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SNR calculation help needed

  1. Mar 20, 2013 #1

    I have a vector 'A' of length 'n', whose values change with time. 'A' gives the change from a baseline 'B'. I calculate a signal as the distance A from the average of B, i.e.,

    If 'B' is my baseline, then the signal at a time 't' due to A(t) would be given by S=(1/n)*(Ʃ1Ai -<B> - Ʃ2Ai -<B>), i=1 to n. 'A' is divided into two groups of elements whose values are higher than their previous values and those whose values are lower.

    I define noise as the standard deviation of S.

    Given this, how do I define the signal-to-noise ratio of A?

    I found different ways of calculating the SNR in different contexts, but am not very clear as to which one to use in this context.

    Thanks in advance for any suggestions/help.
  2. jcsd
  3. Mar 21, 2013 #2


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    Staff: Mentor

    Dividing S by the standard deviation of S should give a meaningful quantity, if the formula for S itself is meaningful (it has missing brackets here, by the way).
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