Passive intermodulation reduction with frequency shifting
US11025464B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 2, 2020 |
| Grant date | Jun 1, 2021 |
| Priority date | — |
| Expiry date | Jun 2, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/022
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A system for reducing or eliminating PIM interference in an RX signal is disclosed. The system is configured to use RX and TX signals to generate a frequency-shifted output that includes a RX carrier signal component of the RX signal, as well as first and second TX carrier signal components of the TX signal, positioned in a frequency spectrum so that a frequency spacing between the first and the second TX carrier signal components and a frequency spacing between the RX carrier signal component and a closest one of the first and the TX second carrier signal components is smaller than a frequency spacing between the first and the second TX carrier signal components in the TX signal. The system may then use the frequency-shifted output to generate an estimate of a PIM signal component in the RX signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.