Low Complexity SLM-PTS Method for Reduction of PAPR in OFDM Systems

Orthogonal frequency division multiplexing (OFDM) is an attractive current technology for wireless communication systems due to its high spectral efficiency. One major disadvantage associated with OFDM is high peak to average power ratio (PAPR). It needs a large back-off high power amplifier (HPA) else degradation of bit error rate (BER) occurred. Selective mapping (SLM) is an effective technique used to reduce PAPR. It has a large computational complexity caused by bank of inverse fast Fourier transforms (IFFTs). This paper, have been proposed low complexity SLM-PTS method uses a conversion sequence and the concept of partial transmit sequence (PTS) to replaces the bank of IFFTs in the conventional SLM. The simulation results show that the proposed method PAPR performance is same as the conventional SLM method.