Patent ID: 7995975

Claim:
A method of reducing a peak-to-average ratio in a complex-valued signal comprising: detecting peaks in the signal that are above a peak threshold; characterizing a peak shape for each Cartesian component of the detected peaks; generating cancellation pulses corresponding to each of the Cartesian components of the detected peaks based on the characterized peak shapes; and canceling the detected peaks by combining the cancellation pulses with a correspondingly delayed version of the signal; wherein detecting peaks in the signal that are above a peak threshold comprises evaluating the signal at a first peak detection precision and, for peaks detected at the first peak detection precision, evaluating the signal at a greater second peak detection precision to confirm the presence of peaks detected at the first peak detection precision; and wherein the peak threshold is in polar form, and wherein evaluating the signal at the first peak detection precision comprises comparing a sum of unsigned Cartesian components of the signal to the peak threshold, and wherein evaluating the signal at the second peak detection precision comprises comparing a sum of squared Cartesian components of the signal to the squared peak threshold.