公开(公告)号：US10601455B2

公开(公告)日：2020-03-24

申请号：US16212191

申请日：2018-12-06

Applicant: AceAxis Limited

Inventor： David Damian Bevan ,  Fiona Wilson ,  Simon Gale

IPC: H04L1/02 ,  H04B1/10 ,  H04B1/12 ,  H04B17/391 ,  H04B7/0426 ,  H04J11/00 ,  H04B7/08

Abstract: Methods and apparatus are disclosed for processing interference due to passive non-linear products of transmitted signals in a wireless network, and more specifically, but not exclusively, to reduction of interference caused to a receiver due to passive intermodulation (PIM) products generated from at least a first Multiple Input Multiple Output (MIMO) signal comprising first and second MIMO component streams at a first carrier frequency. In other scenarios, there may be two or more carrier frequencies combining to cause PIM, and each carrier frequency may have two or more MIMO component streams.

公开(公告)号：US10237109B2

公开(公告)日：2019-03-19

申请号：US15485083

申请日：2017-04-11

Applicant: AceAxis Limited

Inventor： Fiona Wilson ,  Simon Gale ,  David Damian Bevan

IPC: H04L27/26 ,  H04L25/02 ,  H04B1/12

Abstract: Interference (I1, I2) is mitigated in a waveform received at the input of a receiver in a wireless network, the interference comprising passive intermodulation PIM products of at least a first signal (C1). A first stream of time samples (5) is generated of a simulated first PFM product of at least the first signal (C1), and a second stream of time samples (6) is generated of the simulated first PIM product. The second stream has a delay with respect to the first stream. A replica (8) is generated of the interference by processing (7) at least the first stream and the second stream, the processing comprising reducing a degree of correlation between the first stream and the second stream, and the replica of the interference is combined with a stream of time samples of the received waveform (40) to reduce the interference in the received waveform.