Power-efficient M-QAM signal constellations to reduce the PMEPR in OFDM systems

Author

Vaezi, Mojtaba ; Mirzaee, Alireza ; Safavi, Seyed Mostafa

Author_Institution

Iran Telecommun. Res. Center, Amirkabir Univ. of Technol., Tehran

Volume

2

fYear

2005

fDate

11-14 Sept. 2005

Firstpage

1135

Abstract

In this paper, we consider the problem of peak to mean envelope power ratio (PMEPR) in orthogonal frequency division multiplexing (OFDM) systems. First, we propose a power-efficient 8-QAM signal constellation and extend it to higher order QAM signal constellations as well; and then we deploy these constellations to reduce the PMEPR in OFDM systems using the constellation expanding idea. All these constellations have less average power compared to the existing constellations like quadrature constellation and therefore are appropriate for PMEPR reduction in OFDM and other discrete multi-tone (DMT) techniques

Keywords

OFDM modulation; quadrature amplitude modulation; DMT technique; OFDM system; PMEPR; discrete multitone; orthogonal frequency division multiplexing; peak-to-mean envelope power ratio; power-efficient M-QAM; quadrature amplitude modulation; signal constellation; Bandwidth; Constellation diagram; Costs; Digital video broadcasting; Distortion; Dynamic range; High power amplifiers; OFDM modulation; Quadrature amplitude modulation; Wireless LAN;

fLanguage

English

Publisher

ieee

Conference_Titel

Personal, Indoor and Mobile Radio Communications, 2005. PIMRC 2005. IEEE 16th International Symposium on

Conference_Location

Berlin

Print_ISBN

9.7838007291e+012

Type

conf

DOI

10.1109/PIMRC.2005.1651618

Filename

1651618