In general, frestimate estimates the frequency response by computing the ratio of the
fast Fourier transforms output signal and the input signal:Resp=FFTyest(t)
FFTuest(t).
- For sinestream input signals, the function discards the data collected during the
specified settling periods of the signal at each frequency. (See “Sinestream Input
Signals” on page 5-37.) If the filtering option of the sinestream signal is active, the
function then applies a bandpass filter to the remaining signal at the corresponding
frequency and discards one more period to remove any remaining transient signals.
The function uses the FFT of the resulting signal to compute Resp. The resulting frd
model contains all frequencies in the sinestream. - For chirp input signals, the function discards any frequencies in the ratio Resp that fall
outside the frequency range specified for the chirp. The resulting frd model contains
all frequencies in the Fourier transform that fall within the chirp range. - For other input signals, the resulting frd contains all the frequencies in the Fourier
transform.
15 Alphabetical List