Estimating and correcting transmitter local oscillator leakage in loopback path
US12294398B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 27, 2023 |
| Grant date | May 6, 2025 |
| Priority date | — |
| Expiry date | Nov 8, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03D2200/0019
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In an example, a system includes a receiver configured to receive a differential input signal from a quadrature amplitude modulation (QAM) transmitter at a differential interface that includes a first input and a second input. The system also includes a first switch coupled to the first input and a second switch coupled to the second input, where the first switch and second switch are configured to couple the first input and the second input to a complex mixer in a non-inverting configuration. The system includes a third switch coupled to the first input and a fourth switch coupled to the second input, where the third switch and the fourth switch are configured to couple the first input and the second input to the complex mixer in an inverting configuration. The complex mixer is configured to produce an output signal based on the non-inverting configuration and the inverting configuration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.