Extended iterative flipping algorithm for PAPR reduction in OFDM systems

A novel suboptimal technique called extended iterative flipping (E-Flipping) algorithm has been proposed to reduce the peak-to-average power ratio (PAPR) in orthogonal frequency division multiplexing (OFDM) systems. The key idea of the proposed technique is to partition the partial transmit sequences (PTSs) into several groups and then to perform the "flipping" operation on each group. It has also been shown that the well-known PTS scheme and iterative flipping scheme can be regarded as special cases of the proposed technique. The simulation results show that the proposed technique can achieve remarkable PAPR reduction with a slight complexity increase compared with the original iterative flipping (O-Flipping) algorithm. Moreover, the complexity of the proposed algorithm can be further reduced if the preset threshold is used.