function?res?=?OGSBI（paras）

%?res?=?OGSBI（paras）
%?
%?OGSBI（paras）?performs?DOA?estimation?using?Sparse?Bayesian?Inference
%?
%?Input:
%?paras.Y:?M?*?T?matrix?sensor?measurements?at?all?snapshots
%?paras.A:?M?*?N?matrix?columns?are?the?steering?vectors?for?different?directions
%?paras.B:?M?*?N?matrix?columns?are?derivatives?of?the?steering?vectors?wrt.?different?directions
%?paras.sigma2:?initialization?of?noise?variance
%?paras.alpha:?initialization?of?alpha
%?paras.beta:?initialization?of?beta
%?paras.rho:?rho
%?paras.resolution:?grid?resolution?for?the?directions
%?paras.maxiter:?maximum?iteration
%?paras.tol:?stopping?criterion
%?paras.isKnownNoiseVar:?true?if?known?variance?false?if?unknown
%?paras.K:?number?of?sources
%?
%?Output:
%?res.mu:?mean?estimation