadband light sources. The standard technique to avoid this consequence is to balance ...

2001

A low-power CMOS super-regenerative receiver at 1 GHz

Catherine Dehollain, Michel Declercq

A low-power and low-voltage super-regenerative receiver operating at 1 GHz and implemented in a 0.35-μm CMOS process is described. The receiver includes an low-noise amplifier, a super-regenerative oscillator, an envelope detector, an AGC circuitry with sa ...

2001

To code or not to code

Martin Vetterli, Michael Christoph Gastpar, Bixio Rimoldi

The theory and practice of digital communication during the past 50 years has been strongly influenced by Shannon's separation theorem. While it is conceptually and practically appealing to separate source from channel coding, either step requires infinite ...

2000

Accurate orientation for airborne mapping systems

Jan Skaloud

Stringent requirements on the accuracy of attitude determi- nation are currently a major challenge for strapdown INS/GPS integration, which is at the core of self-contained airborne remote sensing and mapping systems. This paper reviews the error models fo ...

2000

Method for controlling the shift invariance of optical correlators

Demetri Psaltis

Holographic correlators can implement many correlations in parallel. For most systems shift invariance limits the number of correlation templates that can be stored in one correlator. This is because the output plane must be divided among the individual te ...

1999

Holographic correlator array with selectable shift-invariance

Demetri Psaltis

Optical holographic correlators can perform many correlations simultaneously. Because the output plane must be divided among the individual templates in the system, for many systems shift-invariance limits the number of correlation templates than can be st ...

1998

Generalized Sampling: Stability and Performance Analysis

Michaël Unser

Generalized sampling provides a general mechanism for recovering an unknown input function

f(x) \in H

from the samples of the responses of m linear shift-invariant systems sampled at 1 ⁄ mth the reconstruction rate. The system can be designed to perform ...

IEEE1997

Wavelets and recursive filter banks

Martin Vetterli

It is shown that infinite impulse response (IIR) filters lead to more general wavelets of infinite support than finite impulse response (FIR) filters. A complete constructive method that yields all orthogonal two channel filter banks, where the filters hav ...

1993

Generalized Sampling: A Variational Approach

Michaël Unser, Thierry Blu

We consider the problem of reconstructing a multidimensional and multivariate function ƒ:

ℜ ^{ m }

\rightarrow

ℜ ^{ n }

from the discretely and irregularly sampled responses of q linear shift-invariant filters. Unlike traditional approaches which r ...

SampTA2001

Generalized Sampling: Stability and Performance Analysis

Michaël Unser

Generalized sampling provides a general mechanism for recovering an unknown input function

f(x) \in H

from the samples of the responses of m linear shift-invariant systems sampled at 1 ⁄ mth the reconstruction rate. The system can be designed to perform ...

IEEE1997