Hi,

http://upload.wikimedia.org/math/d/d...2f2f619606.png is a signal, and http://upload.wikimedia.org/math/d/3...8c1793a733.png is signal-independent random noise.

I am reading a proof on Wikipedia (link), which says:

What is the equivalent statement of this in terms of http://upload.wikimedia.org/math/d/d...2f2f619606.png and http://upload.wikimedia.org/math/d/3...8c1793a733.png?Quote:

Originally Posted byWikipedia

Thanks.