On Application of Hard-Clipping and Soft-Clipping for SEFDM Signal with Optimal Envelope.

Simulation modeling of information transmission using spectrally efficient multi-frequency signals with using peak-to-average power ratio (PAPR) reduction methods (hard-clipping and soft-clipping) on transmission was held. Simulation results show that for SEFDM with optimal envelope, using soft-clipping method for PAPR reduction will reduce out-of-band emission (OOBE) of the signal at 50 dB of energy spectrum compared to hard-clipping method, thereby increasing the spectral efficiency. Besides that, for SEFDM with optimal envelope, soft-clipping method also slightly reduces the probability of bit errors when the PAPR reduction value is between 2–6 dB. However, for SEFDM with rectangular envelope, soft-clipping method increases the probability of bit errors.