Effectiveness of Convolutional Code in Multipath Underwater Acoustic Channel

Park, Jihyun; Seo, Chulwon; Park, Kyu-Chil; Yoon, Jong Rak

doi:10.7567/jjap.52.07hg01

Cited by 9 publications

(9 citation statements)

References 12 publications

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“…It was concluded that other than BER improvements, the PAPR of an OFDM system is significantly reduced when ciphered BCH codes are utilized. Park et al [ 15 ] have assessed the forward error correction capabilities of convolutional codes of code rate

in the presence of multipath in underwater acoustic channels. The authors suggest the proposed convolutional codes for OFDM in multipath channel without equalizers in a slow-moving scenario.…”

Section: Literature Reviewmentioning

confidence: 99%

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Coded-GFDM for Reliable Communication in Underwater Acoustic Channels

Murad

Tasadduq

Otero

2022

Sensors

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The performance of the coded generalized frequency division multiplexing (GFDM) transceiver has been evaluated in a shallow underwater acoustic channel (UAC). Acoustic transmission is the scheme of choice for communication in UAC since radio waves suffer from absorption and light waves scatter. Although orthogonal frequency division multiplexing (OFDM) has found its ground for multicarrier acoustic underwater communication, it suffers from high peak to average power ratio (PAPR) and out of band (OOB) emissions. We propose a coded-GFDM based multicarrier system since GFDM has a higher spectral efficiency compared to a traditional OFDM system. In doing so, we assess two block codes, namely Bose, Chaudari, and Hocquenghem (BCH) codes, Reed-Solomon (RS) codes, and several convolutional codes. We present the error performances of these codes when used with GFDM. Furthermore, we evaluate the performance of the proposed system using two equalizers: Matched Filter (MF) and Zero-Forcing (ZF). Simulation results show that among the various block coding schemes that we tested, BCH (31,6) and RS (15,3) give the best error performance. Among the convolutional codes that we tested, rate 1/4 convolutional codes give the best performance. However, the performance of BCH and RS codes is much better than the convolutional codes. Moreover, the performance of the ZF equalizer is marginally better than the MF equalizer. In conclusion, using the channel coding schemes with GFDM improves error performance manifolds thereby increasing the reliability of the GFDM system despite slightly higher complexity.

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in the presence of multipath in underwater acoustic channels. The authors suggest the proposed convolutional codes for OFDM in multipath channel without equalizers in a slow-moving scenario.…”

Section: Literature Reviewmentioning

confidence: 99%

“…Channel coding techniques such as forward error correction codes (FEC) have long been used for reliable transmission in wireless communication systems [ 14 , 15 ]. The data-rate is reduced due to the coding overhead and requires an increase in bandwidth.…”

Section: Introductionmentioning

confidence: 99%

Coded-GFDM for Reliable Communication in Underwater Acoustic Channels

Murad

Tasadduq

Otero

2022

Sensors

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“…Convolution codes and Reed Solomon block codes are commonly used for real-time underwater acoustic communication system due to their simplicity. These codes were still not adequate to satisfy the BER requirement [11, 12]. Space-time trellis codes, layered space-time codes, and their combinations scheme were developed for high reliability and high data rate communications [13].…”

Section: Introductionmentioning

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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“…The time diversity technique such as a convolution code(CC) and Reed-Solomon(RS) code has been applied in underwater acoustic communication systems [6][7][8]. The error correcting capability of CC is found to be better than RS in frequency non-selective multipath channel but vice versa in frequency selective channel.…”

Section: ⅰ Introductionmentioning

confidence: 99%

Multipath Fading Channel Characterization and Performances of Forward Error Correction Codes in Very Shallow Water

Bae¹,

Xue²,

Park³

et al. 2015

Journal of the Korea Institute of Information and Communication

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In very shallow water acoustic communication channel, underwater acoustic (UWA) communication signal is observed as frequency selective fading signal due to time-varying multipath. This induces a time and frequency dependent inter-symbol-interference (ISI) and degrades the UWA system performance. There is no study about how the performances of the error correction codes are related to a multipath fading statistics in very shallow water. In this study, the characteristics of very shallow water multipath fading channel is analyzed and the performances of two different forward error correction (FEC) codes are compared. The convolution code (CC) and Reed-Solomon (RS) code are adopted. Sea experimental results show that RS code is better choice than CC in frequency selective channel with fading.

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Effectiveness of Convolutional Code in Multipath Underwater Acoustic Channel

Cited by 9 publications

References 12 publications

Coded-GFDM for Reliable Communication in Underwater Acoustic Channels

Coded-GFDM for Reliable Communication in Underwater Acoustic Channels

Optimization of LDPC Codes over the Underwater Acoustic Channel

Multipath Fading Channel Characterization and Performances of Forward Error Correction Codes in Very Shallow Water

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