Blind linearization using cross-modulation
US6674335B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 28, 2002 |
| Grant date | Jan 6, 2004 |
| Priority date | — |
| Expiry date | Jun 28, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F1/32
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An amplitude modulated source signal (102) is received, where this signal has a source frequency bandwidth and a source envelope. A dummy envelope is computed that would yield a constant if the dummy envelope and source envelope were to be combined. An amplitude modulated dummy signal (105) is generated, where this dummy signal exhibits the computed, dummy signal envelope and has a prescribed frequency bandwidth different than the source frequency bandwidth. The source and dummy signals are added to form a combined signal (113), which is directed to an input (114a) of a nonlinear circuit (114), that is, one that exhibits amplitude dependent nonlinearity. Signals of the dummy frequency bandwidth and any intermodulation products are filtered from the output, thereby providing a linearized output (118) corresponding to the original, source signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.