Modified active-set approach for Peak-to-Average power ratio reduction via reservation tone
US8170140B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 24, 2008 |
| Grant date | May 1, 2012 |
| Priority date | — |
| Expiry date | Mar 3, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2614
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An active-set PAR reduction method has low computation cost and delay. Peak canceling, by adding up the original signal and the peak canceling signal, is done only after the final peak canceling signal that can reduce all peaks of the resultant signal below the desired peak level is generated with an iterative method or a maximum iteration is reached. The PAR reduction method cancels the high computation cost for accumulating the peak-canceling effort into each sample every iteration. In the i-th iteration, the method attempts to resolve an intermediate peak canceling signal that can reduce the i peaks of the resultant signal to the desired peak level. The method only calculates the samples of the intermediate peak canceling signal and performs balance testing in some locations where the peak level of the original signal is larger than a selected threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.