Analysis of the performance of iterative estimation and cancellation of clipping non-linear distortion in OFDM

Clipping is usually applied to decrease the high peak-to-average power ratio (PAPR) caused by orthogonal-frequency-division-multiplex (OFDM) with interference. To resolve this problem, an iterative estimation and cancellation of clipping non-linear distortion scheme is proposed. This paper presents that the performance of iterative estimation and cancellation of clipping non-linear distortion is better than that of clipping noise. The method of iterative estimation and cancellation of clipping non-linear distortion can recover the signal before clipping perfectly with the ideal feedback data. However, if receiver only estimate and cancel the clipping noise the signal will still be influenced by the attenuation caused by clipping. Analysis and simulation results prove the conclusion. And it is shown by numerical simulation results that system performance can be improved evidently. When the clipping threshold is 1.2, the performance is improved about 2 dB with only one iterative estimation and cancellation.