mirror of https://github.com/PentHertz/srsLTE.git
20 lines
452 B
Matlab
20 lines
452 B
Matlab
function [ fs, cfo, p_m, w2] = find_pss( x, N_id_2)
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c=lte_pss_zc(N_id_2);
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cc=[zeros(33,1); c; zeros(33,1)];
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ccf=[0; cc(65:128); cc(2:64)];
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ccf=sqrt(128)*conj(ifft(ccf));
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w2=conv(x,ccf);
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[m, fs]=max(abs(w2));
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if (fs > 128 && fs < length(x))
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y=ccf.*x(fs-128:fs-1);
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y0=y(1:64);
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y1=y(65:length(y));
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cfo=angle(conj(sum(y0))*sum(y1))/pi;
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p_m = m/mean(abs(w2));
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end
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end
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