The Chebyshev window minimizes the mainlobe width, given a particular sidelobe height. It is characterized by an equiripple behavior. Its sidelobes all have the same height.
Generate and display a 50-point Chebyshev window with a sidelobe attenuation of 40 dB.
w = chebwin(50,40); wvtool(w)
As shown in the time-domain plot, the Chebyshev window has large spikes at its outer samples.