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Suppose that a signal s that takes on values 1 and -1, with probability p and...

Suppose that a signal s that takes on values 1 and -1, with probability p and 1-p respectively, is sent from location A. The signal received at location B is Normally distributed with parameters (s, 2). Find the best estimate of the signal sent, in the meansquare-error sense, if R, the value received at location B, is equal to r.

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