All digital transmitter noise correction
US9048900B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 12, 2013 |
| Grant date | Jun 2, 2015 |
| Priority date | — |
| Expiry date | Mar 12, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L5/1461
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An all digital model of nonlinear transmitter signal distortion in signals received at a receiver of a transmitter-receiver may be used to estimate distortion. The estimated distortion may then be cancelled from the received signals to improve signal quality of the received signal. The digital nonlinear model may be part of an estimator circuit that estimates nonlinear distortion terms by applying a formula or transformation to a digitized version of the signals transmitter at a transmitter of the transmitter-receiver. A mixer may be used to shift a frequency of the estimated nonlinear terms away from a transmitter frequency so that the nonlinear terms can later be subtracted from the incoming signal received at the receiver at a receiver frequency. Circuits and methods are provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.