Free subcarrier optimization for peak-to-average power ratio minimization in OFDM systems

Author

Liu, Qijia ; Baxley, Robert J. ; Zhou, G. Tong

Author_Institution

Sch. of Electr. & Comput. Eng., Georgia Tech. Res. Inst., Atlanta, GA

fYear

2008

fDate

March 31 2008-April 4 2008

Firstpage

3073

Lastpage

3076

Abstract

Peak-to-average power ratio (PAR) reduction techniques are often employed to increase the power efficiency of orthogonal frequency division multiplexing (OFDM) systems. A recently proposed PAR optimization method demonstrates how the PAR can be minimized when free subcarriers and a certain distortion allowance on the error vector magnitude (EVM) are available. In this paper, we derive the lower bound on the capacity for such a system and investigate the capacity- maximizing number of free subcarriers that should be used.

Keywords

OFDM modulation; minimisation; OFDM systems; error vector magnitude; free subcarrier optimization; orthogonal frequency division multiplexing; peak-to-average power ratio minimization; power efficiency; Channel capacity; Frequency division multiplexing; Nonlinear distortion; OFDM; Optimization methods; Peak to average power ratio; Power engineering and energy; Power engineering computing; Signal analysis; Signal to noise ratio; Orthogonal frequency division multiplexing (OFDM); peak-to-average power ratio (PAR); signal-tonoise-and-distortion ratio (SNDR);

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech and Signal Processing, 2008. ICASSP 2008. IEEE International Conference on

Conference_Location

Las Vegas, NV

ISSN

1520-6149

Print_ISBN

978-1-4244-1483-3

Electronic_ISBN

1520-6149

Type

conf

DOI

10.1109/ICASSP.2008.4518299

Filename

4518299