In order to find a peak or max response in the fourier domain as in the spatial domain, I have been studying bartlett's method, welch's method, and the blackman-tukey method for more accurate power spectrum analysis after correlating two functions together in the fourier domain as depicted in this document.
But I had a few questions after reading, which I could not find in any book nor online
1) For the Bartlett method (page 11 of the pdf) what determines the value of k, or is it arbitraty. And following that, does the accuracy of the power spectrum analysis go up if k is higher, and vice versa
2) Same question as 1) but for the welch method (page 12 of the pdf)
3) For the blackman-tukey method (page 14 of the pdf), will i get the same result if I window the signal in the spatial domain, but then do the autocorrelation in the fourier domain?