A novel two-layered suboptimal approach to partial transmit sequences

A high peak-to-average power ratio (PAPR) is a major shortcoming in multicarrier systems, as it causes non-linearity in the transmitter, degrading the performance of the system significantly. Partial transmit sequences (PTS) is one of the best methods in reducing PAPR, in which the information-bearing subcarriers are divided into M disjoint subblocks, each controlled by a phase rotation factor which brings PAPR down. Though PAPR reduction by PTS is more effective with more subblocks, there is a corresponding exponential increase in complexity. In this paper, a novel implementation of PTS is presented which a dual-layered approached is employed to reduce complexity.