engineering, and statistics, the frequency domain refers to the analysis of mathematical functions or signals with respect to frequency (and possibly phase), rather...
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time–frequency analysis comprises those techniques that study a signal in both the time and frequency domains simultaneously, using various time–frequency...
21 KB (3,667 words) - 04:01, 17 July 2024
The finite-difference frequency-domain (FDFD) method is a numerical solution method for problems usually in electromagnetism and sometimes in acoustics...
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Laplace transform (redirect from Complex frequency)
in the time domain) to a function of a complex variable s {\displaystyle s} (in the complex-valued frequency domain, also known as s-domain, or s-plane)...
75 KB (9,390 words) - 06:38, 28 August 2024
Frequency converter Frequency domain Frequency distribution Frequency extender Frequency grid Frequency level Frequency modulation Frequency spectrum Interaction...
21 KB (2,290 words) - 11:44, 15 July 2024
specific frequency response can be designed using analog and digital filters. The frequency response characterizes systems in the frequency domain, just...
11 KB (1,281 words) - 13:26, 18 June 2024
The frequency domain decomposition (FDD) is an output-only system identification technique popular in civil engineering, in particular in structural health...
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Frequency domain (FD) sensor is an instrument developed for measuring soil moisture content. The instrument has an oscillating circuit, the sensing part...
3 KB (411 words) - 21:38, 23 November 2022
EEG analysis (section Frequency domain methods)
EEG analysis methods fall into four categories: time domain, frequency domain, time-frequency domain, and nonlinear methods. There are also later methods...
20 KB (2,492 words) - 17:32, 17 August 2024
spatial frequencies, as a substitute for the more precise term spatial domain. The use of the contrasting terms time domain and frequency domain developed...
2 KB (256 words) - 05:51, 4 October 2022
Digital signal processing (section Frequency domain)
numbers that represent samples of a continuous variable in a domain such as time, space, or frequency. In digital electronics, a digital signal is represented...
27 KB (2,990 words) - 14:30, 22 August 2024
Analog signal processing (section Frequency domain)
mathematically modeled and is represented in the time domain as h(t) and in the frequency domain as H(s), where s is a complex number in the form of s=a+ib...
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Spectral analysis (redirect from Frequency domain analysis)
strength of different frequency components (the power spectrum) of a time-domain signal. This may also be called frequency domain analysis Spectrum analyzer...
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the complex frequency domain parameter s = σ + ωi. In a mass–spring system, with mass m and spring stiffness k, the natural angular frequency can be calculated...
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measure the thermal conductivity of a sample: steady-state, time-domain, and frequency-domain methods. In general, steady-state techniques perform a measurement...
29 KB (3,927 words) - 05:10, 31 July 2024
Telegrapher's equations (section Frequency domain)
both the time domain and the frequency domain. In the time domain the independent variables are distance and time. The resulting time domain equations are...
33 KB (4,599 words) - 08:45, 15 August 2024
f < 0.5 {\displaystyle -0.5\leq \epsilon _{f}<0.5} . The received frequency-domain signal then becomes Z i , k = X i , k − ϵ I H k − ϵ I sin ( π ϵ f...
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Ringing artifacts (section Frequency domain)
not having high frequencies) or passed through a low-pass filter; this is the frequency domain description. In terms of the time domain, the cause of this...
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Magnetic vector potential (section Frequency domain)
same direction as the wire. The preceding time domain equations can be expressed in the frequency domain.: 139 Lorenz gauge ∇ ⋅ A + j ω c 2 ϕ = 0 {\displaystyle...
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replaced by algebraic equations in the frequency domain which is much simpler to solve. However, frequency domain techniques can only be used with linear...
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Ripple (electrical) (redirect from Frequency-domain ripple)
capacitor-input rectifiers. As well as these time-varying phenomena, there is a frequency domain ripple that arises in some classes of filter and other signal processing...
25 KB (4,567 words) - 02:30, 8 November 2023
Root mean square (section In frequency domain)
coefficients. In this case, the RMS computed in the time domain is the same as in the frequency domain: RMS { x [ n ] } = 1 N ∑ n x 2 [ n ] = 1 N 2 ∑ m | X...
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Fourier transform (section Complex domain)
Functions that are localized in the time domain have Fourier transforms that are spread out across the frequency domain and vice versa, a phenomenon known as...
177 KB (21,044 words) - 21:02, 31 August 2024
Single-carrier FDMA (redirect from Single-carrier frequency-domain-equalization)
receiver, a DFT is applied to arrive in the frequency domain, where a simple single-carrier frequency-domain-equalization (SC-FDE) scheme can be employed...
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Induced polarization (redirect from Frequency domain IP)
grain-surface chemistry. The IP survey can be made in time-domain and frequency-domain mode: In the time-domain induced polarization method, the voltage response...
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25 kHz spacing or 5 kHz spacing). Frequency modulation Carson bandwidth rule This article incorporates public domain material from Federal Standard 1037C...
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The multidelay block frequency domain adaptive filter (MDF) algorithm is a block-based frequency domain implementation of the (normalised) Least mean squares...
4 KB (797 words) - 21:33, 10 August 2020
Zero-order hold (section Frequency-domain model)
scaled to the sample values. The filter can then be analyzed in the frequency domain, for comparison with other reconstruction methods such as the Whittaker–Shannon...
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calculus Frequency domain, the analysis of mathematical functions with respect to frequency, rather than time Fundamental domain, subset of a space that...
6 KB (843 words) - 09:46, 9 August 2024
Spatial Frequency Domain Imaging (SFDI) is a non-invasive optical imaging method that uses spatially modulated light to extract quantitative information...
7 KB (899 words) - 21:45, 7 November 2023