Classic Blackman

The so-called ``Blackman Window'' is the specific case in which $\alpha_0 = 0.42$ $\alpha_1 = 0.5$ , and $\alpha_2 = 0.08$

Properties:

• Sidelobes roll off about $18$ dB per octave (as $T\rightarrow 0$ )
• $-58$ dB sidelobe level (worst case)
• One degree of freedom used to increase the roll-off rate from 6 dB/octave to 18 dB per octave
• One degree of freedom used to minimize sidelobes
• One degree of freedom used to scale the window

Matlab:

N = 101; L = 3; No2 = (N-1)/2; n=-No2:No2;
ws = zeros(L,3*N); z = zeros(1,N);
for l=0:L-1
  ws(l+1,:) = [z,cos(l*2*pi*n/N),z];
end
alpha = [0.42,0.5,0.08]; % Classic Blackman
w = alpha * ws;