A bandwidth efficient precode to reduce intercarrier interference in OFDM

Author

Yun, Jae Yeun ; Lee, Yong H.

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., Korea Adv. Inst. of Sci. & Technol., Daejeon, South Korea

Volume

2

fYear

2004

fDate

17-19 May 2004

Firstpage

944

Abstract

A bandwidth efficient precode that can reduce the intercarrier interference (ICI) in orthogonal frequency division multiplexing (OFDM) systems is developed by modifying the existing rate-1/2 precodes. It is a rate-(k-1)/k code which is based on the assumption that neighboring off-diagonal elements of the frequency domain channel matrix are almost identical. The effect of precoding on OFDM system performance is examined through computer simulation. The results indicate that considerable performance improvement can be achieved by employing the proposed precoding, as compared with the conventional systems with/without precoding.

Keywords

OFDM modulation; channel estimation; codes; fading channels; interference suppression; ICI reduction; OFDM system precoding; bandwidth efficient precode; channel estimation; fast fading channel; frequency domain channel matrix off-diagonal elements; half-rate code; intercarrier interference; Bandwidth; Channel estimation; Computer simulation; Degradation; Fading; Frequency domain analysis; Interference; OFDM; System performance; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2004. VTC 2004-Spring. 2004 IEEE 59th

ISSN

1550-2252

Print_ISBN

0-7803-8255-2

Type

conf

DOI

10.1109/VETECS.2004.1388969

Filename

1388969