Programmable digital loopback for RF applications
US11057125B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 25, 2020 |
| Grant date | Jul 6, 2021 |
| Priority date | — |
| Expiry date | Jun 25, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B17/19
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Various approaches to implementing digital loopback in a radio frequency (RF) system are disclosed. An example RF system includes a receiver that includes an ADC and a transmitter that includes a DAC. The apparatus includes multiple digital loopback circuits provided at different points between the digital domain processing of the receiver and the transmitter. Each digital loopback circuit may include a combiner and one or more weighing circuits, which make the circuit programmable. The combiner of a given digital loopback circuit is configured to combine a RX signal and a TX signal at a particular point of the digital domain processing of the receiver and the transmitter where said digital loopback circuit is implemented. The one or more weighting circuits are configured to define the how much of the TX signal and/or RX signal is used for said combination.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.