Patent ID: 8804872
Filing Date: 2014-08-12
Classification: H04L

Abstract:
1. A method of Digital Pre Distortion (DPD) comprising the steps of: modeling the non linear behavior of a power amplifier by using Volterra Kernel series with memory effects: where: y[n] is the power amplifier output at sampling time n, x[n] is PA input at sampling time n; U l (x[n]) is general Volterra kernel with memory effects expressed in apolynomial form; and w l is a corresponding coefficient; searching for the dominant Volterra Kernel with the minimum residue error by letting x[n] be the first new build orthogonal base e where: <x,y> denotes x and y cross-correlation, where: Volterra Kernels Candidate is {U continuously updating the digital pre distortion process with the optimal Volterra Kernel set.