jens
7154d5d94e
git-svn-id: http://moon:8086/svn/matlab/trunk@21 801c6759-fa7c-4059-a304-17956f83a07c
26 lines
705 B
Matlab
26 lines
705 B
Matlab
function [omega, err, dmod, omega_coarse, omega_est] = fdet(x, N, Ng, omega_min, omega_step, omega_max)
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%
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% Example: fdet_eval(1200, pi/4, -10, [1100 1350 1])
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K = fix(length(x-Ng)/(N+Ng));
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% Initial guess
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omega_coarse = fdet_coarse(x, N, omega_min, omega_step, omega_max);
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phi_est = 0;
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omega_est = omega_coarse;
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off = 0;
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for k=1:K
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omega(k) = omega_est;
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xp = x((k-1)*(N+Ng)+off+1:k*(N+Ng)+off);
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x_est = exp(-j*(2*pi*omega_est*(0:N-1)' + phi_est));
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dmod(k) = sum(xp(Ng+1:N+Ng).*x_est);
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phi = angle(dmod(k));
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omega_f = phi/N/(2*pi);
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err(k) = omega_f;
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omega_est = omega_est + omega_f;
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dphi_est = 2*pi*mod(omega_est*N, 1);
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phi_est = mod(phi_est + dphi_est, 2*pi);
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end;
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