Iterative equalization and decoding techniques for shallow water acoustic channels

Author

Sözer, E.M. ; Proakis, J.G. ; Blackmon, F.

Author_Institution

Dept. of Electr. & Comput. Eng., Northeastern Univ., Boston, MA, USA

Volume

4

fYear

2001

fDate

2001

Firstpage

2201

Abstract

We investigate the application of iterative equalization and decoding techniques to the shallow water acoustic channel. The first receiver is a joint decision feedback equalizer (DFE) and turbo decoder. The second receiver is a turbo equalizer, which jointly estimates the channel, performs MAP equalization, and decodes received symbols. Although the MAP equalizer is optimum for a known channel, channel estimation errors degrade the performance of the turbo equalizer. We compared the performance of both receivers under real channel conditions

Keywords

acoustic receivers; decision feedback equalisers; iterative decoding; maximum likelihood decoding; multipath channels; turbo codes; underwater acoustic communication; DFE; MAP equalization; channel conditions; channel estimation errors; iterative decoding; iterative equalization; joint decision feedback equalizer; multipath spreads; receiver; shallow water acoustic channels; turbo decoder; turbo equalizer; AWGN; Bit error rate; Channel estimation; Decision feedback equalizers; Degradation; Demodulation; Iterative decoding; Modems; Turbo codes; Underwater acoustics;

fLanguage

English

Publisher

ieee

Conference_Titel

OCEANS, 2001. MTS/IEEE Conference and Exhibition

Conference_Location

Honolulu, HI

Print_ISBN

0-933957-28-9

Type

conf

DOI

10.1109/OCEANS.2001.968339

Filename

968339