TITLE:
Reduction PAPR of OFDM Signals by Combining Grouped DCT Precoding with PTS
AUTHORS:
Zhongpeng Wang, Shoufa Chen
KEYWORDS:
Orthogonal Frquency-Division Multiplexing (OFDM), Peak-to-Average Power Ratio (PAPR), Partial Transmit Sequence (PTS), Discrete Cosine Transform (DCT)
JOURNAL NAME:
Journal of Signal and Information Processing,
Vol.5 No.4,
October
15,
2014
ABSTRACT: 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.