公开(公告)号：US20250125832A1

公开(公告)日：2025-04-17

申请号：US18484809

申请日：2023-10-11

Applicant: Hong Kong Applied Science And Technology Research Institute Co., Ltd.

Inventor： Hong Hu ,  Jianping Zheng ,  Xiangyu Liu ,  Yuxian Zhang

IPC: H04B1/525 ,  H04B1/48

Abstract: A method of estimating local oscillator leakage (LOL) for a radio frequency (RF) signal transmitter. The method comprises generating a transmitter wideband baseband signal (s(t)) with a direct current (DC) voltage element of the transmitter wideband baseband signal (s(t)) removed or blocked and an average of the transmitter wideband baseband signal (s(t)) set to zero. The method includes processing said transmitter wideband baseband signal (s(t)) to form a RF signal; processing the RF signal to obtain a receiver baseband signal (y(t)); and determining a magnitude of an average of the receiver baseband signal (y(t)) as comprising a magnitude of the transmitter DC offset.