Selected-Mapping Peak-to-Average Power Reduction Method with Orthogonal Pilot Sequences in Underwate

• 作 者: QIAO Gang XING Siyu ZHOU Feng
• 机 构: Acoustic Science and Technology Laboratory, Harbin Engineering University, Harbin 150001, China;Key
• 出 处: 电子学报（英文）
• 发表日期: 2021年1期
• 关键词: Underwater acoustic communication OFDM PAPR reduction Selected mapping

A novel Selected-mapping (SLM) Peak-to-average power ratio (PAPR) reduction scheme requires no Side information (SI) in Underwater acoustic (UWA) OFDM system is proposed. In the proposed scheme, every distinct phase sequence is represented by a unique Orthogonal comb pilot sequence (OPS), and the orthogonal properties of the OPSs are used to distinguish the index of phase sequences at the receiver. Therefore, the proposed scheme does not need to reserve bits for transmitting SI, so that the data rate can be raised. Simulation results show that the PAPR reduction performance has almost 0.5dB gains comparing to the Conventional SLM (C-SLM) scheme and the Bit error ratio (BER) performance is approximately the same as the SLM scheme with perfect SI. Field experimental results also demonstrate that the proposed scheme can differentiate phase sequences, therefore significantly enhance the quality of the UWA OFDM communication system.