A Reduced-Complexity PTS-Based PAPR Reduction Scheme for OFDM Systems

Author

Ku, Sheng-Ju ; Wang, Chin-Liang ; Chen, Chiuan-Hsu

Author_Institution

Inst. of Commun. Eng., Nat. Tsing Hua Univ., Hsinchu, Taiwan

Volume

9

Issue

8

fYear

2010

fDate

8/1/2010 12:00:00 AM

Firstpage

2455

Lastpage

2460

Abstract

In this paper, a reduced-complexity partial transmit sequences (PTS) scheme is proposed to resolve the intrinsic high peak-to-average power ratio (PAPR) problem of orthogonal frequency division multiplexing (OFDM) systems. In the proposed PTS scheme, a cost function Q_n is generated by summing the power of the time-domain samples at time n in each subblock. Only those samples with Q_n greater than or equal to a preset threshold are used for peak power calculation during the process of selecting a candidate signal with the lowest PAPR for transmission. As compared to the conventional PTS scheme, the proposed one achieves almost the same PAPR reduction performance with much lower computational complexity.

Keywords

OFDM modulation; data communication; interference suppression; sequences; time-domain analysis; OFDM systems; PAPR reduction scheme; PTS scheme; orthogonal frequency division multiplexing; partial transmit sequences; peak-to-average power ratio; time-domain; Computational complexity; Cost function; Fast Fourier transforms; Frequency division multiplexing; OFDM; Partial transmit sequences; Peak to average power ratio; Power generation; Signal processing; Time domain analysis; Inverse fast Fourier transform (IFFT); orthogonal frequency division multiplexing (OFDM); partial transmit sequences (PTS); peak-to-average power ratio (PAPR) reduction;

fLanguage

English

Journal_Title

Wireless Communications, IEEE Transactions on

Publisher

ieee

ISSN

1536-1276

Type

jour

DOI

10.1109/TWC.2010.062310.100191

Filename

5497971