Waveform generation for improved peak-to-average amplitude ratio
US7627046B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 29, 2005 |
| Grant date | Dec 1, 2009 |
| Priority date | — |
| Expiry date | Dec 7, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L5/0007
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Method and apparatus for peak-to-amplitude ratio reduction are described. A data carrying signal waveform with sub-carrier signals (S1-1 through S1-M) is obtained. An initial peak reduction waveform (S2(m)) is obtained by selection of a portion of the sub-carrier signals (S1-1 through S1-M) for non-data carrying. The initial peak reduction waveform (S2(m)) is refined by at least one recursive iteration which combines the initial peak reduction waveform (S2(m)) with a circularly time-shifted version thereof to obtain a resultant peak reduction waveform having a peak side lobe amplitude less than that of the initial peak reduction waveform (S2(m)).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.