This paper deals with the multichannel LMS adaptive algorithm.First,a basic model for the multichannel LMS adaptive systems is established,and then, two versions for updating the coefficients of an adaptive filter,the unitedly upd- ating model and the individually updating model,are analyzed.It is shown anal- ytically and by computer simulations that the basic system model proposed is valid, and that the latter updating model has a faster convergence rate over the former updating model.Typical applications ...