Distortion detection with multiple antennas
US12040843B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 17, 2019 |
| Grant date | Jul 16, 2024 |
| Priority date | — |
| Expiry date | Apr 7, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B17/29
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method in a network node and an apparatus for determining passive intermodulation (PIM) characteristics at the network node are provided. According to one aspect, a method includes capturing signals from each of at least one antenna port at a first time and a second time. The method includes determining a first covariance matrix based on signals captured at the first time. The method also includes determining a second covariance matrix based on signals captured at the second time. The method further includes determining a difference matrix, the difference matrix being based on a difference between the first and second covariance matrices, the difference matrix corresponding to changes in PIM between the first time and the second time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.