To increase the statistical resolution, we need to simulate ensemble averaging. Compute an for each segment and then average all k of the together. Form from the n -point sample.
Successive rows show increasing while decreases.
The width of a superimposed box roughly gives , and its height roughly gives . The second method is illustrated in Figure 10 . This figure shows a noise burst of 240 points. The spectrum is very rough. However, the first taper takes the autocorrelation width from 480 lags to 120 lags.