公开(公告)号：US12212353B2

公开(公告)日：2025-01-28

申请号：US18351623

申请日：2023-07-13

Applicant: Nokia Solutions and Networks Oy

Inventor： Chad Young ,  Tian He ,  Shavantha Kularatna ,  Peter Novak ,  Jacob Edward Longwell

IPC: H04B1/04 ,  H03F1/32

Abstract: As solution for predistorting a signal is presented. The solution comprises receiving (600) as an input a signal comprising at least two signal components on a different band, sampling (602) the input signal comprising linear terms, composite non-linear terms causing intermodulation outside Nyquist band of the input signal and further non-linear terms causing intermodulation inside the Nyquist band, the further non-linear terms comprising multi-band terms. Oversampling (604) by a given factor is applied to the signal in a first predistortion circuit for processing the linear terms and composite non-linear terms causing intermodulation outside Nyquist band; processing (606) the input signal without oversampling in a second predistortion circuit in parallel with the first predistortion circuit for the further non-linear terms. The rates of the output signals of the predistortion circuits are matched (608), combined and filtered (610).