There are two similar functions used to describe the functional form sin(x)/x One is the sinc() function, and the other is the Sa() function We will only use the
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[PDF] Table of Fourier Transform Pairs
Definition of Inverse Fourier Transform Р ¥ ¥- = w w p w de F tf tj )( 2 1 )( wt tSa ) 2 ( 2 Bt Sa B p )( B rect w )( ttri ) 2 (2 w Sa ) 2 () 2 cos( t t p t rect
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Amplitude of combined cosine and sine Phase Relative proportions of sine and cosine The Fourier Transform: Examples, Properties, Common Pairs Example:
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Transform domain Linearity T akbk Multiplication x(t)y(t) ∑∞ m=−∞ ambk− m Cosine 2A cos(ω0t + B) 1 a+jω Rectangular pulse Π( t 2T ) 2 sin(ωT ) ω Sinc (normalized) sin(Wt) πt Π( ω 2W ) Discrete-time Fourier transform (DTFT)
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f(t) cos (wt) dt For the sake of symmetry, we may define the Fourier cosine transform c by f
[PDF] Table of Fourier Transform Pairs
Function, f(t) Fourier Transform, F(w) Definition of Inverse Fourier Transform Р wt tSa ) 2 ( 2 Bt Sa B p )( B rect w )( ttri ) 2 (2 w Sa ) 2 () 2 cos( t t p t rect
[PDF] Table of Fourier Transform Pairs - Purdue Engineering
Function, f(t) Fourier Transform, F(w) Definition of Inverse Fourier Transform ò wt tSa ) 2 ( 2 Bt Sa B p )( B rect w )( ttri ) 2 (2 w Sa ) 2 () 2 cos( t t p t rect
[PDF] Table of Fourier Transform Pairs - Rose-Hulman
There are two similar functions used to describe the functional form sin(x)/x One is the sinc() function, and the other is the Sa() function We will only use the
[PDF] The Fourier Transform - MSU P-A Welcome Page
Let's define a function F(m) that incorporates both cosine and sine series coefficients, with the sine series distinguished by making it the imaginary component:
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of sine and cosine functions (fourier analysis) ▫ Fourier General form of solution: y=A cos wt+ B sin wt ; ω= k m properties of a signal (fourier transform),
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Table of Fourier Transform Pairs of Energy Signals
Function
nameTime Domain x(t) Frequency Domain X()
FT xt e jtXxtdtxt
F IFT 1 1 e 2 jt xtXdX FXRectangle
Pulse 1 2 0 T t tt rect TT elsewhen sinc 2 T TTriangle
Pulse 1 0 t ttW W W elsewhen 2 sinc 2 W W Sinc Pulse sin() sinc Wt Wt Wt 1 2 rect WWExponen-
tial Pulse 0 at ea 222a a
Gaussian
Pulse 2 2 exp() 2 t 222exp()
2Decaying
Exponen-
tial exp()()Re0atuta 1 aj Sinc 2 Pulse 2 sincBt 2 1 BBRect Pulse
0 0.5 1 1.5 -3-2.5-2-1.5-1-0.500.511.522.53 a r ect a T=1Sinc Pu
lse -0.5 0 0.5 1 1.5 -3-2.5-2-1.5-1-0.500.511.522.53 a Si n c a W=1Gaussian Pulse
0 0.5 1 1.5 -3-2 .5-2-1.5-1-0.500.511.522.53 a 2 =1Triangle Pulse
0 0.5 1 1.5 -3-2.5-2-1.5-1-0.500.511.522.53 a W=1BAF Fall 2002 Page 1 of 4
Table of Fourier Transform Pairs of Power Signals
Function
nameTime Domain x(t) Frequency Domain X()
FT xt e jtXxtdtxt
F IFT 1 1 e 2 jt xtXdX FXImpulse
()t 1 DC 1 2()Cosine
0 cost 00 jj ee Sine 0 sint 00 jj jeeComplex
Exponential
0 expjt 0 2()Unit step
10 00 t ut t 1 jSignum
10 sgn() 10 t t t 2 jLinear
Decay 1 t sgn()jImpulse
Train s n tnT 22k ss k TT