An improved DFT spread with genetic algorithm in layered PTS for reduced PAPR in FBMC OQAM systems

Abstract

The Partial Transmit Sequence (PTS) is the innovative method for low Peak to Average Power Ratio (PAPR) in multicarrier modulations (MCM). The Filter Bank Multi-carrier (FBMC) method proves a promising technique in advanced wireless communication. The addition of the cyclic prefix reduces the interferences that cause spectral efficiency degradation. Also, computational complexity is the major problem in MCM. It is anticipated to use a Genetic Algorithm (GA) and improve DFT spread in a layered partial transmit sequence (GA-LPTS). The projected system endures splitting each subblock, renovating the conventional PTS's one-layer structure into a dual-layer phase rotation factors search arrangement, and introducing a consequence-related threshold point. The GA then obtains the suboptimal phase factor vectors before PAPR reduction processing. The DFT spread IGA-LPTS scheme successfully condenses the FBMC/OQAM signal's PAPR. The anticipated results are compared to those obtained using the penalty concave-convex procedure (penalty-CCCP) and the carrier frequency offset (CFO) algorithm.