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Posted: September 02, 2009 10:40 am
Member No.: 25,489
Joined: August 03, 2009
I have a problem regarding 2 signals and the depicting of these:
x[n] = (1/2)^n u[n]
x(t) = 2u(t-1)-u(t-3)+δ(t+1)
i would like to sketch x[n] and x(t)
u[n] i think represent a unit step, which = is defined as 0 fo t ,0 and 1 for t>0.
δ = impuls which is 1 for t=0 and else 0.
how do i approach this problem? Must i divide the sum into seperate functions? Odd and even functions?
Please let me know.
Posted: September 15, 2009 09:34 am
Member No.: 25,915
Joined: August 28, 2009
the first function is a digital function
plotit by obtaining different values of n
the second is continuous ,
make cases for unit step functions , and delta function is at -1 , represent it with a line at y axis with arrow
Posted: October 15, 2009 09:31 am
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Group: Trusted Members
Member No.: 6,649
Joined: October 07, 2006
This is an old topic, but yes - drawing the unit step and delta functions out separately helps to grasp the sketching process.
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