Method and apparatus for signal peak-to-average ratio reduction

A signal processing circuit for reducing a peak-to-average ratio in a complex-valued signal comprising one or more processing circuits configured to:

• detect peaks in the signal that are above a peak threshold by evaluating the signal using a first peak detection function that indicates possible peaks in the signal and, for possible peaks detected using the first peak detection function, evaluating the signal using a second peak detection function that confirms or refutes each possible peak as a detected peak in the signal that meets or exceeds the peak threshold;
• characterize a peak shape for each Cartesian component of the detected peaks;
• generate cancellation pulses corresponding to each of the Cartesian components of the detected peaks based on the characterized peak shapes;
• and
• cancel the detected peaks by combining the cancellation pulses with a correspondingly delayed version of the signal.

A wireless communication device configured to reduce a peak-to-average ratio in a complex-valued signal, said wireless communication device comprising:

• a signal generator configured to generate said signal;
• and
• a transmitter configured to reduce the peak-to-average ratio of said signal for transmission from an associated antenna based on said transmitter including a signal processing circuit that is configured to:
• detect peaks in the signal that are above a peak threshold by evaluating the signal using a first peak detection function that indicates possible peaks in the signal and, for possible peaks detected using the first peak detection function, evaluating the signal using a second peak detection function that confirms or refutes each possible peak as a detected peak in the signal that meets or exceeds the peak threshold;
• characterize a peak shape for each Cartesian component of the detected peaks;
• generate cancellation pulses corresponding to each of the Cartesian components of the detected peaks based on the characterized peak shapes;
• and
• cancel the detected peaks by combining the cancellation pulses with a correspondingly delayed version of the signal.