Ultra wide band digital pre-distortion
US10063265B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 12, 2016 |
| Grant date | Aug 28, 2018 |
| Priority date | — |
| Expiry date | Oct 12, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2001/0425
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A digital pre-distortion system can inversely model a power amplifier of a system to linearize the transmitter. A complex baseband model for digital pre-distortion based on a narrowband signal assumption is unworkable for an ultra wide band Cable television application. Predistortion can use a true wide band model including real-valued basis terms, obtained from a real-valued signal. When raised to a power, both even and odd harmonics or both odd or even other non-linear terms are represented and negative frequency fold-over can be accounted for. A Hilbert transform can be applied. Compressed sensing can be used to reduce the number of basis terms in the true real wide band model to generate a sparse model. Sparse equalization can be added to improve the stability of the digital pre-distortion system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.