High PAPR Sequence Scrambling for Reducing OFDM Peak-to-Average Power Ratio

摘要

A major drawback of orthogonal frequency division multiplexing (OFDM) systems is their large peak to average power ratio (PAPR). In this paper, we propose a simple selective-mapping (SLM) technique using scrambling to reduce the PAPR of OFDM signals. This technique selects symbol sequences with high PAPR and scrambles them until a low PAPR sequence below a specific threshold is generated. The computational complexity of the proposed scheme is considerably lower than the traditional SLM. Also we investigate the performance of the system through simulations.