Iterative equalization, decoding, and soft diversity combining for underwater acoustic channels

Author

Blackmon, F. ; Sozer, E. ; Proakis, I.

Author_Institution

Naval Undersea Warfare Center, Newport, RI, USA

Volume

4

fYear

2002

fDate

29-31 Oct. 2002

Firstpage

2425

Abstract

The performance of iterative equalization, decoding, and soft diversity combining in underwater acoustic channels is studied. A decision feedback equalizer (DFE) is employed instead of a MAP equalizer to reduce the complexity of the iterative algorithm. The performance of a soft diversity combining scheme, where multiple DFEs are employed for spatial diversity or time diversity as well as a DFE with multiple feedforward filters is presented. The proposed receiver structures are tested and compared using experimental data.

Keywords

decision feedback equalisers; diversity reception; feedforward; iterative decoding; oceanographic techniques; underwater acoustic communication; DFE; MAP equalizer; decision feedback equalizer; decoding; iterative algorithm complexity; iterative equalization; multiple feedforward filter; proposed receiver structure; soft diversity combining scheme; spatial diversity; time diversity; underwater acoustic channel; Acoustic testing; Acoustical engineering; Decision feedback equalizers; Diversity reception; Iterative algorithms; Iterative decoding; Military computing; Quadrature phase shift keying; Underwater acoustics; Viterbi algorithm;

fLanguage

English

Publisher

ieee

Conference_Titel

OCEANS '02 MTS/IEEE

Print_ISBN

0-7803-7534-3

Type

conf

DOI

10.1109/OCEANS.2002.1192007

Filename

1192007