PAPR reduction with Adjustable Circle Constrain for OFDM systems

Active constellation extension (ACE) is an effective and credibly method to reduce the ratio of the instantaneous power to the average power (PAPR) of the OFDM signals. But the reduction is improved at the expense of increasing the number of iterations. In this paper, we propose the adjustable circle constrain (ACC) method. By setting the circle constrain with various circle centers, radius and compression ratio of the signal peak value on the constellation, excellent PAPR reduction and acceptable BER can be attained without proceeding iterative computations. Like ACE, ACC does not require additional devices in the receiver, but consumes much less computation time in comparison with ACE in PAPR reduction.