公开(公告)号：US20230421428A1

公开(公告)日：2023-12-28

申请号：US18338895

申请日：2023-06-21

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Prakhar AGRAWAL ,  Sucheth KUNCHAM

IPC: H04L27/36

CPC classification number: H04L27/364

Abstract: In an example, a system includes a transmitter configured to transmit a quadrature amplitude modulation (QAM) signal, where the QAM signal includes an in-phase (I) chain signal and a quadrature (Q) chain signal. The system includes a receiver configured to receive the QAM signal from the transmitter. The system includes a delay element configured to introduce a phase delay between the transmitter and the receiver. The system includes a controller configured to determine an IQ mismatch (IQMM) of a transmitter-receiver loop without a phase delay, and to determine an IQMM of the transmitter-receiver loop with a phase delay introduced by the delay element. The controller is configured to determine an IQMM of the transmitter based on the IQMM of the transmitter-receiver loop without the phase delay and the IQMM of the transmitter-receiver loop with the phase delay. The controller is configured to correct the IQMM of the transmitter.