frankautocorrelation_prop.asv

calculation of the autocorrelation peak sidelobe levels and corsscorrelation. CE sequence, frank aut

clear, close all;
sqL=10;
p=1;
L=sqL^2;
% t=0:(L-1);
S=frank_seq(sqL,L,p);

% plot(t,angle(S));

[x,nfft]=autocorrelationwin(L,S,0);
sfft=fft(S,nfft);
Ac=fftshift(abs(ifft(sfft.* conj(sfft)))/L);


AcSL=[Ac(1:(nfft-1)/2),Ac((nfft+1)/2+1:nfft)];
PSL=20*log10(max(AcSL));
    
F=20*log10( Ac((nfft+1)/2)^2 / sum(AcSL.^2) );

R=20*log10( Ac((nfft+1)/2) )-PSL;

fdT=0;
j=1;
SL=[x(1,1:(nfft-1)/2),x(1,(nfft+1)/2+1:nfft)];

Ffd=20*log10( x(1,(nfft+1)/2)^2/sum(SL.^2) );
while Ffd>3
    fdT=fdT+0.01;
    j=j+1;
    SL=[x(j,1:(nfft-1)/2),x(j,(nfft+1)/2+1:nfft)];
    Ffd=20*log10( x(j,(nfft+1)/2)^2/sum(SL.^2) );
end