Author(s)

Zhongpeng Wang^1,2, Shoufa Chen¹

¹School of Information and Electronic Engineering, Zhejiang University of Science and Technology, Hangzhou, China.
²State Key Laboratory of Millimeter Waves, Southeast University, Nanjing, China.

The high peak-to-average power ratio (PAPR) is one of the serious problems in the application of OFDM technology. In this paper, an improved partial transmit sequence (PTS) scheme based on combining the grouped discrete cosine transform (DCT) with PTS technique is proposed. In the proposed scheme, the adjacent partitioned data are firstly transformed by a DCT into new modified data. After that the proposed scheme utilizes the conventional PTS technique to further reduce the PAPR of the OFDM signal. The performance of the PAPR is evaluated using a computer simulation. The simulation results indicate that the proposed scheme may improve the PAPR performance compared with the conventional PTS scheme, the grouped DCT scheme, and original OFDM respectively.

Orthogonal Frquency-Division Multiplexing (OFDM), Peak-to-Average Power Ratio (PAPR), Partial Transmit Sequence (PTS), Discrete Cosine Transform (DCT)

Wang, Z. and Chen, S. (2014) Reduction PAPR of OFDM Signals by Combining Grouped DCT Precoding with PTS. Journal of Signal and Information Processing, 5, 135-142. doi: 10.4236/jsip.2014.54016.