Orthogonal frequency division multiplexing (OFDM) method and apparatus for protecting and authenticating wirelessly transmitted digital information
US7929409B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 13, 2005 |
| Grant date | Apr 19, 2011 |
| Priority date | — |
| Expiry date | Oct 25, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/1812
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for protecting and authenticating wirelessly transmitted digital information using numerous techniques. The apparatus may be a wireless orthogonal frequency division multiplexing (OFDM) communication system, a base station, a wireless transmit/receive unit (WTRU), a transmitter, a receiver and/or an integrated circuit (IC). The wireless OFDM communication system includes a transmitter which steganographically embeds digital information in an OFDM communication signal and wirelessly transmits the OFDM communication signal. The system further includes a receiver which receives the OFDM communication signal and extracts the steganographically embedded digital information from the received OFDM communication signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.