Title :
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
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;
Conference_Titel :
OCEANS '02 MTS/IEEE
Print_ISBN :
0-7803-7534-3
DOI :
10.1109/OCEANS.2002.1192007
