Orthogonal frequency division multiple access peak-to-average power ratio reduction using optimized pilot symbols

In this paper, optimized pilot symbol (OPS) technique is proposed to reduce the peak-to-average power ratio (PAPR) of orthogonal frequency division multiple access (OFDMA) systems. The proposed PAPR reduction scheme is designed for OFDMA systems where the subcarriers assigned to each user are selected in clusters of consecutive subcarriers. Using the proposed scheme, the PAPR can be significantly reduced while maintaining low complexity and high flexibility on the channel assignment