I am trying to understand the basics of the cross/auto-correlation if the noisy signal $y(t)$ which is received from the channel at the receiver. Here at receiver we want to estimate the noise in the received signal and then get a clear signal of $y(t)$.
My questions are below:
- How autocorrelation or cross-correlation is performed for this $y(t)$ signal? And what does tell us from the correlation function?
- What does the Fourier Transform of the correlation function say about the noisy signal?
Thanks in advance!