Peak reduction for OFDM by shaping the clipping noise

Author

Saul, Andreas

Author_Institution

DoCoMo Commun. Labs. Eur. GmbH, Munich, Germany

Volume

1

fYear

2004

fDate

26-29 Sept. 2004

Firstpage

443

Abstract

The high peaks of an orthogonal frequency division multiplexing (OFDM) signal are distorted nonlinearly by the high power amplifier (HPA). Clipping techniques can reduce the peaks. Most conventional clipping techniques consider the inter carrier interference (ICI) due to clipping noise to be white and Gaussian distributed. In conclusion it is tried to minimize the interference power. In contrast to that alternative noise distributions are investigated in this paper. A transmitter design based on the active constellation extension (ACE) technique (B.S. Krongold and D.L. Jones, IEEE Trans. on Broadcasting, vol. 49, no. 3. pp. 258-268, 2003) is proposed for shaping the clipping noise accordingly. In comparison to conventional clipping techniques a lower out-of-band (OOB) radiation and a smaller E_b/N₀-degradation can be achieved.

Keywords

Gaussian noise; OFDM modulation; interference (signal); noise; power amplifiers; signal processing; white noise; Gaussian distributed noise; OFDM peak reduction; active constellation extension technique; clipping noise shaping; clipping techniques; high power amplifier; inter carrier interference; interference power; noise distributions; nonlinearly distorted peaks; orthogonal frequency division multiplexing signal; out-of-band radiation; transmitter design; white noise; Distortion; Gaussian noise; High power amplifiers; Interference; Multi-stage noise shaping; Noise reduction; Noise shaping; OFDM; Transmitters; White noise;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2004. VTC2004-Fall. 2004 IEEE 60th

ISSN

1090-3038

Print_ISBN

0-7803-8521-7

Type

conf

DOI

10.1109/VETECF.2004.1400042

Filename

1400042