Extension of generalised subband decomposition-based adaptive FIR structure

An extension of the generalised subband decomposition (GSD)-based adaptive FIR STRucture (GSD-STR) is presented. The system identification is performed through the DFTs of the subband sequences resulting from the decomposition of either the system under modelling or its blocks using an FIR filter bank (FB). Thus, the coefficient solutions are related not only to the system under identification but also to the FB which underlies the proposed STR. For specific values of its parameters the new STR degenerates into the GSD-STR, the transform domain LMS (TD-LMS), or the transversal full-band LMS (FB-LMS) FIR filter.