1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Express signal in terms of ramp, exponential, and parabolic functions

  1. Aug 6, 2014 #1
    1. The problem statement, all variables and given/known data

    Express the following signal in terms of ramp, exponential, and parabolic functions, where t should be consistently shifted

    2. Relevant equations

    signal simplification techniques, not known to me

    3. The attempt at a solution

    It seems you can express this in terms of step functions too, but not sure.

    x(t) = -4(t + 4)

    x(t) = -4r(t - 1)


    I know you were supposed to have a ramp function here though.
     
  2. jcsd
  3. Aug 7, 2014 #2

    berkeman

    User Avatar

    Staff: Mentor

    What's "the following signal"?

    The 2 equations you wrote look like ramps to me...
     
  4. Aug 7, 2014 #3
    Ugh how did I miss that..

    1. The problem statement, all variables and given/known data

    Express the following signal in terms of ramp, exponential, and parabolic functions, where t should be consistently shifted

    x(t) = -4(t + 4)u(t - 1)
     
  5. Aug 7, 2014 #4

    berkeman

    User Avatar

    Staff: Mentor

    Is u(t) defined somewhere?
     
  6. Aug 7, 2014 #5
    In this problem, I'm not sure. Do you mean the definition of it? It is the integral of the impulse function but not sure how to apply that here.
     
  7. Aug 7, 2014 #6

    berkeman

    User Avatar

    Staff: Mentor

    Oh, the unit step function. Okay, I get it.

    So can you sketch that function okay? It still looks like a ramp function to me then, starting at a particular time t, with a slope and offset. Do you know what the term "consistently shifted" means in the context of this question? I'm not familiar with that terminology.
     
  8. Aug 8, 2014 #7
    You're supposed to change it so that you have "+ 1 " or "-1" somewhere in there that's all I know
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Express signal in terms of ramp, exponential, and parabolic functions
Loading...