Let y = x + n where x and n areindependent zero-mean
gaussian random varibles with differentvariances.
a) plot the correlation coefficientbetween the "observed
signal" y and the "desired signal" x as afunction of the
signal-to-noise ratio
.
b) find the minimum mean squareerror estimator for x in
terms of y. find the mean square error ofthe
estimator.

Girardo is using the model below to solve the equation . girardo uses the following steps: step 1 add 4 negative x-tiles to both sides step 2 add 1 negative unit tile to both sides step 3 the solution is which step could be adjusted so that gerardo's final step results in a positive x-value? in step 1, he should have added 4 positive x-tiles to both sides. in step 1, he should have added 3 negative x-tiles to both sides. in step 2, he should have added 4 negative unit tiles to both sides. in step 2, he should have added 1 positive unit tile to both sides.