Page 291 - Fundamentals of Radar Signal Processing

are on the same normalized frequency scale. Comparing the spectra of these two

waveforms illustrates how the nonlinear term has spread and tapered the LFM
spectrum to lower the matched filter sidelobes. The LFM matched filter output
has a peak sidelobe of –13.5 dB, decaying approximately as 1/F at higher
frequencies. The Rayleigh resolution in time of the NLFM waveform is
approximately 0.8/β , less than the 1/β value observed for the LFM case but
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greater than 1/(β + β ).
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