Patent ID: 7751488

Claim:
A device for communicating data, comprising: a modulation and mapping circuit that 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 and comprising a modulator and a subcarrier mapper circuit for mapping carriers to an Inverse Fast Fourier Transform (IFFT) in a matrix operation; and a pseudo-random signal generator comprising a pseudorandom amplitude and phase signal generator operative with the modulator for generating pseudo-random signals to the modulator using an encryption algorithm for changing subcarrier constellation amplitude and phase values, and a pseudo-random subcarrier location circuit operative with the subcarrier mapper circuit and generating pseudo-random signals to the subcarrier mapper circuit using the same encryption algorithm used to change subcarrier constellation amplitude and phase values such that each subcarrier is frequency hopped at an OFDM symbol rate and subcarrier center frequencies are changed at OFDM symbol times according to the encryption algorithm.