A VHDL implementation of NLMS and RLS adaptive algorithms for acoustic echo cancellation

This paper gives details of our electrical engineering program efforts to introduce software/hardware design concepts and tools in senior-level and senior-design applications. In this paper we present a simple architecture for the very high development language (VHDL) implementation of a variant of RLS algorithm where adaptive filter coefficients and filtering error are both estimated block wise. The performance of the VHDL RLS version, when tested under ModelSim software tools and its fixed point Matlab versions are compared. The obtained results show well the good proposed VHDL version of the RLS algorithm in acoustic echo cancellation application.