Difference between DFT and DTFT

[bilalkadri]

Can someone explain me the difference between Discrete Time Fourier Transform (DTFT) and Discrete Fourier Transform (DFT)?

 

[berko3000]

dft vs dtft

In DTFT freq is continuous but in DFT frequency becomes discrete.

 

[kali]

difference between dtft and dft

Hi friend,

Read about this here **broken link removed**

kali

 

[nj_jack]

dtft vs dft

you can refer this paper.

 

[HSAMS]

dft and dtft

I think you should read "Understanding DSP" that has on eda.DTFT actually a transform with frequency continous but dicrete-time and DFT is quantized both frequency and time.

 

[michaelguo]

dft dtft

there is a free encyclopedia.
http://en.wikipedia.org/wiki/Discrete_Fourier_transform
you can see the dft or more

Discrete-Time Fourier Transform (DTFT)
By: Don Johnson
**broken link removed**
more detail information

Added after 7 minutes:

Discrete-Time Fourier Transform (DTFT)
By: Don Johnson
h**p://cnx.rice.edu/content/m10247/latest/
more detail information
I found the pdf doc.

 

[DrDolittle]

dtft and dft

A discrete fourier transform doesn't discretize the time domain,on the other hand a discrete time fourier tranform discretize the time domain as well.

Regards
drdolittle

 

[pimr]

dtft dft

I think both of them discretize time domain as DFT is sampled version of DTFT.
DTFT is continuous in "frequency" but discrete in time and DFT is discrete in both time as well as frequency.
pimr

 

[HSAMS]

dft vs. dtft

That't right ! I agree with you,pimr.If DFT isn't discretize time domain,we can't use computer to calculate DFT,because with DFT we use signal-sampled,it means discretize signal in time-domain

 

[david753]

dtft dft difference

In DTFT, time domain sampling data is multiply by e^-j2*pi*f*n, then summation.
But, in DTF, time domain sampling data is multiply by e^-j2*pi*n*k/N, then summation.
why it divids by N in DTF, comparing to DTFT?