Patent ID: 7627046

Claim:
A method for side lobe amplitude reduction, comprising: obtaining a data carrying signal waveform, the data carrying signal waveform having sub-carrier signals; obtaining an initial peak reduction waveform, the initial peak reduction waveform obtained by selection of a portion of the sub-carrier signals for non-data carrying; wherein the initial peak reduction waveform is obtained from reserved frequency bins with respect to an Inverse Fast Fourier Transform; wherein the initial peak reduction waveform is orthogonal to the data carrying signal waveform; and refining the initial peak reduction waveform by at least one recursive iteration, the recursive iteration including, combining the initial peak reduction waveform with a circularly time-shifted version thereof to obtain a resultant peak reduction waveform having a peak side lobe amplitude less than that of the initial peak reduction waveform; wherein the side lobe amplitude is reduced to enhance a peak-to-side lobe amplitude ratio such that the resultant peak reduction waveform has a more impulse or impulse-like profile than the initial peak reduction waveform.