naa a22 4500 510792928 CHVBK 20180411083326.0 cr unu---uuuuu 180411e20130701xx s 000 0 eng 10.1007/s11277-012-0869-y doi (NATIONALLICENCE)springer-10.1007/s11277-012-0869-y Time-Domain Block and Per-Tone Equalization for MIMO-OFDM in Shallow Underwater Acoustic Communication [Elektronische Daten] [Mojtaba Beheshti, Mohammad Omidi, Ali Doost-Hoseini] Shallow underwater acoustic (UWA) channel exhibits rapid temporal variations, extensive multipath spreads, and severe frequency-dependent attenuations. So, high data rate communication with high spectral efficiency in this challenging medium requires efficient system design. Multiple-input multiple-output orthogonal frequency-division multiplexing (MIMO-OFDM) is a promising solution for reliable transmission over highly dispersive channels. In this paper, we study the equalization of shallow UWA channels when a MIMO-OFDM transmission scheme is used. We address simultaneously the long multipath spread and rapid temporal variations of the channel. These features lead to interblock interference (IBI) along with intercarrier interference (ICI), thereby degrading the system performance. We describe the underwater channel using a general basis expansion model (BEM), and propose time-domain block equalization techniques to jointly eliminate the IBI and ICI. The block equalizers are derived based on minimum mean-square error and zero-forcing criteria. We also develop a novel approach to design two time-domain per-tone equalizers, which minimize bit error rate or mean-square error in each subcarrier. We simulate a typical shallow UWA channel to demonstrate the desirable performance of the proposed equalization techniques in Rayleigh and Rician fading channels. Springer Science+Business Media New York, 2012 Underwater acoustic channel nationallicence Multiple-input multiple-output (MIMO) nationallicence Orthogonal frequency division multiplexing (OFDM) nationallicence Basis expansion model (BEM) nationallicence Equalization nationallicence Beheshti Mojtaba Information and Communication Technology Institute, Isfahan University of Technology, Isfahan, Iran aut Omidi Mohammad Department of Electrical and Computer Engineering, Isfahan University of Technology, Isfahan, Iran aut Doost-Hoseini Ali Department of Electrical and Computer Engineering, Isfahan University of Technology, Isfahan, Iran aut Wireless Personal Communications Springer US; http://www.springer-ny.com 71/2(2013-07-01), 1193-1215 0929-6212 71:2<1193 2013 71 11277 https://doi.org/10.1007/s11277-012-0869-y text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11277-012-0869-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Beheshti Mojtaba Information and Communication Technology Institute, Isfahan University of Technology, Isfahan, Iran aut NATIONALLICENCE 700 1- Omidi Mohammad Department of Electrical and Computer Engineering, Isfahan University of Technology, Isfahan, Iran aut NATIONALLICENCE 700 1- Doost-Hoseini Ali Department of Electrical and Computer Engineering, Isfahan University of Technology, Isfahan, Iran aut NATIONALLICENCE 773 0- Wireless Personal Communications Springer US; http://www.springer-ny.com 71/2(2013-07-01), 1193-1215 0929-6212 71:2<1193 2013 71 11277 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer