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%
function [theta, g, g1, k, h] = ofdm_sync(signal,SNR,FFTSIZE,CPLEN)
rho = SNR/(SNR+1);
d = abs(signal).^2;
g = [ zeros(1,FFTSIZE) signal(1:max(size(signal))-FFTSIZE) ];
g1 = conj(g);
f = abs(g).^2;
c = d + f;
moving_sum_taps = rho/2 * ones(1,CPLEN);
b = conv(c,moving_sum_taps);
b = b(1:max(size(signal)));
%b = b(CPLEN:max(size(b)));
k = g1 .* signal;
moving_sum_taps2 = ones(1, CPLEN);
h = conv(k,moving_sum_taps2);
h = h(1:max(size(signal)));
%h = h(CPLEN:max(size(h)));
a = abs(h);
theta = a-b;
endfunction
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