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Underwater Distributed Antenna Systems: Design Opportunities and Challenges

Published on Oct 1, 2018in IEEE Communications Magazine10.36
· DOI :10.1109/MCOM.2017.1601071
Zhaohui Wang15
Estimated H-index: 15
,
Shengli Zhou52
Estimated H-index: 52
,
Zhengdao Wang1
Estimated H-index: 1
Cite
Abstract
Underwater systems for ocean exploration and monitoring consist of a mix of geographically distributed stationary infrastructure and mobile units. The stationary infrastructure could be bottom-anchored nodes and surface buoys that are connected to a control center via cables and in-air radio links. Both the stationary and mobile units can be equipped with acoustic communication modules for underwater wireless data transmission. With the backbone (cable or radio) connection, those acoustic communication modules naturally form an underwater DAS. Similar to the DAS in terrestrial radio networks, the underwater DAS supports larger acoustic communication coverage and higher network throughput compared to the CAS. Furthermore, the characteristics of underwater acoustic channels, such as the frequency-dependent signal absorption loss and the low sound speed in water, lead to unique design challenges and unforeseen opportunities in the underwater DAS. This article examines both theoretical and system design issues pertaining to the underwater DAS, including operation strategies, communication algorithms and mobile node positioning, and pinpoints future research directions to fully realize its potentials.
  • References (12)
  • Citations (3)
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References12
Newest
Published on Dec 1, 2016in IEEE Transactions on Signal Processing5.23
Chaofeng Wang2
Estimated H-index: 2
(MTU: Michigan Technological University),
Zhaohui Wang15
Estimated H-index: 15
(MTU: Michigan Technological University)
Underwater acoustic networked systems often consist of geographically distributed antenna elements (DAEs) that are connected via cables or high-rate radio links (e.g., bottom-anchored nodes or surface buoys). This paper investigates countermeasures against eavesdropping attack in the coordinated multipoint (CoMP) transmission of DAEs to an underwater legitimate user. Exploiting the low sound speed in water and the spatial diversity of DAEs, we propose signal alignment for transmission secrecy, w...
Published on Mar 1, 2016in IEEE Transactions on Vehicular Technology5.34
Saed Daoud2
Estimated H-index: 2
(Concordia University),
Ali Ghrayeb18
Estimated H-index: 18
(Concordia University)
In this paper, we study the performance of single carrier (SC) modulation with frequency-domain equalization (FDE) over underwater acoustic (UWA) channels. The underlying channels are time-varying intersymbol interference (ISI) channels, where time variation arises from the relative motion between the transceivers, which induces one or more Doppler scaling factors. We study two scenarios: a point-to-point (P2P) system, where each cluster of paths has its own distinct Doppler scaling factor, and ...
Published on Mar 1, 2016in Physical Communication1.45
Patrick Carroll3
Estimated H-index: 3
(UConn: University of Connecticut),
Katherine Domrese3
Estimated H-index: 3
(UConn: University of Connecticut)
+ 2 AuthorsPeter Willett47
Estimated H-index: 47
(UConn: University of Connecticut)
In this paper, we consider a problem of localizing a moving object in the context of an underwater distributed antenna system. All the distributed nodes record the time-of-arrivals of a single message from the moving object and obtain the Doppler speed estimates used in the decoding process. Conventional methods have relied only on the time-of-arrival measurements to obtain position estimates, on top of which filtering methods can be further applied for tracking purposes. In this work, we explor...
Published on Nov 12, 2014
Huacheng Zeng7
Estimated H-index: 7
(VT: Virginia Tech),
Y. Thomas Hou51
Estimated H-index: 51
(VT: Virginia Tech)
+ 3 AuthorsScott F. Midkiff29
Estimated H-index: 29
(VT: Virginia Tech)
A fundamental issue of underwater acoustic (UWA) communications is large propagation delays due to water medium. A new direction to address this issue is to take advantage of large propagation delays rather than enduring them as a disadvantage. Recent advances in time-based interference alignment (IA), or propagation delay (PD)-based IA, offer a new potential to turn the adverse effect of large propagation delays into something that is beneficial to throughput improvement. The goal of this paper...
Published on Jul 1, 2014in IEEE Transactions on Signal Processing5.23
Patrick Carroll3
Estimated H-index: 3
(UConn: University of Connecticut),
Kaleel Mahmood4
Estimated H-index: 4
(UConn: University of Connecticut)
+ 3 AuthorsJun-Hong Cui40
Estimated H-index: 40
(UConn: University of Connecticut)
In this paper we consider the issue of localization in the context of underwater sensor networks which contain anchor nodes with perfect knowledge of their position, but asynchronous clocks. By taking advantage of a sequential transmission protocol and the broadcasting nature of the acoustic underwater medium, the entire network can be localized simultaneously with small overhead. Additionally, it can be initiated by any node at any time. Through extensive simulation and derivation of the Cramer...
Published on Apr 1, 2013in IEEE Journal of Oceanic Engineering2.57
Jianzhong Huang8
Estimated H-index: 8
(UConn: University of Connecticut),
Shengli Zhou52
Estimated H-index: 52
(UConn: University of Connecticut),
Zhaohui Wang15
Estimated H-index: 15
(UConn: University of Connecticut)
This paper studies a distributed orthogonal frequency-division multiplexing (OFDM) system with multiple quasi-synchronous users, where different users may transmit different numbers of parallel data streams. The distinction from most existing work is that the multipath channels for different users have significantly different Doppler scales. Such a setting with two single-transmitter users was first studied in a recent publication by Tu et al. (2010). This paper presents two iterative receivers,...
Published on Apr 1, 2013in IEEE Communications Magazine10.36
Robert W. Heath93
Estimated H-index: 93
(University of Texas at Austin),
Steven W. Peters12
Estimated H-index: 12
+ 1 AuthorsJiayin Zhang1
Estimated H-index: 1
(Huawei)
Providing uniformly high capacity in cellular systems is challenging due to fading, path loss, and interference. A partial solution to this problem is the deployment of distributed antenna systems, where transmission points are distributed throughout the cell using coax cable or fiber, instead of being centrally located on a single tower. This article reviews how distributed antenna systems are evolving to provide higher performance on the downlink in cellular systems. Research trends in distrib...
Published on Mar 1, 2013in IEEE Transactions on Wireless Communications6.39
Zhaohui Wang15
Estimated H-index: 15
(UConn: University of Connecticut),
Shengli Zhou52
Estimated H-index: 52
(UConn: University of Connecticut)
+ 1 AuthorsPeter Willett47
Estimated H-index: 47
(UConn: University of Connecticut)
Recently significant progress has been made on point-to-point underwater acoustic communications, and the interest has grown on the application of those techniques in multiuser communication settings, where the asynchronous nature of multiuser communication poses a grand challenge. This paper develops a time-asynchronous multiuser reception approach for orthogonal frequency-division multiplexing (OFDM) transmissions in underwater acoustic channels. The received data burst is segmented and apport...
Published on Sep 1, 2010
Alison A. Proctor5
Estimated H-index: 5
(UVic: University of Victoria),
Jeff Kennedy3
Estimated H-index: 3
(UVic: University of Victoria)
+ 2 AuthorsDarryl Gamroth4
Estimated H-index: 4
The Ocean Technology Test Bed (OTTB) is a multi-functional underwater test facility developed by the Ocean Technology Lab (OTL) at the University of Victoria to serve military, academia, government and industry. The OTTB is located off the coast of Vancouver Island, Canada. It resides in 80m of water and covers 2-square kilometers of the seafloor. A seafloor cable provides power and communication to a recoverable platform. The platform sits inside of an Integrated cabled long baseline Acoustic S...
Published on Aug 1, 2008in IEEE Transactions on Information Theory3.21
Viveck R. Cadambe26
Estimated H-index: 26
,
Syed Ali Jafar62
Estimated H-index: 62
For the fully connected K user wireless interference channel where the channel coefficients are time-varying and are drawn from a continuous distribution, the sum capacity is characterized as C(SNR)=K/2log(SNR)+o(log(SNR)) . Thus, the K user time-varying interference channel almost surely has K/2 degrees of freedom. Achievability is based on the idea of interference alignment. Examples are also provided of fully connected K user interference channels with constant (not time-varying) coefficients...
Cited By3
Newest
Published on Jun 1, 2019in Acta Astronautica2.48
Quan Chen (National University of Defense Technology), Xiaoqian Chen2
Estimated H-index: 2
(Academy of Military Science)
+ 2 AuthorsXuefeng Tao
Abstract Recently several large-scale constellation networks have been proposed, requiring inter-satellite links and multiple gateways to be equipped. The gateway assignment and traffic congestion avoidance issues are of fundamental importance for the network. In this work, we establish the network model for mega-constellation network with multi-gateway by introducing the concept of satellite router and satellite gateway. We propose a distributed routing algorithm consisting of three processes: ...
Published on Apr 9, 2019in Applied Sciences
Hui Wang2
Estimated H-index: 2
,
Li Youming8
Estimated H-index: 8
+ 2 AuthorsZhiliang Li
The self-deployment of nodes with non-uniform coverage in underwater acoustic sensor networks (UASNs) is challenging because it is difficult to access the three-dimensional underwater environment. The problem is further complicated if network connectivity needs to be considered. In order to solve the optimization problem of sensor network node deployment, we propose a maximum coverage and connectivity self-deployment algorithm that is based on ant colony optimization (MCC-ACO). We carry out the ...