Method and apparatus for reducing peak to average power ratio of a multi-carrier signal
US7266156B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 26, 2002 |
| Grant date | Sep 4, 2007 |
| Priority date | — |
| Expiry date | Sep 15, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L5/0048
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An apparatus and method provide for producing a multi-carrier signal at a reduced peak to average power ratio. A control system (401) determines a number of carriers in multi-carrier signal, determines chip time of a spreading sequence used for spreading the number of carriers and determines delay time for each of the number of carriers based on the determined number of carriers and the determined chip time. Delay blocks (512B, 512C) delay the number of carriers by the determined delay time. A combiner (502) combines the delayed carriers to produce a reduced peak to average power ratio multi-carrier signal (504). A transmitter (500) transmits the reduced peak to average power ratio multi-carrier signal (504). The transmitter (500) may include an amplifier (520) for amplifying the reduced peak to average power ratio multi-carrier signal (504) before transmitting.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.