Wave propagation simulations for considering the installation of the maritime mobile satellite communication antennas

Aoyagi, Takaaki; Kouhei, Suzaki; Suzuki, Yôiti; Hirose, Takashi; Sugiyama, Takatoshi

doi:10.1109/apmc.2012.6421593

Cited by 4 publications

(4 citation statements)

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“…In [31], Chinese first mobile satellite communications system, Tiantong-1, as China's first mobile satellite communications system [31], can provide voice, short message, and low-speed data services, with a peak rate of 9.6 kbps. In [32], high throughput is achieved by satellite EchoStar-19. However, satellite-based communications are easily affected by climate and the marine environment, resulting in low reliability.…”

Section: Related Workmentioning

confidence: 99%

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Space-Air-Ground-Sea Integrated Networks: Modeling and Coverage Analysis

Kishk

Alouini

2023

IEEE Trans. Wireless Commun.

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Due to its potential to enable global connectivity in remote locations, such as rural areas and islands, Space-Air-Ground networks have become an ambitious solution for terrestrial communication in the sixth generation (6G) wireless communication network. In this paper, we propose a novel structure of Space-Air-Ground-Sea integrated networks (SAGSINs) to study and derive the coverage probability (CP) of users who are annotated as surface stations (SSs) on the far-reaching ocean surface that is far away from the coastline. By incorporating different types of relays such as onshore stations (OSs), tethered balloons (TBs), high altitude platforms (HAPs), and satellites (SATs), communication links between the terrestrial core connected base stations (CCBSs) and SSs are established via one of the four types of relay stations. Considering practical scenarios with a random distribution of SSs, we model the channel using the point-to-area model, which is recommended by ITU (for OSs to SS), the Rician model (for TBs or HAPs to SS), and the Shadowed-Rician model (for SATs to SS). When the SS's distance from the coastline continues to increase from zero, since different channel models are considered, different relay stations will result in specific received signal strengths at SSs. The most powerful relay station will be chosen as the relay at one time. Hence, as we move away from the coastline, the respective strengths of the different types of relay stations vary, and hence, the association preference (among HAPs, OSs, TBs, and SATs) of the SSs changes leading to a CP value high enough even at locations far away from the coastline into the ocean. We analyze the CP using tools from stochastic geometry. Comparisons of CP between the integrated system with four types of relay stations and the single relay station system (only one type of relay station available) are represented. Numerical results verified by Monte-Carlo simulations reveal insights into the applicability of SAGSINs.

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Section: Related Workmentioning

confidence: 99%

“…1) Channel between SSs and OSs: As recommended by ITU, for point-to-area communication with a frequency range from 30 MHz to 4000 MHz, the channel model is widely used for terrestrial and offshore wireless communication [6], [32] and is shown as follows.…”

Section: B Channel Modelsmentioning

confidence: 99%

Space-Air-Ground-Sea Integrated Networks: Modeling and Coverage Analysis

Kishk

Alouini

2023

IEEE Trans. Wireless Commun.

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“…Typical satellite tracking systems described above have fluctuation of only ±0.2 • in angle [13] [18]. According to our previous study, using such tracking systems cause very low level deviation by sea waves or winds compared to level variation by ship headings [9]. Fig.…”

Section: Introductionmentioning

confidence: 99%

“…Qualities of maritime communications are affected by various factors. Our research group has reported fluctuations of received levels in maritime satellite communications due to vibrations of the sea waves or by shadowing with a ship body [9][10] [11]. Satellite antennas on ships usually have an antenna isolation and tracking mechanism, which chases the aiming satellite against movements and vibrations of the ship caused by sea waves or winds [12] [13].…”

Section: Introductionmentioning

confidence: 99%

Modeling of interferences on other satellites in maritime satellite communications

Aoyagi

Suzaki

Suzuki

et al. 2013

2013 IEEE International RF and Microwave Conference (RFM)

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In maritime mobile satellite communications, mechanically controlled tracking systems are used to compensate changes of antenna orientation due to changes of a ship attitude caused by waves or winds of the sea. Orientations of antennas on a ship are limited so that transmitted electromagnetic waves are not affected by structures on the ship. Thus it is allowed to transmit waves when a clearance angle is greater than certain criteria. Our group has researched about fundamental relation between clearance angles and interferences for other satellites or other systems on the ship by numerical simulations for a simplified model. In this report, a realistic ship model is assumed for the simulations. As a result, a clearance angle, which interferences to the receiving satellite are small, has been found out under the conditions of the simulations. A simple model which describes interferences to received levels of the aiming and neighboring satellites is presented.

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Hierarchical Maritime Radio Networks for Internet of Maritime Things

2019

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Despite the potential benefits of a maritime Internet of Things, a number of issues hinder its realization, including the need for wide area coverage and cost-effectiveness. Toward these needs, a model is first presented for uplink maritime radio communications that hierarchically employ Wi-Fi and cellular links for data transmission from marine user equipments (MUEs) on a ship to a cellular base station with distributed antennas (DAs) along a coastline. Then, the performances are evaluated given in terms of average data rate and outage probability in the hierarchical maritime radio networks. When evaluating the performances, heterogeneous channel characteristics of the hierarchical networks are taken into account in which Rayleigh fading is considered for the MUE-ship links, whereas shadowed-Rician fading is considered for the ship-DA links. Moreover, the effects due to various transmission errors that can be occurred at different communication layers are reflected in determining the quality of service (QoS) requirements of a ship. With the help of authors' analysis, an antenna selection algorithm is proposed under which the minimum size of a service cloud can be found to support the QoS requirements of MUEs with a ship. The numerical evaluations demonstrate the validity of the proposed algorithm. INDEX TERMS Cellular networks, distributed antenna (DA), data minimization, Internet of maritime thing (IoMT), hierarchical networks, maritime communications, quality of service (QoS), wireless communication. YUJAE SONG (S'12-M'17) received the Ph.D. degree in electrical engineering from the Korea Advanced Institute of Science and Technology (KAIST), South Korea, in 2016. He was a Visiting Scholar in communication systems with the KTH Royal Institute of Technology, Sweden, in 2015. Since 2016, he has been a Senior Researcher with the Maritime ICT R&D Center, Korea Institute of Ocean Science and Technology. His research interests include design, analysis, and optimization of various wireless communication systems including 5G, maritime/underwater, and smart grid communications. SUNG HOON LIM (S'08-M'12) received the B.S. degree (Hons.

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Wave propagation simulations for considering the installation of the maritime mobile satellite communication antennas

Cited by 4 publications

References 1 publication

Space-Air-Ground-Sea Integrated Networks: Modeling and Coverage Analysis

Space-Air-Ground-Sea Integrated Networks: Modeling and Coverage Analysis

Modeling of interferences on other satellites in maritime satellite communications

Hierarchical Maritime Radio Networks for Internet of Maritime Things

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