公开(公告)号：US20210013843A1

公开(公告)日：2021-01-14

申请号：US16977566

申请日：2018-03-29

Applicant: Apple Inc.

Inventor： Alon Cohen ,  Ilia Yoffe (Iofedov) ,  Miki Genossar ,  Jeremy Stein

IPC: H03F1/32 ,  H03F3/189 ,  H04B1/40 ,  H03F3/24

Abstract: Systems, methods, and circuitries are disclosed to determine parameters for predistortion circuitry in a transceiver including a transmit chain and a receive chain. In one example, a method includes providing a training signal to a power amplifier on the transmit chain. A separation circuitry is controlled to provide an amplified training signal and a first feedback signal is received from the receive chain. The separation circuitry is controlled to output a modified amplified training signal and a second feedback signal is received from the receive chain. Parameters for the predistortion circuitry are determined based the first feedback signal and the second feedback signal.