PAPR reduction of an OFDM signal using sub-optimal PTS combined with guided scrambling

A high peak-to-average power ratio (PAPR) is one of the major shortcomings in multicarrier systems, as it causes nonlinearity distortion in the transmitter, degrading the performance of the system significantly. Partial transmit sequence (PTS) is an approach that can significantly improve the statistics of the PAPR of an orthogonal frequency division multiplexing (OFDM) signal. Guided scrambling is an extension of self-synchronizing scrambling. It is also capable of guiding the scrambling process to produce a balanced encoded bit stream. In this paper, we want to propose a sub-optimal algorithm to optimize the phase factor in PTS. In addition, we integrate guided scrambling coding with this method. The proposed GS-Sub-PTS method can get much more PAPR reduction at expense of incur little error extension and do not require transmission of side information.