Apparatus and method for generating a multicarrier communication signal having a reduced crest factor
US8259846B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 30, 2008 |
| Grant date | Sep 4, 2012 |
| Priority date | — |
| Expiry date | Dec 11, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2614
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An apparatus for generating a multicarrier communication signal having a reduced crest factor enables efficient power amplifier operation. The apparatus includes a plurality of shaping filters (205-n) for outputting a plurality of shaped baseband transmission signals. A plurality of mixers (210-n) then multiplies each signal by one of a plurality of complex carrier signals. A window function generator (235) generates a clipping window signal based on power levels of the unshaped baseband transmission signals. A plurality of window output units (245-n) outputs a plurality of subtraction-based clipping window signals. At least one summing unit (260) then generates the multicarrier communication signal having the reduced crest factor from the plurality of subtraction-based clipping window signals and the plurality of shaped baseband transmission signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.