Combined turbo equalization and turbo decoding

Author

Raphaeli, Dan ; Zarai, Yoram

Author_Institution

Dept. of Electron. Syst., Tel Aviv Univ., Israel

Volume

2

Issue

4

fYear

1998

fDate

4/1/1998 12:00:00 AM

Firstpage

107

Lastpage

109

Abstract

In this letter, the subject of turbo coding in the presence of an intersymbol interference channel is investigated. An iterative decoder structure is presented, which combines channel equalization and turbo decoding. At each iteration extrinsic information from the channel detector is fed into the turbo decoders, and then their extrinsic information is fed back to the channel detector. Simulation results are presented for a rate 1/2 turbo code with binary phase-shift keying (BPSK) modulation, transmitted over an intersymbol interference (ISI) channel having severe frequency distortion. The performance is about 0.8 dB from the ISI channel capacity at a bit-error rate of 10/sup -5/.

Keywords

channel coding; decoding; equalisers; feedback; intersymbol interference; iterative methods; phase shift keying; telecommunication channels; BPSK; binary phase-shift keying modulation; bit-error rate; channel capacity; channel detector; channel equalization; frequency distortion; intersymbol interference channel; iterative decoder structure; performance; rate 1/2 turbo code; turbo decoding; turbo equalization; Binary phase shift keying; Detectors; Frequency; Intersymbol interference; Iterative decoding; Modulation coding; Phase distortion; Phase modulation; Phase shift keying; Turbo codes;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/4234.664220

Filename

664220