TY - JOUR
T1 - High-rate communication for underwater acoustic channels using multiple transmitters and space - Time coding
T2 - Receiver structures and experimental results
AU - Roy, Subhadeep
AU - Duman, Tolga M.
AU - McDonald, Vincent
AU - Proakis, John G.
N1 - Funding Information:
Manuscript received April 18, 2005; revised January 29, 2006; accepted February 22, 2007. This work was supported in part by the SPAWAR under In-house Laboratory Independent Research (ILIR) program and the U.S. Office of Naval Research (ONR) under SignalEx project for the construction of the MIMO transmit system. The 2005 Makai Experiment was primarily sponsored by the U.S. ONR under High Frequency Initiative. Associate Editor: R. C. Spindel. S. Roy is with the Qualcomm, Bridgewater, NJ 08807 USA (e-mail: sub-hadeep@qualcomm.com). T. M. Duman is with the Electrical Engineering Department, Arizona State University, Tempe, AZ 85287-9309 USA. V. McDonald is with the Space and Naval Warfare Systems Center (SPAWAR), San Diego, CA 92152 USA. J. G. Proakis is with the University of California at San Diego, La Jolla, CA 92093 USA and also with the Northeastern University, Boston, MA 02115 USA. Color versions of one or more of the figures in this paper are available online at http://ieeexplore.ieee.org. Digital Object Identifier 10.1109/JOE.2007.899275
PY - 2007/7
Y1 - 2007/7
N2 - In this paper, we consider the use of multiple antennas and space-time coding for high data rate underwater acoustic (UWA) communications. Recent advances in information theory have shown that significant capacity gains can be achieved by using multiple-input-multiple-output (MIMO) systems and space-time coding techniques for rich scattering environments. This is especially significant for the UWA channel where the usable bandwidth is severely limited due to frequency-dependent attenuation. In this paper, we propose to use space-time coding and iterative decoding techniques to obtain high data rates and reliability over shallow-water, medium-range UWA channels. In particular, we propose to use space-time trellis codes (STTCs), layered space-time codes (LSTCs) and their combinations along with three low-complexity adaptive equalizer structures at the receiver. We consider multiband transmissions where the available bandwidth is divided into several subbands with guard bands in between them. We describe the theoretical basis of the proposed receivers along with a comprehensive set of experimental results obtained by processing data collected from real UWA communications experiments carried out in the Pacific Ocean. We demonstrate that by using space-time coding at the transmitter and sophisticated iterative processing at the receiver, we can obtain data rates and spectral efficiencies that are not possible with single transmitter systems at similar ranges and depths. In particular, we have demonstrated reliable transmission at a data rate of 48 kb/s in 23 kHz of bandwidth, and 12 kb/s in 3 kHz of bandwidth (a spectral efficiency of 4 b-s-1·Hz-1) at a 2-km range.
AB - In this paper, we consider the use of multiple antennas and space-time coding for high data rate underwater acoustic (UWA) communications. Recent advances in information theory have shown that significant capacity gains can be achieved by using multiple-input-multiple-output (MIMO) systems and space-time coding techniques for rich scattering environments. This is especially significant for the UWA channel where the usable bandwidth is severely limited due to frequency-dependent attenuation. In this paper, we propose to use space-time coding and iterative decoding techniques to obtain high data rates and reliability over shallow-water, medium-range UWA channels. In particular, we propose to use space-time trellis codes (STTCs), layered space-time codes (LSTCs) and their combinations along with three low-complexity adaptive equalizer structures at the receiver. We consider multiband transmissions where the available bandwidth is divided into several subbands with guard bands in between them. We describe the theoretical basis of the proposed receivers along with a comprehensive set of experimental results obtained by processing data collected from real UWA communications experiments carried out in the Pacific Ocean. We demonstrate that by using space-time coding at the transmitter and sophisticated iterative processing at the receiver, we can obtain data rates and spectral efficiencies that are not possible with single transmitter systems at similar ranges and depths. In particular, we have demonstrated reliable transmission at a data rate of 48 kb/s in 23 kHz of bandwidth, and 12 kb/s in 3 kHz of bandwidth (a spectral efficiency of 4 b-s-1·Hz-1) at a 2-km range.
KW - Iterative equalization
KW - Multiple-input-multiple-output (MIMO)
KW - Space-time codes
KW - Successive interference cancellation (SIC)
KW - Turbo codes
KW - Underwater acoustic (UWA) communications
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U2 - 10.1109/JOE.2007.899275
DO - 10.1109/JOE.2007.899275
M3 - Article
AN - SCOPUS:40449106452
SN - 0364-9059
VL - 32
SP - 663
EP - 688
JO - IEEE Journal of Oceanic Engineering
JF - IEEE Journal of Oceanic Engineering
IS - 3
ER -