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Homework Help: Frequency Response of 3-Point Averaging System

  1. Oct 23, 2008 #1
    1. The problem statement, all variables and given/known data

    y[n]= (x[n]+x[n-1]+x[n-2]) / 3 is the input output relationship

    2. Relevant equations

    Find the Frequency response.

    3. The attempt at a solution

    Ok I am very aware that I can easily find the impulse response and graph this and I can even get the general format for the frequency response, however how doyou figure out the fundamental period? I know its 2pi/T, where T is the fund. period but I dont see how I can graph x[n], y[n], or find the period
  2. jcsd
  3. Oct 23, 2008 #2


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    Staff Emeritus
    Science Advisor
    Homework Helper

    I don't see why you need the fundamental period (whatever that means in this situation). Sounds like they just want the amplitude, and possibly the phase, of the output given a unit-amplitude, sinusoidal input.
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