MIMO-OFDM underwater acoustic communication systems—A review

Qiao, Gang; Babar, Zeeshan; Ma, Lu; Liu, Songzuo; Wu, Jinqiu

doi:10.1016/j.phycom.2017.02.007

Cited by 83 publications

(42 citation statements)

References 54 publications

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“…Marine media are very complex sound propagation channels that are subject to various natural conditions, geographical conditions, and random factors, which makes their physical properties very complex and unstable and causes delays, distortions, loss, and other changes in the transmission of underwater acoustic signals, loss, and other changes, which become the key factors affecting the transmission of sound waves underwater [32].…”

Section: Oa-uwsn Mac Protocol Simulation Environment Settingsmentioning

confidence: 99%

A Novel Energy-Efficient Contention-Based MAC Protocol Used for OA-UWSN

Wang

Shen

Shi

et al. 2019

Sensors

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A hybrid optical-acoustic underwater wireless sensor network (OA-UWSN) was proposed to solve the problem of high-speed transmission of real-time video and images in marine information detection. This paper proposes a novel energy-efficient contention-based media access control (MAC) protocol (OA-CMAC) for the OA-UWSN. Based on optical-acoustic fusion technology, our proposed OA-CMAC combines the postponed access mechanism in carrier sense multiple access with collision avoidance (CSMA/CA) and multiplexing-based spatial division multiple access (SDMA) technology to achieve high-speed and real-time data transmission. The protocol first performs an acoustic handshake to obtain the location information of a transceiver node, ensuring that the channel is idle. Otherwise, it performs postponed access and waits for the next time slot to contend for the channel again. Then, an optical handshake is performed to detect whether the channel condition satisfies the optical transmission, and beam alignment is performed at the same time. Finally, the nodes transmit data using optical communication. If the channel conditions do not meet the requirements for optical communication, a small amount of data with high priority is transmitted through acoustic communication. An evaluation of the proposed MAC protocol was performed with OMNeT++ simulations. The results showed that when the optical handshaking success ratio was greater than 50%, compared to the O-A handshake protocol in the literature, our protocol could result in doubled throughput. Due to the low energy consumption of optical communication, the node’s lifetime is 30% longer than that of pure acoustic communication, greatly reducing the network operation cost. Therefore, it is suitable for large-scale underwater sensor networks with high loads.

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Section: Oa-uwsn Mac Protocol Simulation Environment Settingsmentioning

confidence: 99%

A Novel Energy-Efficient Contention-Based MAC Protocol Used for OA-UWSN

Wang

Shen

Shi

et al. 2019

Sensors

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“…Furthermore, in reference [22], pilot-assisted channel estimation was performed based on the hard feedback method. We used soft feedback and OMP channel estimation, which obviously improves the channel estimation performance [23]. This improved decision feedback method based on the cost function is given by:…”

Section: Cost Function Controlled Soft Information Feedbackmentioning

confidence: 99%

Low-Complexity Progressive MIMO-OFDM Receiver for Underwater Acoustic Communication

et al. 2019

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Multiple Input Multiple Output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) proves to be a better choice for high speed underwater acoustic (UWA) communication as it increases the data rate and solves the bandwidth limitation issue; however, at the same time, it increases the design challenges and complexity of the receivers. Inter-Symbol Interference (ISI) and Inter-Carrier Interference (ICI) are introduced in the received signal by the extended multipath and Doppler shifts along with different types of noises due to the noisy acoustic channel. Here we propose two iterative receivers: one is ICI unaware iterative MIMO-OFDM receiver, which uses a novel cost function threshold based soft information decision feedback method. The second one is ICI aware progressive iterative MIMO-OFDM receiver, which adapts and increases the progressions according to the level of ICI present in the received signal, while fully utilizing the soft information from the previous iterations, therefore reducing the complexity. Orthogonal Matching pursuit (OMP) channel estimation, low density parity check (LDPC) decoding and minimum mean square error (MMSE) equalization schemes are exploited by both the receivers. The proposed receivers are analyzed and compared with the standard Alamouti MIMO receiver as a reference and also compared with the non-iterative, basic turbo iterative and non-progressive iterative MIMO receivers. Simulations and experimental results prove the efficiency and effectiveness of the proposed receivers.

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“…Acoustic systems have enjoyed great success under water owing to their ability to communicate over many kilometers pushing the research in this field with the aim to further improve this technology. Extensive studies are conducted to improve the performance of the acoustic communication channels [3][4][5][6][7]. Nevertheless, its performance is linked to the physical nature that limits the bandwidth, causes high latency, produces high transmission losses, time varying multi-path propagation and Doppler's spread [8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Underwater Optical Wireless Communications: Overview

Spagnolo

Cozzella

Leccese

2020

Sensors

209

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Underwater Optical Wireless Communication (UOWC) is not a new idea, but it has recently attracted renewed interest since seawater presents a reduced absorption window for blue-green light. Due to its higher bandwidth, underwater optical wireless communications can support higher data rates at low latency levels compared to acoustic and RF counterparts. The paper is aimed at those who want to undertake studies on UOWC. It offers an overview on the current technologies and those potentially available soon. Particular attention has been given to offering a recent bibliography, especially on the use of single-photon receivers.

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MIMO-OFDM underwater acoustic communication systems—A review

Cited by 83 publications

References 54 publications

A Novel Energy-Efficient Contention-Based MAC Protocol Used for OA-UWSN

A Novel Energy-Efficient Contention-Based MAC Protocol Used for OA-UWSN

Low-Complexity Progressive MIMO-OFDM Receiver for Underwater Acoustic Communication

Underwater Optical Wireless Communications: Overview

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