Adaptive clipping level control for OFDM peak power reduction using clipping and filtering

摘要

In this paper, we propose an adaptive clipping level control method to minimize the performance degradation and to suppress the out-band emission for OFDM peak power reduction technique using clipping and filtering. In this method, the clipping level is iteratively optimized by checking the peak power regrowth caused by inserting a filter. By doing so the peak power is adjusted to constant value and the efficiency of amplifier is improved without the bit error rate degradation. We derive the level of out-band emission and the bit error rate performance of the proposed system using computer simulation and confirm the effectiveness of the proposed system.