Blind Source Extraction

In this paper, we proposed blind source extraction (BSE) technique for signal overlapping problem. The BSE method consists of an additional cascaded nonlinear model, which assists in blind extraction and also reduces the remaining deflation noise. In order to perform simultaneous the nonlinearity estimation and source extraction, a nonlinear cost function is introduced which optimises for both the independence of sources and inverse of the nonlinearity. A rigorous analysis is provided and the existence and uniqueness conditions for the solutions are given. Simulation results are presented which illustrate the validity of the proposed approach.