Method and apparatus for successive order nonlinear passive intermodulation distortion cancellation
US10230550B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 18, 2016 |
| Grant date | Mar 12, 2019 |
| Priority date | — |
| Expiry date | Nov 18, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/0252
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.