Residual ISI cancellation for OFDM with applications to HDTV broadcasting

Author

Kim, Dukhyun ; Stüber, Gordon L.

Author_Institution

Dept. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA

Volume

16

Issue

8

fYear

1998

fDate

10/1/1998 12:00:00 AM

Firstpage

1590

Lastpage

1599

Abstract

An iterative technique is developed for orthogonal frequency division multiplexing (OFDM) systems to mitigate the residual intersymbol interference (ISI) that exceeds the length of the guard interval. The technique, called residual ISI cancellation (RISIC), uses a combination of tail cancellation and cyclic restoration and is shown to offer large performance improvements. The effects of imperfect channel estimation are also considered. The RISIC algorithm is applied to a typical terrestrial high-definition television (HDTV) broadcasting system that uses a concatenated coding scheme for error control. Results show that the RISIC algorithm can effectively mitigate residual ISI on static or slowly fading ISI channels

Keywords

concatenated codes; fading channels; high definition television; interference suppression; intersymbol interference; iterative methods; parameter estimation; television broadcasting; television interference; HDTV broadcasting; OFDM systems; RISIC algorithm; concatenated coding; cyclic restoration; error control; guard interval length; imperfect channel estimation; intersymbol interference; iterative technique; orthogonal frequency division multiplexing; residual ISI cancellation; slowly fading ISI channels; static fading ISI channels; tail cancellation; terrestrial high-definition television; trellis codes; Bandwidth; Concatenated codes; Echo cancellers; Error analysis; Fast Fourier transforms; HDTV; Interchannel interference; Intersymbol interference; OFDM; TV broadcasting;

fLanguage

English

Journal_Title

Selected Areas in Communications, IEEE Journal on

Publisher

ieee

ISSN

0733-8716

Type

jour

DOI

10.1109/49.730464

Filename

730464