A Comparison between SLM, PTS, and CF Schemes for the Reduction of PAPR of OFDM System with CPM Mappers

In this paper, three existing reduction techniques are applied to different Orthogonal Freqency Division Multiplexing (OFDM) in Continuous Phase Modulation (CPM) mappers. particularly, selecteive mapping (SLM), partial transmit sequence (PTS), and clippling and filtering (CF) techniques are investigated. The analysis was performed for an OFDM system with CPM mappers with 128 and subcarriers. it is shown that PTS method performs very well in comparison to the SLM and CF schemes in terms of PAPR reduction for the same number of subcarriers . Various subclasses of CPM mappers such as single-h CPFSK, multi-h CPFSK, and asymmetric multi-h CPFSK are considered to reduce PAPR. Next, these mappers in conjunction with SLM, PTS, and CF techniques are considered. A comparison of the PAPR reduction capability of CPM mappers relative to memoryless BPSK mappers in an OFDM system is presented. It is noted that, in general, CPM mappers offer superior PAPR performance compared to memoryless mappers in an OFDM system. A detailed analysis of schemes has also been furnished in our paper.