Enhancement of PAPR reduction using dynamic PTS algorithm in multiple antennas system

Partial transmit sequences (PTS) seems to be attractive for peak to average power ratio (PAPR) reduction in OFDM system, since it obtains better PAPR property by modifying OFDM signals without distortion. Meanwhile it also shows the potential to be utilized in MIMO-OFDM system. In this paper, a dynamic PTS algorithm with a simplified minimum maximum (minimax) criterion is proposed to optimize the phase factor in MIMO-OFDM system. By dynamic adjusting neighborhood of radius the complexity for deciding phase factor can be reduced on demand. Additionally, with the aid of guided scrambling (GS) the phase factor can be obtained directly by descrambling implementation and the PAPR can also be further reduced. Since the side information is not required to transmit to the receiver side, the overhead of the data transmission can be reduced. Simulation results show that the proposed scheme can achieve more gain in terms of PAPR reduction without any transmission of side information in the multiple antennas system.