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How is unit-sample function defined?

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zagor

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Function

how is define unit-sample function?
 

Re: Function

this is discret function and it is define like this:

b[n]={ 0, n not 0
{1, n=0
 

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    zagor

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Re: Function

hey is unit step funcion and unit sample function same???
plz clarify....
 

Function

Unit sample function is also know as Dirack impuls(i hope i write this one right). Unit sample is derive of unit step function. i think
 

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    zagor

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Re: Function

Hi

d u(t)
-------- = Dirac delata
d t

Bye
 

Re: Function

The unit sample is a signal which is zero everywhere except when its argument is zero, then it is equal to 1. Mathematically

unit sample: δ(n)=ì
a)1ifn=0
b)0 otherwise

The unit sample function is very useful in that it can be seen as the elementary constituent in any discrete signal. Let x(n) be a sequence. Then we can express x(n) as follows (using the unit sample definition and the delay operation)
x(n)=∑ (x(k)δ(n−k)) (1)
k=−∞
 

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