Patent ID: 8275020

Claim:
A transmitter system for generating a non-differentiable transmit signal, comprising: a processor configured to: receive an input data stream represented by a signal waveform, the signal waveform comprising a plurality of waveform elements, wherein one of the waveform elements is a carrier frequency of the signal waveform; compute, for each waveform element, a sequence of frequency values, wherein each frequency value is computed based on a randomly selected prime number and the frequency values for each waveform element are independent of the frequency values for every other waveform element; compute, for each waveform element, a sequence of timing windows whose durations are randomly selected and respectively specify periods over which the frequency values are applied to the waveform element, wherein the timing windows for each waveform element are independent of the timing windows for every other waveform element; and modify the signal waveform in accordance with the sequence of frequency values and timing windows for each waveform element to produce the non-differentiable transmit signal so that no continuous or relative timing of the waveform elements is present in the resulting waveform; and a transmitter configured to transmit the non-differentiable transmit signal.