COMMUNICATION DEVICE AND CFR PROCESSING METHOD FOR MULTISTAGE CREST FACTOR REDUCTION WITH SAMPLE SHIFTING BETWEEN STAGES

The present disclosure relates to a method of reducing a Peak to Average Power Ratio (PAPR) in a communication device, and more particularly, to a method of Crest Factor Reduction (CFR) processing of a signal in order to reduce a PAPR in a communication device such as a repeater. The communication device includes: a first CFR module configured generate a first processed signal by CFR processing an original signal; and a second CFR module configured generate a second processed signal by CFR processing the first processed signal, wherein the first processed signal is generated using a first sampling rate, and the second processed signal is generated using a second sampling rate. A sample shift of half a sampling period is provided between two stages of CFR. According to the disclosure, even a communication device with a low sampling rate may effectively remove a peak component of an input signal.