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Homework Help: Signals and Systems: Deriving length of discrete convolution signal

  1. Oct 24, 2011 #1
    1. The problem statement, all variables and given/known data
    If a signal f1[n] begins in a moment N1 and ends in moment N2, and signal f2[n] begins in the moment M1, and ends in the moment M2, derive the formula which states in which moment begins and ends the signal f1[n]*f2[n]
    2. Relevant equations
    3. The attempt at a solution

    I haven't got a slightest clue where to begin with this. Can anybody just give me a hint how to derive this? I am trying something with delta functions, but not much luck.
  2. jcsd
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