Function Approximation Using Symmetric Simplicial Piecewise-Linear Functions

Abstract

Symmetric Simplicial (SS) PWL functions can be used to implement nonlinear functions with high power and area efficiency in VLSI architectures. However, they have a representation limitation, since they can only implement symmetric functions. In this paper we propose a method to achieve generic piecewise-linear (PWL) functions in an efficient way, no limited to symmetrical functions, by using a combination of Symmetric Simplicial (SS) PWL functions. We present preliminary results in 2 and 3-dimensional domains.