Channel Coding for Underwater Acoustic Communication System

Goalic, André; Trubuil, J.; Beuzelin, Nicolas

doi:10.1109/oceans.2006.307093

Cited by 30 publications

(19 citation statements)

References 3 publications

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“…, − 1}, each different from the index. Define (11) where is the real constant to control the amplification of the differential variation. We choose = 0.5 in our optimization.…”

Section: Initializationmentioning

confidence: 99%

Optimization of LDPC Codes over the Underwater Acoustic Channel

Liu

Song

2016

International Journal of Distributed Sensor Networks

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To combat severe intersymbol interference incurred by multipath propagation of sound waves in the underwater acoustic environment, we introduce an iterative equalization and decoding scheme by iteratively exchanging soft information between a low-density parity check (LDPC) decoder and a decision feedback equalizer. We apply extrinsic information transfer (EXIT) charts to analyze performance of LDPC codes over the acoustic multipath channel. Furthermore, using differential evolution technique, we develop an EXIT-aided method to optimize LDPC codes for the underwater acoustic channel. Design examples are presented for two different realizations of the underwater acoustic channel that are generated by an acoustic ray tracing model. Computer simulations show that the optimized LDPC codes outperform its regular counterpart or Turbo codes under the same coding rate and block length, with gains of 1.0 and 0.8 dB, respectively, at the bit error rate of 10 −5 .

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“…, − 1}, each different from the index. Define (11) where is the real constant to control the amplification of the differential variation. We choose = 0.5 in our optimization.…”

Section: Initializationmentioning

confidence: 99%

Optimization of LDPC Codes over the Underwater Acoustic Channel

Liu

Song

2016

International Journal of Distributed Sensor Networks

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“…Most of the researches are focus on coding schemes of RS codes, convolutional codes and concatenated codes [6][7]. Results on pioneering works of these codes have shown that the use of these coding schemes is practical, but not the best choice, as the development of effective channel coding schemes.…”

Section: Introductionmentioning

confidence: 99%

Application analysis of QC-LDPC codes in shallow water acoustic channels

Chen

Lan

et al. 2011

2011 IEEE International Conference on Signal Processing, Communications and Computing (ICSPCC)

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The shallow water acoustic (SWA) channel is one of the most challenging channels in wireless digital communications. In this paper, we propose a good performance, low complexity channel coding scheme using quasi-cyclic LDPC (QC-LDPC) codes to improve the communication system reliability for SWA channels. A system simulation model including QC-LDPC codes for the SWA channels is built. With the decoding algorithm of belief propagation (BP), the effects of QC-LDPC codes design parameters, such as girth, circulant permutation matrix size and decoding iterations are discussed. To verify the proposed approach, Quangang Xiaocuo harbor blasting data are used to set up a SWA channel model, and the performances of QC-LDPC codes over the channel model are analyzed. The results show that, with the same parameters, the proposed QC-LDPC channel coding strategy for SWA channels substantially outperforms the conventional (3, 6)-LDPC channel coding strategy, and with less complexity and easy implementation.

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“…For example, trellis coded modulation (TCM) was used together with single carrier transmission and equalization in [8]. Convolutional codes and Reed Solomon (RS) codes have been examined in [9] for underwater acoustic communication. In conjunction with spatial multiplexing, Turbo codes were used in [10] for a single-carrier underwater system with multiple transmitters.…”

Section: Introductionmentioning

confidence: 99%

Nonbinary LDPC Coding for Multicarrier Underwater Acoustic Communication

Huang

Zhou

Willett

2008

IEEE J. Select. Areas Commun.

152

123

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Abstract-In this paper, we propose to use nonbinary low density parity check (LDPC) codes to address two main issues in underwater acoustic OFDM communication: i) plain OFDM has poor performance in the presence of channel fading, and ii) OFDM transmission has a high peak-to-average-power ratio (PAPR). We propose new methods to construct nonbinary irregular LDPC codes that achieve excellent performance, match well with the underlying modulation, and can be encoded in linear time and in parallel. Simulation and experimental results confirm the excellent performance of the proposed nonbinary LDPC codes. Based on the property that the generator matrix of LDPC codes has high density, we further show how to reduce the PAPR considerably with minimal overhead.

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Channel Coding for Underwater Acoustic Communication System

Cited by 30 publications

References 3 publications

Optimization of LDPC Codes over the Underwater Acoustic Channel

Optimization of LDPC Codes over the Underwater Acoustic Channel

Application analysis of QC-LDPC codes in shallow water acoustic channels

Nonbinary LDPC Coding for Multicarrier Underwater Acoustic Communication

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