# What is the difference between Fourier transform and Laplace transform?

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## What is the difference between Fourier transform?

The Fourier series is used to represent a periodic function by a discrete sum of complex exponentials, while the Fourier transform is then used to represent a general, nonperiodic function by a continuous superposition or integral of complex exponentials.

## What is difference between Fourier and Laplace transform?

Fourier transform is the special case of laplace transform which is evaluated keeping the real part zero. … Fourier transform is generally used for analysis in frequency domain whereas laplace transform is generally used for analysis in s-domain(it’s not frequency domain).

## Is Fourier series related to Laplace transform?

We start with Fourier series, which are a way to write periodic functions as sums of sinusoids. … The Laplace transform converts a DE for the function x(t) into an algebraic equation for its Laplace transform X(s). Then, once we solve for X(s) we can recover x(t).

## What is the main difference between Fourier series and Fourier transform?

Fourier series is an expansion of periodic signal as a linear combination of sines and cosines while Fourier transform is the process or function used to convert signals from time domain in to frequency domain.

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## What is the difference between Fourier integrals and Fourier transforms?

Fourier integral is any integral of the form ∫∞−∞y(ω)eiωtdω . Fourier integral of a function f is any Fourier integral, that satisfies x(t)=∫∞−∞y(ω)eiωtdω . You can choose y=Fx to find a suitable y. The Fourier transform is usually defined with an expression such that it has to exist everywhere.

## What is DFT and Idft?

The discrete Fourier transform (DFT) and its inverse (IDFT) are the primary numerical transforms relating time and frequency in digital signal processing.

## What is the difference between DFT and DTFT?

A DFT sequence has periodicity, hence called periodic sequence with period N. A DTFT sequence contains periodicity, hence called periodic sequence with period 2π. The DFT can be calculated in computers as well as in digital processors as it does not contain any continuous variable of frequency.

## What is Fourier Transform?

The Fourier Transform is a mathematical technique that transforms a function of time, x(t), to a function of frequency, X(ω). It is closely related to the Fourier Series. … A little work (and replacing the sum by an integral) yields the synthesis equation of the Fourier Transform.

## Why is Laplace better than Fourier?

Laplace transforms can capture the transient behaviors of systems. Fourier transforms only capture the steady state behavior. Of course, Laplace transforms also require you to think in complex frequency spaces, which can be a bit awkward, and operate using algebraic formula rather than simply numbers.

## What is the difference between S domain and frequency domain?

So, the invention of the S-domain has simplifies the system and signal analysis very much. The signals and systems can be described also in the frequency domain. The frequency domain is a special domain of the la Place domain by formally making S= jw where j is the imaginary and w is the frequency.