Selected mapping applied scheme for PAPR reduction in OFDM communication systems

OFDM applied systems are the candidates for the future wireless communications. However, high peak-to-average ratio (PAPR) degrades the system performance. Applying the signal space expansion into the signal selection scheme, PAPR reduction could be implemented in OFDM systems. In this paper, a selected mapping (SLM) applied scheme using signal space expansion is proposed. In the scheme, a specific rule is designed to scramble the data sequence for PAPR reduction. The data sequence can be completely extracted at the receiver without any side information. Hence, the scheme can be implemented to reduce PAPR and to avoid bit error rate (BER) degradation in the OFDM system. Then, the numerical results are given to evaluate the performance on PAPR reduction and BER in the OFDM system. The result shows BER performance with the proposed SLM applied scheme is better than that with the ordinary SLM scheme.