A system (200) for crest factor reduction (CFR) includes a peak detector (205) configured to receive an input signal (xk); a running maximum filter (210) configured to generate a scaling factor based on a window gain (Gk) and a filter length, wherein the window gain (Gk) is based on the input signal (Xk) and a threshold value (T); a window CFR gain filter (215) configured to generate a gain correction (Fk) based on the scaling factor and the filter length; a delay (225) configured to delay the input signal (Xk) to generate a delayed input signal; a multiplier (230) configured to multiply the gain correction (Fk) by the delayed input signal to obtain a peak correction value; and an adder (235) configured to determine an output signal (yk) based on the peak correction value and the delayed input signal.
