公开(公告)号：US10033427B2

公开(公告)日：2018-07-24

申请号：US14737191

申请日：2015-06-11

Applicant: Texas Instruments Incorporated

Inventor： Hunsoo Choo ,  Nikolaus Klemmer ,  Jaiminkumar Mehta

IPC: H04B1/46 ,  H04B1/525 ,  H03D3/00 ,  H04B1/30

Abstract: A system for reducing a local oscillator leakage component. The system includes a transmitter channel to transmit data modulated using a transmitter local oscillator frequency. A transmitted signal includes a transmitter local oscillator leakage component. The system also includes a receiver channel to receive the transmitted signal using a receiver local oscillator signal having a frequency offset from the transmitter local oscillator frequency. The received signal includes the transmitter local oscillator leakage component isolated from one or more receiver impairments. The system further includes a feedback loop from the receiver channel to the transmitter channel to identify a power of the isolated transmitter local oscillator leakage component and to generate a local oscillator leakage cancellation signal based on the identified power.