System and method for communicating data using symbol-based randomized orthogonal frequency division multiplexing (OFDM)
US7751488B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 16, 2006 |
| Grant date | Jul 6, 2010 |
| Priority date | — |
| Expiry date | Jan 31, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2618
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A system and device communicates data. A modulation and mapping circuit modulates and maps data symbols into a plurality of multiple subcarrier frequencies that are orthogonal to each other to form an Orthogonal Frequency Division Multiplexed (OFDM) communications signal based on a fixed or variable OFDM symbol rate. A pseudo-random signal generator is operative with the modulation and mapping circuit for generating pseudo-random signals to the modulation and mapping circuit based on an encryption algorithm for frequency hopping each subcarrier at an OFDM symbol rate to lower any probability of interception and detection, reduced power per frequency (dB/Hz/sec), and lower any required transmission power while maintaining an instantaneous signal-to-noise ratio.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.