Present Situation and Development of Blind Signal Separation Technology

BSS(blind signal separation) technolog,as a research field rapidlly developed during the 1990s,is used to estimate or separate the source signal only from with the observed signal.This paper describes first the basic concepts and its development history of BBS,and then expounds the BSS’s math models containing linear instant model,linear convolutive model and nonlinear model,then further sums up the blind signal separation method for positive,definite signals,underdetermined signals and single-channel mixed signal,outlines the principle and characteristics of the hot methods.Finally,the challenges,trends and applications of the blind signal separation are forecasted.