Low peak-to-average power ratio (PAPR) preamble for orthogonal frequency division multiplexing (OFDM) communications
US8165232B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 1, 2008 |
| Grant date | Apr 24, 2012 |
| Priority date | — |
| Expiry date | Dec 5, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/262
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A communications device includes communications data and a training sequence corresponding to a preamble. A modulation and mapping circuit modulates the communications data and training sequence into a plurality of multiple subcarriers that are orthogonal to each other to form an orthogonal frequency division multiplexing (OFDM) communications signal having modulated subcarriers carrying the communications data forming a data payload and modulated subcarriers forming the preamble. The modulation and mapping circuit applies a quadratic modulation to the subcarriers carrying the training sequences to produce a low peak-to-average power (PAPR) preamble of approximately 2.6 decibels (dB) independent of the number of subcarriers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.