Orthogonal division multiple access technique incorporating single carrier and OFDM signals
US7295626B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 8, 2002 |
| Grant date | Nov 13, 2007 |
| Priority date | — |
| Expiry date | Sep 11, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L5/023
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A multiple access technique is described, which is capable of maintaining orthogonality between transmitted signals in multipath conditions, even when part of or all of the transmitted signals belong to the family of Single Carrier modulation. The Single Carrier signals are converted into multicarrier signals which utilize just a fraction of the spectral lines by transmitting each fragment of data several times. The orthogonal multiplexing technique enables transmitters to enjoy both the advantages of OFDMA, such as noninterference between signals, adaptive bandwidth allocation and wideband diversity, and the Peak-to-Average Power Ratio advantage of the single carrier modulation. The multiplexing technique described allows to incorporate in the same multiple access system both OFDM signals and Single Carrier signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.