Optimized iterative clipping filtering (OICF) is an optimal algorithm for peak to average power ratio (PAPR) reduction

since it can achieve the required PAPR reduction with minimum in-band distortion.However

OICF needs to solve a convex optimization problem with

O

(

N

3

) complexity

where N is the number of subcarriers.To reduce the complexity

a method based on the peak cancellation (PC-PAPR) is proposed.This method uses a zero-phase filter

which length is

Q

to modify the spectrum of the peak pulse.After the filter

the phase of the peak pulse is not changed

and the out-of-band spectrum of the pulse is zero.Results of analysis show that the computational comp

lexity of the PC-PAPR is

O

(

QN

)

and simulation results show that the difference of PAPR-reduction performance between PC-PAPR and OICF is less than 0.06dB.