System and method for communicating data using symbol-based...

H - Electricity – 04 – L

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H04L 27/26 (2006.01)

Patent

CA 2660786

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.

La présente invention concerne un système et un dispositif qui communiquent des données. Un circuit de modulation et de mappage module et mappe des symboles de données en une pluralité de fréquences sous-porteuses multiples qui sont orthogonales les unes par rapport aux autres de manière à former un signal de communication multiplexé par répartition orthogonale de la fréquence (OFDM) sur la base d'un débit de symboles OFDM fixe ou variable. Un générateur de signaux pseudo-aléatoires fonctionne avec le circuit de modulation et de mappage sur la base d'un algorithme de cryptage pour réaliser un saut de fréquence pour chaque sous-porteuse à un débit de symboles OFDM afin de réduire toute probabilité d'interception et de détection, réduire la puissance par fréquence (dB/Hz/sec), et réduire toute puissance de transmission nécessaire tout en conservant un rapport signal à bruit instantané.

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