More General FIR Filter DesignWe have looked at more than just FIR filter design by the window method and frequency-sampling technique. The general steps were
- Prepare a desired frequency-response that ``seems achievable''
- Inverse FFT
- Window the result (time-limit it)
- FFT that to see how it looks
Comparison to Optimal Chebyshev FIR Filter
Filtering and Windowing the Ideal Hilbert-Transform Impulse Response