NDLI: Frequency-domain turbo equalization for MIMO underwater acoustic communications

Content Provider	IEEE Xplore Digital Library
Author	Jian Zhang Zheng, Y.R. Chengshan Xiao
Copyright Year	2009
Description	Author affiliation: Dept. of Electrical & Computer Eng., Missouri University of Science & Technology, Rolla, 65409, USA (Jian Zhang; Zheng, Y.R.; Chengshan Xiao)
Abstract	This paper investigates a low-complexity frequencydomain turbo equalization (FDTE) based on linear minimum mean square error (LMMSE) criterion for single-carrier (SC) multiple-input multiple-output (MIMO) underwater acoustic communications (UAC). The receiver incorporates both the equalizer and the decoder which exchange the extrinsic information on the coded bits for each other to implement the iterative detection. The channel impulse responses (CIRs) required in the equalization are estimated in the frequency domain (FD) by inserting the well-designed pilot blocks which are frequency-orthogonal Chu sequences. The proposed SC-MIMO-FDTE architecture is applied to the fixed-to-fixed underwater data gathered during SPACE08 ocean experiments in October 2008, where multiple transducers and hydrophones are deployed in communication ranges of 200m and 1000m, and the channel bandwidth is 9.765625 kHz. The phase shift keying (PSK) signals are transmitted from multiple transducers in various block sizes. The proposed transceiver has been demonstrated to improve the bit-error-rate (BER) performance significantly by processing the QPSK data blocks with block length of 1024 in 200m and 1000m ranges. The average BERs obtained by turbo detection with 3 iterations can achieve approximately 1.4 × $10^{−4}$ for the 200m system and 4.4 × $10^{−5}$ for the 1000m system.
Starting Page	1
Ending Page	5
File Size	652009
Page Count	5
File Format	PDF
ISBN	9781424425228
DOI	10.1109/OCEANSE.2009.5278227
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-05-11
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	MIMO Underwater acoustics Underwater communication Frequency estimation Transducers Phase shift keying Mean square error methods Equalizers Iterative decoding Acoustic signal detection
Content Type	Text
Resource Type	Article

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