Bayesian Approach How about:the unknown is a random variable 0 If the information about the rV is known,the estimator do better? Example:Estimating DC in WGN cn =A+wln whxiong@uestc.edu.cn 3whxiong@uestc.edu.cn 3 Bayesian Approach How about: the unknown is a random variable If the information about the RV is known, the estimator do better? Example: Estimating DC in WGN x[n] = A + w[n]