Time-domian amplitude manipulative PAPR reduction techniques on PRS-OFDM system

As a promising technique for high data-rate transmission, OFDM has been successfully used in many environments, such as DAB, DVB, and HiperLAN-II. In a classical OFDM system, the entire channel is divided into many orthogonal subchannels. Information symbols are transmitted in parallel over these subchannels with a long symbol duration in order to deal with frequency-selective fading of wireless environments. However, it has been shown that ICI destroys orthogonality among subchannels and causes ICI to occur. If not compensated for, the ICI will result in an error floor in the OFDM performance. Several methods have been proposed to reduce the effect of the ICI. One of the methods is frequencydomain PRS. Performing PRS in the time domain has been studied for single-carrier systems to reduce the sensitivity to time offset without sacrificing the bandwidth. In the frequency domain, the PRS with correlation polynomial F(D) = 1–D was used to mitigate the ICI caused by carrier frequency offset