Enhancing Energy Efficiency DFT-S-OFDM systems with Low Complexity applying SDD Preselection Schemes

DFT-S-OFDM pre-transforms signals at the transmitter, resulting in a single-carrier form and lower PAPR than traditional multi-carrier systems. However, as modulation order increases, its advantage over OFDM diminishes and power amplifier inefficiency persists. This study optimizes DFT-S-OFDM signal power amplifier efficiency using an intelligent continuous unconstrained PTS algorithm. Standard distance deviation analysis is used to analyze signal distribution characteristics and select the signal with the highest dispersion for PAPR suppression with low complexity. A DE-CUPTS-DFT-S-OFDM multi-carrier system is proposed, with SDD analysis expanding the phase selection area and intelligent multi-objective optimization significantly improving the PAPR suppression effect and transmitter efficiency.