Abstract: “Orthogonal frequency division multiplexing (OFDM) technique is a promising technique to offer high data rate and reliable communications over fading channels. The main implementation disadvantage of OFDM is the possibility of high peak to average power ratio (PAPR). This paper presents a novel technique to reduce the PAPR using turbo coding and selective mapping (SLM). We show that the prob-ability of the PAPR of OFDM signal with 128 subcarriers exceeding 7 dB can be reduced from 70% to 0.25% with bit error rate (BER) of 6 × 10−5 at signal to noise ratio (SNR) 4 dB”

Keywords: SIGNAL, TURBO, CODING, MAPPING