Constructing Phase Generation Mechanism based on Recursive Structure for PAPR Reduction in SLM-OFDM Systems

Selective Mapping (SLM) is a popular technique used to reduce the Peak-to-Average Power Ratio (PAPR) in Orthogonal Frequency Division Multiplexing (OFDM) systems. Recently, Ali et al. proposed a systematically structured phase generation mechanism and applied it to the SLM scheme to generate scrambling phase sequences, known as PRS-SLM. PRS-SLM primarily utilizes a seed matrix for recursive construction to generate the scrambling phase sequences required for the SLM scheme. Although PRS-SLM can improve the circuit complexity of the phase generation mechanism in SLM, the optimal design of the seed matrix and its recursive construction to achieve better PAPR reduction performance in SLM remains an unresolved issue. Therefore, this paper proposes four recursive construction methods for generating scrambling phase sequences, and simulation results show that the proposed methods not only retain a systematic structure design but also achieve similar PAPR reduction performance as traditional SLM.