Patent ID: 9225501
Filing Date: 2015-12-29
Classification: G06F,H04B,H04J,H04L

Abstract:
1. A digital pre-distortion (DPD) system, comprising: a digital signal processor configured to evaluate a non-linear function for a complex input value, comprising: a memory configured to store at least one look-up table with polynomial interpolation that represents said non-linear function, wherein entries in said look-up table comprise polynomial coefficients of at least degree two for different segments of said non-linear function, said polynomial coefficients configured to provide at least one of a rectangular or triangular basis function for each segment of said non-linear function; at least one processor, coupled to the memory, operative to: obtain a point from said look-tip table that is near a magnitude of said complex input value; and generate a complex output value by evaluating said polynomial coefficients at said point to perform a Taylor Series expansion from said point.