Low complexity PTS algorithms with error correction capability in OFDM systems

One of the challenging issues for orthogonal frequency division multiplexing (OFDM) system is high peak-to-average power ratio (PAPR) of the transmitted OFDM signals. Partial transmit sequence (PTS) technique can improve the PAPR statistics of an OFDM signal. However, the major drawback of the conventional PTS (C-PTS) is the high computational complexity. In this paper, we propose the parallel PTS (P-PTS)and serial PTS (S-PTS) methods to reduce the C-PTS complexity, based on the fact that the weighting factors are chosen as codewords of a linear block code. Compared to the C-PTS, the P-PTS and S-PTS methods not only reduce the computational complexity but also provide error correction capability for the weighting factors.