Methods and apparatus for duplexing signals
US10680724B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 30, 2019 |
| Grant date | Jun 9, 2020 |
| Priority date | — |
| Expiry date | Jan 30, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/582
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A duplexing apparatus comprises a reference of impedance settings and corresponding calibration measurements. A controller is arranged to set a variable impedance to a first impedance setting and transmit a first transmit signal at a first transmit frequency and measure a resulting first signal at an output node of a hybrid circuit. The controller then selects a second impedance setting, transmits a second transmit signal at a second transmit frequency and measures a resulting second signal at the output node. The controller then determines a balancing result using a system of equations associating the first and second measured signals, and first and second calibration measurements from the reference in respect of the first and second impedance settings, respectively. A third impedance setting is retrieved from the reference by reference to the balancing result to provide isolation of an input node from the output node of the hybrid circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.