A PRSC selection scheme based on PN code for OFDM PAPR reduction

Abstract

For PAPR (Peak-to-Average Power Ratio) reduction in OFDM (Orthogonal Frequency Division Multiplexing) systems, we propose an effective PRSC (PAPR Reduction Sub-Carrier) selection scheme using PN (Pseudo Noise) code. The conventional PRSC selection scheme using ideal random sequence may achieve the optimal performance with the lowest PAPR, however, excessive overhead from the transmitter to the receiver is inevitable. The proposed scheme exploits PN code based PRSC selection sequence which is generated by applying starting points determined by bit reversing and gradually-increasing offsets. Simulation results show that the proposed PRSC selection scheme achieves quite good performance which is closely comparable to the case of the ideal random sequence, while requiring virtually no overhead. © 2004 IEEE.