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- % Impulse response of raised-cosine filter
- function y = nyqro(alpha, x)
- si = sinc(x);
- a = pi * x;
- b = alpha * a;
- c = x .^ 2;
- d = 1 - (4*alpha*alpha*c);
- pole = find(abs(d) < 0.001);
- d(pole) = ones(size(pole));
- y = si .* cos(b) ./ d;
- a = pi * x(pole);
- b = alpha * a;
- c = x(pole) .^2;
- d = 1 - (12*alpha*alpha*c);
- y(pole) = (-sin(a) .* sin(b) .*alpha ) ./ d;
- clear si a b c d pole;