Peak-to-average power ratio reduction scheme in impulse postfix OFDM system

A recently introduced impulse postfix OFDM (IPOFDM) system achieves the enhanced bit error rate (BER) performance compared to that of conventional OFDM systems, but there is an important peak-to-average power ratio (PAPR) issue of using impulse postfix (IP) that needs to be resolved. This paper proposes a combined IP-OFDM scheme with the selected mapping technique and the optimum power boosting factor (PBF) determination method to resolve the PAPR issue while achieving the enhanced BER performance. In this paper, the effectiveness of proposed scheme is analyzed in terms of the BER performance as well as the input back-off (IBO) to high power amplifier. The analytic results show that the proposed scheme provides the remarkable BER performance enhancement with relatively low IBO (or PBF) rather than with high IBO (or PBF).