Performance analysis of SLM for PAPR reduction of OFDM signal in Marine Channel

Orthogonal frequency division multiplexing (OFDM) modulation using orthogonal subcarriers reduces the delay spread by increasing robustness to multipath fading and can use overlapped bandwidth due to orthogonality on frequency domain. The main drawback of Orthogonal Frequency Division Multiplexing (OFDM) systems is the high peak-to average power ratio (PAPR), which significantly reduces the efficiency of the transmit high power amplifier (HPA). Several methods have been proposed in the literature to reduce the peak power of OFDM signals and substantial gains were reported. In SLM technique of PAPR reduction, side information needs to be transmitted for demodulation while degrading transmission efficiency. Though many studies have been carried out to analyze the performance of various PAPR reduction methods for land, the studies for sea environment is hardly addressed in literature. In this paper, we have analyzed the effectiveness of SLM technique utilizing cyclic shifting of pilots for Marine Channel.