PEAK POWER SUPPRESSION CIRCUIT, AND COMMUNICATION DEVICE PROVIDED WITH SAID CIRCUIT

摘要

Provided is a peak power suppression circuit (9) wherein it is possible to more reliably suppress the peak power of IQ-baseband signals. The peak power suppression circuit (9) performs clipping processing on IQ-baseband signals. The suppression circuit (9) is provided with a power calculating unit (13) which calculates the instantaneous power (P) of an IQ-baseband signal, a pulse retention unit (22) which retains an offset pulse (S) that contains the frequency components within the frequency band (B) of the IQ-baseband signal and outside said frequency band (B), and a clipping processing unit (17) which, in relation to the IQ-baseband signal in which the calculated instantaneous power (P) is larger than a predetermined threshold value (Pth), subtracts the offset signals (Ic, Qc) obtained by multiplying the increment (?I, ?Q) of the aforementioned IQ-baseband signal from the threshold value (Pth) with the offset pulse (S).