tools / fft-windowing

Appendix B — FFT windowing

Window functions and the resolution–leakage tradeoff. All figures below are derived live from the DTFT of the selected window.

Derived figures
Mainlobe width (−3 dB) 1.31 bins
Peak sidelobe level −42.4 dB
Scalloping loss −1.72 dB
−8−6−4−2024680−20−40−60−80−100frequency offset — DFT binsdBPSL −42.4 dB −8−40480−40−80
Fig. B.1 — |W(f)| normalized to 0 dB peak; horizontal axis in DFT bins. Dashed guide marks the peak sidelobe.
Fig. B.1 — |W(f)|, dB vs DFT bins.