公开(公告)号：US10063265B2

公开(公告)日：2018-08-28

申请号：US15291898

申请日：2016-10-12

Applicant: Analog Devices Global

Inventor： Patrick Pratt ,  Claire Masterson ,  Justine Mary McCormack

IPC: H04B1/04 ,  H04L27/36 ,  H04B1/7163 ,  H03F1/32

CPC classification number: H04B1/0475 ,  H03F1/3247 ,  H03F1/3258 ,  H04B1/71635 ,  H04B2001/0425 ,  H04L27/368

Abstract: A digital pre-distortion system can inversely model a power amplifier of a system to linearize the transmitter. A complex baseband model for digital pre-distortion based on a narrowband signal assumption is unworkable for an ultra wide band Cable television application. Predistortion can use a true wide band model including real-valued basis terms, obtained from a real-valued signal. When raised to a power, both even and odd harmonics or both odd or even other non-linear terms are represented and negative frequency fold-over can be accounted for. A Hilbert transform can be applied. Compressed sensing can be used to reduce the number of basis terms in the true real wide band model to generate a sparse model. Sparse equalization can be added to improve the stability of the digital pre-distortion system.