公开(公告)号：US20230163798A1

公开(公告)日：2023-05-25

申请号：US18158328

申请日：2023-01-23

Applicant: Analog Devices, Inc.

Inventor： Reza Alavi ,  Adam Ruan ,  Yupeng Liu

IPC: H04B1/16 ,  H04B17/354 ,  H04B1/71

CPC classification number: H04B1/1676 ,  H04B17/354 ,  H04B1/7101

Abstract: The present disclosure provides a method and a system to estimate LO leakage and quadrature error parameters for a transmitter RF front end, such as a direct up-conversion transmitter RF front end, in a joint fashion. The proposed method utilizes a PN sequence inserted at the transmitter baseband. At the observation receiver side, an RX accumulator is implemented to sum receiver signals to take advantage of a despreading gain using the same PN sequence from transmitter side. Through the despreading process, the receiver-transmitter channel may be estimated and used to extract the quadrature error parameters. The estimated channel may also be used to eliminate user data interference presented within the RX accumulator output, which may further be used to compute the LO leakage.