Input sequence envelope scaling in PAPR reduction of OFDM

Author

Foomooljareon, P. ; Fernando, W.A.C.

Author_Institution

Asian Inst. of Technol., Thailand

Volume

1

fYear

2002

fDate

27-30 Oct. 2002

Firstpage

140

Abstract

Orthogonal frequency division multiplexing or OFDM is a form of multi-carrier modulation technique. High spectral efficiency, robustness to channel fading, immunity to impulse interference, uniform average spectral density, capability of handling very strong echoes and less non linear distortion are among the favorite properties of OFDM. Even though there are many advantages of OFDM it has two main drawbacks: high peak to average power ratio (PAPR) and frequency offset. In this paper, the issue of PAPR in OFDM is discussed. A new algorithm is proposed to reduce PAPR by scaling the input envelope for some sub carriers before they are sent to IFFT. Simulation results show that the PAPR can be reduced by 4 dB.

Keywords

OFDM modulation; 4 dB; OFDM; PAPR reduction; channel fading; frequency offset; impulse interference; input sequence envelope scaling; multi-carrier modulation technique; nonlinear distortion; orthogonal frequency division multiplexing; peak to average power ratio; spectral efficiency; strong echoes; subcarriers; uniform average spectral density; Digital communication; Digital signal processing; Digital video broadcasting; Equations; Fading; OFDM modulation; Peak to average power ratio; Robustness; Signal processing algorithms; Very large scale integration;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Personal Multimedia Communications, 2002. The 5th International Symposium on

ISSN

1347-6890

Print_ISBN

0-7803-7442-8

Type

conf

DOI

10.1109/WPMC.2002.1088148

Filename

1088148