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I didn't get what's the procedure here.
Is it \[{{S}_{1}}^{2} + {{S }_{2 }}^{2} + ... + {{ S}_{N }}^{2}\] or \[{({S }_{1 } + {S }_{2 } + ... + { S}_{ N})}^{2}\]?
I guess it's not the first, i did some experiments on mathematica and the \[{\sigma }^{2 }\] is different from total.
I imagined something like this, but i wasn't sure. If i sum the noisy signal, it's going to be equal to the power of this sum and not equal to the sum of the signal? 8-O
I am reading The Scientist and Engineer's Guide to Digital Signal Processing
Here, he says:
As a starting point, the expression,|xi-μ|, describes how far the ith sample deviates (differs) from the mean. The average deviation of a signal is found by summing the deviations of all the individual...
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