Peak Reduction of Multi-Carrier Systems by Controlled Spectral Outgrowth

Author

Deumal, Marc ; Pijoan, Joan L. ; Gutierrez, Ismael ; Behravan, Ali

Author_Institution

Dept. of Commun. & Signal Theory, Ramon Llull Univ., Barcelona

Volume

4

fYear

2006

fDate

14-19 May 2006

Abstract

One of the major drawbacks with multi-carrier (MC) modulations is the large peak-to-average power ratio (PAPR) of the transmitted signal which significantly reduces the power amplifier efficiency and the system performance. Several PAPR reducing methods which do not decrease the system performance have been proposed. In this paper, we present a new low complexity PAPR reduction technique based on the controlled spectral outgrowth (CSO) of the nearby subcarriers which neither requires the transmission of additional information nor reduces the system performance and is independent of the mapping scheme. The proposed method can be easily combined with most of the methods in the literature to provide a further peak reduction in any MC or MC spread spectrum (MC-SS) system. An analog PAPR reduction about 2.5 dB at 10^-4 symbol clip probability and a power increase about 0.12 dB are obtained for a 256-subcarrier of OFDM transmission

Keywords

OFDM modulation; signal processing; spread spectrum communication; MC spread spectrum system; OFDM transmission; controlled spectral outgrowth; mapping scheme; multicarrier modulations; peak reduction; peak-to-average power ratio; symbol clip probability; transmitted signal; Communication system control; Control systems; Degradation; High power amplifiers; OFDM modulation; Peak to average power ratio; Power amplifiers; Spread spectrum communication; System performance; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech and Signal Processing, 2006. ICASSP 2006 Proceedings. 2006 IEEE International Conference on

Conference_Location

Toulouse

ISSN

1520-6149

Print_ISBN

1-4244-0469-X

Type

conf

DOI

10.1109/ICASSP.2006.1660969

Filename

1660969