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Frequency domain optical reflectometer
Applied Optics, 1981A correlation reflectometer operating in the frequency domain is described. It is shown that such an instrument is well adapted to detecting weak discrete reflections. The detection of end reflections in a 2.2-km length of fiber whose end is index matched is demonstrated.
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1995
In Definition 4.3.5, we introduced the notion of a transfer function for a state linear system Σ(A, B, C. D) and showed that it was equal to D + C(sI – A)-1B. In this section, we study the input-output relationship directly in the frequency domain without reference to any state-space descriptions.
Ruth F. Curtain, Hans Zwart
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In Definition 4.3.5, we introduced the notion of a transfer function for a state linear system Σ(A, B, C. D) and showed that it was equal to D + C(sI – A)-1B. In this section, we study the input-output relationship directly in the frequency domain without reference to any state-space descriptions.
Ruth F. Curtain, Hans Zwart
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1997
Finite fields are amenable to Fourier transform-like operations which move the data through orthogonal domains in a very similar manner to which the Fourier transform provides a doorway between time and frequency. Just as the Fourier transform extracts pure sine waves from time domain data, the equivalent operation on a finite field extracts features ...
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Finite fields are amenable to Fourier transform-like operations which move the data through orthogonal domains in a very similar manner to which the Fourier transform provides a doorway between time and frequency. Just as the Fourier transform extracts pure sine waves from time domain data, the equivalent operation on a finite field extracts features ...
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2002
We are familiar with systems that are dynamic, that is, systems whose output signals vary with time. Examples are shown in Figure 14.1.
Jacqueline Wilkie +2 more
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We are familiar with systems that are dynamic, that is, systems whose output signals vary with time. Examples are shown in Figure 14.1.
Jacqueline Wilkie +2 more
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2009
For frequency-domain FLIM (fluorescence lifetime imaging microscopy), the amplitude of the excitation light is modulated repetitively at high frequency (HF). Radio frequencies between 1 and 200 MHz are nominal and chosen in order for the fluorescence response (nanoseconds) to be sensitive to the frequency of repetition/modulation.
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For frequency-domain FLIM (fluorescence lifetime imaging microscopy), the amplitude of the excitation light is modulated repetitively at high frequency (HF). Radio frequencies between 1 and 200 MHz are nominal and chosen in order for the fluorescence response (nanoseconds) to be sensitive to the frequency of repetition/modulation.
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1983
By frequency-domain analysis one generally means an analysis of systems based on representing input and output as linear combinations of sinusoidal functions. Such an analysis is most useful for studying the steady-state behavior of linear and time-invariant systems.
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By frequency-domain analysis one generally means an analysis of systems based on representing input and output as linear combinations of sinusoidal functions. Such an analysis is most useful for studying the steady-state behavior of linear and time-invariant systems.
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2017
Signals which are sufficiently stationary permit highly efficient coding in the frequency domain. Such signals include speech signals such as sustained vowels and prolonged fricatives, as well as generic audio signals such as music and mixed material. The main components of frequency domain coding methods include windowing, a time-frequency transform ...
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Signals which are sufficiently stationary permit highly efficient coding in the frequency domain. Such signals include speech signals such as sustained vowels and prolonged fricatives, as well as generic audio signals such as music and mixed material. The main components of frequency domain coding methods include windowing, a time-frequency transform ...
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1974
The purpose of this chapter is to present an in-depth study of certain frequency domain implications of linear state variable feedback (l.s.v.f.) from the point of view of the structure theorem in order to develop some rather general procedures for the compensation of linear multivariable systems.
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The purpose of this chapter is to present an in-depth study of certain frequency domain implications of linear state variable feedback (l.s.v.f.) from the point of view of the structure theorem in order to develop some rather general procedures for the compensation of linear multivariable systems.
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