公开(公告)号：US20170201277A1

公开(公告)日：2017-07-13

申请号：US15471438

申请日：2017-03-28

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Lei WANG ,  Monin Sergey ,  Kuryshev Dmitriy ,  Buzykanov Sergey ,  Yingying Chen

IPC: H04B1/10

CPC classification number: H04B1/10 ,  H04B1/109 ,  H04B1/123 ,  H04L5/14

Abstract: The application discloses a passive inter-modulation PIM interference cancellation method and a related apparatus for a radio frequency module. The digital intermediate frequency unit of the radio frequency module includes: an obtaining subunit, configured to obtain a digital transmit signal from a transmit channel of the radio frequency module; a calculation subunit, configured to perform non-linear transformation on the digital transmit signal to generate a cancellation signal that is used to cancel a PIM component; and a superimposition subunit, configured to superimpose the cancellation signal reversely on a receive channel of the radio frequency module to cancel a PIM component of a receive signal, so as to cancel a PIM component of the radio frequency module to some extent and reduce PIM interference to receiving performance of the radio frequency module.