PAPR Reduction in SC-IFDMA Using a Piece-Wise Linear Nyquist Filter

A novel Nyquist filter was proposed to reduce the peak-to-average power ratio (PAPR) in the interleaved single carrier orthogonal frequency division multiple access (SC-IFDMA) system based on pulse shaping. The proposed filter has a piece-wise rectangular frequency characteristic composed of six nonzero linear segments with variable-length projections onto the frequency axis, which are used as a set of independent design parameters from roll-off factor α. Simulation results show that the novel filter has a better PAPR reduction performance and lower symbol error rate compared to some recently proposed filters, and it has lower computational complexity.