Coding for intersymbol interference channels-combined coding and precoding

Author

Laroia, Rajiv

Author_Institution

AT&T Bell Labs., Murray Hill, NJ, USA

Volume

42

Issue

4

fYear

1996

fDate

7/1/1996 12:00:00 AM

Firstpage

1053

Lastpage

1061

Abstract

This paper describes a new coding scheme for transmission over intersymbol interference (ISI) channels. This scheme, called ISI coding, combines trellis coding with precoding (used to combat ISI). Like the recently introduced precoding scheme of Laroia, Tretter, and Farvardin (LTF), the ISI coder makes it possible to achieve both shaping and coding gains over ISI channels. By combining coding and precoding, however, the ISI coder makes the “precoding loss” independent of the number of coset partitions used to generate the trellis code. At high rates (large signal-to-noise ratio (SNR)), this makes it possible to approach the Shannon capacity of an ISI channel. The V.34 (formerly V.fast) international modem standard for high-speed (up to 28.8 kb/s) communication over voice-band telephone lines uses the version of the ISI coder described in Section IV of this paper

Keywords

intersymbol interference; telecommunication channels; trellis codes; 28.8 kbit/s; ISI coding; LTF precoder; SNR; Shannon capacity; TH precoder; V.34 international modem standard; coding gain; constellation shaping; coset partitions; high-speed communication; intersymbol interference channels; shaping gains; transmission; trellis coding; trellis precoding; voice-band telephone lines; Additive white noise; Channel capacity; Communication systems; Convolutional codes; Decoding; Delay; Intersymbol interference; Matched filters; Nonlinear filters; Transfer functions;

fLanguage

English

Journal_Title

Information Theory, IEEE Transactions on

Publisher

ieee

ISSN

0018-9448

Type

jour

DOI

10.1109/18.508832

Filename

508832