Howtosignalprocessing
- What is the effect of interpolation on filter design?
- What is interpolation in time domain?
- What is FFT interpolation?
- What is the effect of zero padding in frequency domain?
What is the effect of interpolation on filter design?
The interpolation filter then uses the lowpass FIR filter H(z) to remove the images. Therefore, this lowpass FIR filter is an anti-imaging filter. The interpolation filter then returns an output signal y(n) with the new sampling frequency.
What is interpolation in time domain?
Interpolation by digital computer provides an alternative to the phase-locked frequency multiplier for the calculation of the time domain average of gear vibration signals. Higher-order interpolation techniques produce flatter passbands and lower sidelobes in the stopband but require longer calculation times.
What is FFT interpolation?
FFT interpolation is based on adding zeros at higher frequencies of the Fourier coefficient vector. In such way, the inverse FFT will produce more output, using the same non-zero Fourier coefficients.
What is the effect of zero padding in frequency domain?
In this case, we can say “zero padding in the frequency domain results in an increased sampling rate in the time domain”.
