Table 1. Major MATLAB functions used in the simulation.

Functions	Content
awgn(m,n,power)	Create white noise
sgolayfilt(x,order,framelen)	Savizky-Golay filter using cubic (3 order) 49 points
fft(X,n)	Fourier transform
ifourier(F,transVar)	Inverse Fourier transform
power=Y.*conj(Y)	Power spectrum
auto_y=real(ifft(power));auto_y = auto_y./max(auto_y);	Autocorrelation is defined as the product of the shifted amount
zeroCross=auto_y(1:end-1).*auto_y(2:end) < 0;	Get the zero cross point
SNR = snr(y);	Calculate the signal S/N