Modulated signal transmission system compensated for nonlinear and linear distortion
US5339054A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 1, 1993 |
| Grant date | Aug 16, 1994 |
| Priority date | — |
| Expiry date | Jul 1, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/368
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In a modulated signal transmission system operable in response to an input digital signal of a baseband to produce a modulated signal through a nonlinear amplifier, a nonlinear converter is controlled by a control signal generator to compensate for not only a nonlinear distortion but also a linear distortion. The control signal generator is given a difference signal between a linearly detected signal and the input digital signal to which an estimated linear distortion is added by a linear filter having filter coefficients controlled by a filter coefficient estimator. An additional nonlinear converter is located prior to the linear filter. Alternatively, the linear filter may be located after the nonlinear converter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.