Hardware realization of fuzzy adaptive filters for non linear channel equalization

The article presents the architectural proposal and hardware implementation of two fuzzy adaptive filters, which are intended to perform real time non linear channel equalization. The proposed architecture considers on-line adaptation of Gaussian membership functions. The key point of the architecture is a circuit that generates Gaussian membership functions. Taking into account the proposed architecture, two first order fuzzy adaptive filters are implemented over field programmable gate array technology. These implementations are compared with their software counterparts in terms of processing speed and bit error rate performance.