Reduction of OFDM PAPR Using a Combined Hadamard Transformation and Selective Mapping for Terrestrial DAB+ System under Rayleigh and AWGN Channel

—This paper discusses a method for Peak to Average Power Ratio (PAPR) reduction in Orthogonal Frequency Division Multiplexing (OFDM). A Combination of Selective Mapping (SLM) and Hadamard Transformation (HT) as a simple and computational efficient technique for PAPR reduction in Orthogonal Frequency Division Multiplexing (OFDM) system is presented. In the proposed approach, Hadamard transformation was used in order to reduce the autocorrelation of data symbols which in turn reduces the resulting PAPR. Selective Mapping (SLM) was used to select an OFDM symbol with minimum Peak to Average Power Ratio (PAPR). The simulation results show that at the Complementary Cumulative Distribution Function (CCDF) of 𝟒 × 𝟏𝟎 −𝟑 , the PAPRof the proposed scheme is 5.84 dB. This marks an improvement of 4.26 dB when compared with PAPR of the original OFDM which is 10.10dB. On the other hand, the performance of our proposed scheme shows no significant Bit Error Rate (BER) deviation from that of the original data.