yading@11: function y = genbh92lobe(x) 
yading@11: % Calculate transform of the Blackman-Harris 92dB window 
yading@11: % x: bin positions to compute (real values), y: transform values 
yading@11: N = 512; 
yading@11: f = x*pi*2/N;    % frequency sampling 
yading@11: df = 2*pi/N; 
yading@11: y = zeros(size(x));   % initialize window 
yading@11: consts = [.35875, .48829, .14128, .01168];      % window constants 
yading@11: for m=0:3 
yading@11:     y = y + consts(m+1)/2*(D(f-df*m,N)+D(f+df*m,N));   % sum Dirichlet kernels 
yading@11: end 
yading@11: y = y/N/consts(1);  % normalize 
yading@11: end 
yading@11: function y = D(x,N) 
yading@11: % Calculate rectangular window transform (Dirichlet kernel) 
yading@11: y = sin(N*x/2)./sin(x/2); 
yading@11: y(find(y~=y))=N;    % avoid NaN if x==0 
yading@11: end