公开(公告)号：US10075201B1

公开(公告)日：2018-09-11

申请号：US15648205

申请日：2017-07-12

Applicant: Intel IP Corporation

Inventor： Avi Gazneli ,  Michael Kerner ,  Itay Almog ,  Amit Knoll

IPC: H04B1/04 ,  H03F3/24 ,  H03F1/32

CPC classification number: H04B1/0475 ,  H03F1/3247 ,  H03F1/3258 ,  H03F3/195 ,  H03F3/245 ,  H03F2200/294 ,  H03F2200/321 ,  H03F2200/451 ,  H04B2001/0425

Abstract: An adaptive controller for a nonlinear system includes a Volterra filter having a transfer function defined by P coefficients. The controller includes an alignment/compensation circuit, which aligns the input samples to the output samples of the nonlinear system. The controller generates a P×P matrix using at least one of input samples to, or output samples from the nonlinear system and normalizes each element of the P×P matrix using a respective normalization factor. The controller generates and solves a system of P linear equations from the P×P matrix and a P×1 matrix derived from input and output samples of the nonlinear system using Cholesky decomposition that may include Fast Inverse Square Root operations and forward backward elimination to generate P values. The controller multiplies each of the P values by an inverse of a respective one of the normalization factors to generate the P coefficients for the Volterra filter.