Page 385 - Fundamentals of Radar Signal Processing

FIGURE 5.21 Ideal Doppler spectrum due to a moving target, sampled at the
Nyquist rate: (a) no window, (b) Hamming window.

If the interpolation procedure is applied to these data, poor results will be
achieved because the assumption that the three points are on a quadratic curve
segment is not valid. For these particular data, the interpolation technique will
estimate the true frequency and amplitude of the spectral peak as 1295.4 Hz and
15.41, respectively. The amplitude estimate is improved only slightly, to a 23

percent error. The frequency error is reduced significantly, to 54.6 Hz, but is