Invention Grant
- Patent Title: Method and apparatus for successive order nonlinear passive intermodulation distortion cancellation
-
Application No.: US15759497Application Date: 2016-11-18
-
Publication No.: US10230550B2Publication Date: 2019-03-12
- Inventor: Khalid W. Al-Mufti , Thomas B. Gravely , Ariful Hannan
- Applicant: CommScope Technologies LLC
- Applicant Address: US NC Hickory
- Assignee: CommScope Technologies LLC
- Current Assignee: CommScope Technologies LLC
- Current Assignee Address: US NC Hickory
- Agency: Fogg & Powers LLC
- International Application: PCT/US2016/062817 WO 20161118
- International Announcement: WO2017/091468 WO 20170601
- Main IPC: H04L25/02
- IPC: H04L25/02 ; H04L25/03 ; H04B1/10

Abstract:
A method for diminishing passive intermodulation (PIM) is provided. The method comprises: upsampling an uplink baseband modulated signal; upsampling a downlink baseband modulated signal; determining a time delay for the upsampled downlink baseband modulated signal; time delaying the upsampled downlink baseband modulated signal by the determined time delay; estimating a third order PIM distortion (PIMD) product by filtering the time delayed, upsampled downlink baseband modulated signal with a third order power series kernel; generating a first filtered signal by subtracting the estimated third order PIMD product from the upsampled downlink baseband modulated signal; estimating a Nth order PIMD product by filtering the time delayed, upsampled downlink baseband modulated signal with a Nth order power series kernel; generating a nth filtered signal by subtracting the estimated Nth order PIMD product from the n−1th filtered signal; and downsampling the nth filtered signal.
Public/Granted literature
- US20180262370A1 METHOD AND APPARATUS FOR SUCCESSIVE ORDER NONLINEAR PASSIVE INTERMODULATION DISTORTION CANCELLATION Public/Granted day:2018-09-13
Information query