PAPR reduction of OFDM signals using pseudo random PTS without side information

PAPR reduction of OFDM signal has been a subject of intense research in the past decade. Many methods have been proposed to reduce the high PAPR problem. Partial transmit sequence (PTS) is one of the most popular peak-to-average power ratio (PAPR) reduction technique proposed for orthogonal frequency-division multiplexing (OFDM) systems. The Conventional PTS (C-PTS) is suffers from higher computational complexity and it requires several extra subcarriers for the transmission ofside information. These extra subcarriers will degrade the OFDM system´s spectrum efficiency and increase the bit error rate. Several proposals had taken for eliminating the need of side information in the literature, but these existing techniques rely on some reference symbols which increases the transmission power or higher the complexity of the detector. In this paper, Pseudo-random PTS which uses cyclic shifting of subblock sequences is proposed to eliminate the need of side information. Simulation shows that the proposed scheme performs very well in terms of PAPR. The proposed scheme achieves almost the same bit error rate (BER) performance as the C-PTS with perfect side information, under frequency selective fading condition.