Linearization of radio frequency transceivers and test systems through dynamic extraction of complex nonlinear models thereof
US10243678B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 11, 2014 |
| Grant date | Mar 26, 2019 |
| Priority date | — |
| Expiry date | Apr 28, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B17/0087
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Dynamic characterization of complex high-order nonlinearity in transmitter (TX) and receiver (RX) signal chains of transceiver systems can be efficiently and accurately performed. A loopback connection may be used to facilitate self-characterization. Appropriate RX and TX configuration settings may be developed to facilitate de-coupling of individual RX and TX nonlinearities from measured cascade nonlinearity. The system's high-order response to a two-tone signal generation may be measured, and complex mathematical analysis may be performed to identify and isolate passband nonlinear components to extract a high-order memory-less model for the system. The extracted system model may be used in the corrective and non-iterative pre-distortion of generated signals and in the post-distortion of received signals to improve linearity performance of the transceiver. The memory-less model and the analytical system are effective in improving performance of class-A-amplifier-based signal chains that are common in test and measurement systems and channel emulation systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.