How is unit-sample function defined?

[zagor]

Function

how is define unit-sample function?

 

[manipulator83]

Re: Function

this is discret function and it is define like this:

b[n]={ 0, n not 0
{1, n=0

 

[knmaheshy2k]

Re: Function

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

 

[manipulator83]

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

 

[hamidr_karami]

Re: Function

Hi

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

Bye

 

[eogotenks]

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=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 be a sequence. Then we can express x as follows (using the unit sample definition and the delay operation)
x=∑ (x(k)δ(n−k)) (1)
k=−∞