A precoding scheme for DFT-based OFDM to suppress sidelobes

Author

Xu, Renhui ; Chen, Ming

Author_Institution

Inst. of Commun. Eng., PLA Univ. of Sci. & Technol., Nanjing, China

Volume

13

Issue

10

fYear

2009

fDate

10/1/2009 12:00:00 AM

Firstpage

776

Lastpage

778

Abstract

In spectrum pooling scenario, the spectral leakage of DFT-based OFDM signal can be divided into in-band-out-of-subband (IBOSB) radiation and out-of-band (OOB) radiation. A precoding scheme is proposed to suppress the IBOSB sidelobes. The precoding design is based on the generalized eigenvalue problem. Simulation results demonstrate that the proposed scheme can suppress the sidelobes significantly in contrast to the uncoded schemes. At the same time, the bit-error-rate (BER) performance of the precoded system over multipath fading channel is improved due to the frequency diversity.

Keywords

OFDM modulation; discrete Fourier transforms; diversity reception; eigenvalues and eigenfunctions; fading channels; multipath channels; precoding; signal processing; DFT; OFDM; frequency diversity; generalized eigenvalue problem; in-band-out-of-subband radiation; multipath fading channel; out-of-band radiation; precoding scheme; sidelobe suppression; spectral leakage; spectrum pooling; Bit error rate; Discrete Fourier transforms; Eigenvalues and eigenfunctions; Fading; Frequency diversity; Interference; Mobile communication; OFDM; Signal analysis; Transmitters; OFDM, DFT, precoding, power spectrum.;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2009.091339

Filename

5288460