function [h0,h1] = coeff_2(k)
if k == 0
   A = 1/4*2^(1/2);
elseif k == 1
   A = -1/4*2^(1/2);
end
h0 = [1 0 1 0 0 0 0 0]'/sqrt(2);
h1 = [-A 1/2 A 1 A 1/2 -A 0]'/sqrt(2);

