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5 distinctions between CT and DT dignal

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altofame

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5 distinctions between CT and DT signal

Hi
I need help with my homework in Signals and Systems
I was told to list 5 distinctions between CT and DT signals
and all I can think of is that DT input is a subset of I (as integers) and CT input is a subset of R (as real values).

Anyone can come up with more?
Thanks to all replies in advance.

cheers

---------- Post added at 21:31 ---------- Previous post was at 20:50 ----------

came up with another one,
compressing/expanding CT will give an identical graph but, doing so on DT may result in lost signal.
 
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CT time signals are signals which vary with both time and amplitude.DT must have discrete time.Remember DT can have continuous and discrete amplitude also.If both amplitude and time are discrete its a digital signal,present day technology.
 

Analogue Signals :

A signal whose Amplitude can take any value in a continuous range , e.g

0,0.5,1,2,2.5 etc.

Digital Signals :

A signal whose Amplitude can take only finite number of values , e.g

0,1,2,3,5,6, etc. not decimal values

Continuous Time :

Values in time domain also include from integers.

Descrete Time :

Values in time domain belongs to Real number.

Continuous time Descrete Signals :

Time domain from Integers and Amplitude from Real set of values

Descrete time Continuous Signals :

Time domain from Real set of values and Amplitude from Integers set of values.

------------------------------------------------------------------------------------------
 

Due to its continuous nature CT has infinite resolution, where DT has finite resolution due to quantization.
 

you can check OPPENHEIM -WILLSKY-NAWAB "SIGNALS &SYSTEMS" ,which clearifies you difference between CT and DT signals
 

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