Linear Companding Transform for the Reduction of Peak-to-Average Power Ratio of OFDM Signals

被引：77

作者：

Aburakhia, Sulaiman A. ^{[1
]}

Badran, Ehab F. ^{[2
]}

Mohamed, Darwish A. E. ^{[2
]}

机构：

[1] MSI Consultancy, KSA Off, Riyadh, Saudi Arabia

[2] Arab Acad Sci & Technol & Maritime Transport, Coll Engn Technol, Dept Elect & Commun Engn, Alexandria 21937, Egypt

来源：

IEEE TRANSACTIONS ON BROADCASTING | 2009年 / 55卷 / 01期

关键词：

Companding transform (CT); linear companding transform (LCT); nonlinear power amplifier (PA); orthogonal frequency-division multiplexing (OFDM); peak-to-average power ratio (PAPR); PAPR REDUCTION; VOL; 45; NO; PERFORMANCE;

D O I：

10.1109/TBC.2009.2013987

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A major drawback of orthogonal frequency-division multiplexing (OFDM) signals is their high peak-to-average power ratio (PAPR), which causes serious degradation in performance when a nonlinear power amplifier (PA) is used. Companding transform (CT) is a well-known method to reduce PAPR without restrictions on system parameters such as number of subcarriers, frame format and constellation type. Recently, a linear nonsymmetrical companding transform (LNST) that has better performance than logarithmic-based transforms such as mu-law companding was proposed. In this paper, a new linear companding transform (LCT) with more design flexibility than LNST is proposed. Computer simulations show that the proposed transform has a better PAPR reduction and bit error rate (BER) performance than LNST with better power spectral density (PSD).

引用

页码：155 / 160

页数：6

共 22 条

[1]

Aburakhia S. A., 2007, P 1 INT C DIG COMM C, P423

[2] Peak-to-average power reduction for OFDM by repeated clipping and frequency domain filtering [J].