Discrete-Time Systems. Examples M-point moving-average system vn- 1 M M ∑x[n-k k=0 Used in smoothing random variations in data An application in denoising: Consider x团n]=s[n]+an], where sin is the signal corrupted by a noise dn Copyright C 2001, S K MitraCopyright © 2001, S. K. Mitra 5 Discrete-Time Systems:Examples • M-point moving-average system - • Used in smoothing random variations in data • An application in denoising: Consider x[n] = s[n] + d[n], where s[n] is the signal corrupted by a noise d[n] =  − − = 1 0 [ ] 1 [ ] M k x n k M y n