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Signal processing in matlab, what is signal length ?

  1. Jan 16, 2015 #1
    1. The problem statement, all variables and given/known data

    Use Matlab to construct a signal of length 2^13 = 8192 that contains only three frequencies:

    x=0.5*sin(2*pi*200*t)+0.2*sin(2*pi*455*t)-0.3*sin(2*pi*672*t)

    Compute and plot the absolute value of the DFT.

    What does the question mean by signal length and why is it expressed in powers of 2 ? x is clearly my signal but how do i define its length ?

    Thanks
     
  2. jcsd
  3. Jan 16, 2015 #2

    NascentOxygen

    User Avatar

    Staff: Mentor

    I would think it couldn't mean anything other than the number of samples in the period of that complex waveform. Does that make sense?

    I don't know (i.e. remember) Matlab.
     
  4. Jan 17, 2015 #3
    thanks, anyone have any idea how i give my signal this length ?
     
    Last edited: Jan 17, 2015
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