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when a Hamming window is used. The worst-case amplitude error with the
oversampled spectrum using K = 64 is reduced to 0.17 dB without a window
and only 0.05 dB with the Hamming window.
FIGURE 5.23 Noise-free amplitude estimation performance of quadratic
interpolator M = 30. (a) Minimally sampled case (K = 30), (b) oversampled
case (K = 64).
