International Journal of Satellite Communications and Networking最新文献_第6页

CG-FlexBeamOpt: Advanced solution methodology for high throughput GEO satellite beam laydown and resource allocation CG-FlexBeamOpt：用于高吞吐量地球同步轨道卫星波束铺设和资源分配的先进解决方案方法学

IF 1.7 4区计算机科学

International Journal of Satellite Communications and Networking Pub Date : 2024-04-09 DOI: 10.1002/sat.1513

Ryan Li, Angus Gaudry, Vicky Mak-Hau

{"title":"CG-FlexBeamOpt: Advanced solution methodology for high throughput GEO satellite beam laydown and resource allocation","authors":"Ryan Li, Angus Gaudry, Vicky Mak-Hau","doi":"10.1002/sat.1513","DOIUrl":"10.1002/sat.1513","url":null,"abstract":"<p>Modern satellite communication systems are designed to serve dispersed users with changing operational requirements. Allocating resources to meet these requirements becomes highly complex when the size, location, and allocated frequency of satellite beams are flexible. We developed solution techniques that generate feasible beam patterns and frequency allocations to maximize the total demand met across all users. In our approach, an integer program selects an optimal set of beams from a heuristically generated pool of feasible candidate beams. The challenge is in how to efficiently build a pool of good quality candidate beams from exponentially many possible solutions. An innovative column generation-style heuristic to generate mathematically justifiable beams is presented to address this challenge. We also derived two other heuristic candidate beam generation algorithms to compare and contrast performance and robustness characteristics of different algorithmic choices. We tested the performance of our three new approaches on 12 operational instances that vary in user distribution, user numbers, and demand distribution. While the methods performed differently under varying operational scenarios, the column generation-based methods provided the best trade-off between computation time and solution quality in most cases. We further tested our two best performing algorithms for scalability. Our column generation-based methods were able to provide good quality solutions with up to 400 beams and 5,000 users. Our work provides valuable insights for real-life implementation: an end-user of our system can select the solution approach based on their business need, computational (time) budget, and the desired solution quality.</p>","PeriodicalId":50289,"journal":{"name":"International Journal of Satellite Communications and Networking","volume":"42 4","pages":"286-312"},"PeriodicalIF":1.7,"publicationDate":"2024-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/sat.1513","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140568882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A novel optimization method for attenuating multi-interferences in satellite communication earth station 衰减卫星通信地面站多重干扰的新型优化方法

IF 1.7 4区计算机科学

International Journal of Satellite Communications and Networking Pub Date : 2024-04-02 DOI: 10.1002/sat.1512

Kang Luo, Qing Wang, Kai Yang, Bin Li

引用次数: 0

Co-channel interference cancellation based on BSS for multi-satellite MIMO communication systems with FFR 基于 BSS 的多卫星 MIMO 通信系统共信道干扰消除与 FFR

IF 1.7 4区计算机科学

International Journal of Satellite Communications and Networking Pub Date : 2024-03-04 DOI: 10.1002/sat.1510

Yuan Qin, Hang Zhang, Wen Li, Hongpeng Zhu, Jiong Li

{"title":"Co-channel interference cancellation based on BSS for multi-satellite MIMO communication systems with FFR","authors":"Yuan Qin, Hang Zhang, Wen Li, Hongpeng Zhu, Jiong Li","doi":"10.1002/sat.1510","DOIUrl":"10.1002/sat.1510","url":null,"abstract":"<div>\u0000 \u0000 <p>Multiple-input multiple-output (MIMO) technology can boost the capacity of conventional satellite communications, and full frequency reuse (FFR) can further improve the capacity by making full use of frequency resources. However, FFR will cause severe co-channel interference and lead to a degradation of channel capacity. Blind source separation (BSS) algorithm can be used to eliminate co-channel interference and does not require prior information, which avoids the extra occupation of channel frequency resources. While the multi-satellite MIMO communication system have delay mixing characteristic, the separation performance will be degraded if the delay is ignored. In this paper, DMBSS algorithm for delay mixing is proposed. Firstly, the DMBSS algorithm utilizes Taylor expansion to achieve dimension expansion of observed signals and so as to transform the delay mixing into instantaneous mixing with extended dimension. Secondly, complex non-orthogonal joint diagonalization algorithm is used to solve the separation matrix equation of extended observation signals and extended source signals and thus to eliminate the co-channel interference. Simulation results show that for multi-satellite MIMO communication scenarios with FFR, the proposed algorithm can effectively improve the performance of co-channel interference cancellation and reduce the value of BER. Furthermore, the influence of order of Taylor expansion on the separation performance is also analyzed and simulated in this paper to show the cost performance of the proposed algorithm.</p>\u0000 </div>","PeriodicalId":50289,"journal":{"name":"International Journal of Satellite Communications and Networking","volume":"42 3","pages":"232-255"},"PeriodicalIF":1.7,"publicationDate":"2024-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140046574","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A novel method for satellite prediction of VDE-TER service traffic information based on multilayers bidirectional LSTM 基于多层双向 LSTM 的 VDE-TER 服务流量信息卫星预测新方法

IF 1.6 4区计算机科学

International Journal of Satellite Communications and Networking Pub Date : 2024-01-28 DOI: 10.1002/sat.1508

Ruiwen Wu, Zongwang Li, Zhuochen Xie, Xuwen Liang

{"title":"A novel method for satellite prediction of VDE-TER service traffic information based on multilayers bidirectional LSTM","authors":"Ruiwen Wu, Zongwang Li, Zhuochen Xie, Xuwen Liang","doi":"10.1002/sat.1508","DOIUrl":"10.1002/sat.1508","url":null,"abstract":"<div>\u0000 \u0000 <p>Satellite prediction of very high frequency (VHF) Data Exchange (VDE)-Terrestrial (VDE-TER) ship-to-ship Self-Organized Networks (SON) service traffic information is crucial for wireless resource allocation of VHF Data Exchange System (VDES). Due to the VDE-TER, channel load observed by the satellite changes rapidly and the historical information cached on the satellite is limited; the prediction of VDE-TER service traffic is difficult. This paper proposes a multilayer bidirectional long short-term memory (LSTM) neural network model (MLB-LSTM), which controls the amount of forgetting of historical information and the amount of memory of current information through the LSTM unit, so that the model can better learn the nonlinear changes of service traffic. The bidirectional LSTM module combines forward and backward time series data, reducing the amount of data required for prediction and enhancing the prediction accuracy of the model. Numerical results show that the proposed prediction model significantly outperforms traditional methods and is able to adapt to rapidly changing VDE-TER data.</p>\u0000 </div>","PeriodicalId":50289,"journal":{"name":"International Journal of Satellite Communications and Networking","volume":"43 6","pages":"447-458"},"PeriodicalIF":1.6,"publicationDate":"2024-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139588112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The evolution of lunar communication—From the beginning to the present 月球通信的演变——从开始到现在

IF 1.7 4区计算机科学

International Journal of Satellite Communications and Networking Pub Date : 2023-11-22 DOI: 10.1002/sat.1507

Andrea Farkasvölgyi, László Csurgai-Horváth, Petr Boháček

{"title":"The evolution of lunar communication—From the beginning to the present","authors":"Andrea Farkasvölgyi, László Csurgai-Horváth, Petr Boháček","doi":"10.1002/sat.1507","DOIUrl":"10.1002/sat.1507","url":null,"abstract":"<p>The Moon is the closest celestial body to the Earth. The examination and discovery of this planet have always played an important role in the history of humanity. Since the beginning of the space age, the Moon has been the target of many missions from the 1950s to the present day. Radio communication plays a fundamental role in space vehicle projects because this is the most obvious way to communicate with the ground station and transmit control commands and scientific data. From the early missions to the present day, Earth–Moon communication had many stages of development. In our article, we review this progress and then present the state-of-the-art ideas related to the present missions through the missions currently underway and those planned for the near future. Our primary objective is to describe the radio communication relay services planned for orbit around the Moon. Furthermore, we present the European Space Agency (ESA)-supported lunar missions, highlighting the Lunar Geology Orbiter (LUGO) mission. Finally, as a future perspective, we present the possibilities of optical communication in the Earth–Moon path, which can result a significant increase in capacity.</p>","PeriodicalId":50289,"journal":{"name":"International Journal of Satellite Communications and Networking","volume":"42 3","pages":"200-216"},"PeriodicalIF":1.7,"publicationDate":"2023-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/sat.1507","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138525246","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Twelve years of rain attenuation statistics of Earth–space propagation experiment at Ka band in Toulouse 图卢兹Ka波段地空传播试验12年雨衰减统计

IF 1.7 4区计算机科学

International Journal of Satellite Communications and Networking Pub Date : 2023-11-21 DOI: 10.1002/sat.1505

Étienne Suquet, Jean-Pascal Monvoisin, Laurent Castanet, Laurent Féral, Xavier Boulanger

引用次数: 0

Energy efficient power allocation for MIMO-NOMA-based integrated terrestrial-satellite networks 基于mimo - nomo的地面卫星综合网络的节能功率分配

IF 1.7 4区计算机科学

International Journal of Satellite Communications and Networking Pub Date : 2023-11-15 DOI: 10.1002/sat.1506

Xin Li, Yongjun Li, Xinkang Song, Long Shao, Hai Li

{"title":"Energy efficient power allocation for MIMO-NOMA-based integrated terrestrial-satellite networks","authors":"Xin Li, Yongjun Li, Xinkang Song, Long Shao, Hai Li","doi":"10.1002/sat.1506","DOIUrl":"10.1002/sat.1506","url":null,"abstract":"<div>\u0000 \u0000 <p>Millimeter-wave (mmWave) massive MIMO and non-orthogonal multiple access (NOMA) are promising ways for improving energy efficiency of integrated terrestrial-satellite networks. In this paper, we investigate the performance of integrated terrestrial-satellite networks, in which MIMO-NOMA-based terrestrial networks and satellite network cooperatively provide ubiquitous services for ground users while reusing the entire bandwidth. Both base stations (BSs) and satellite are equipped with multiple antennas, and beamforming technology is utilized to serve multiple users simultaneously. First, a user selection scheme based on channel gain ratio is proposed to select satellite users. Then, we design a user clustering algorithm for reducing the intra-beam and inter-beam interference of BSs users. Analog and digital beamforming techniques are also adopted to further increase beam gain and improve system energy efficiency. The terrestrial networks and satellite networks energy efficiency are separately optimized through beamforming design and power allocation scheme, and then, a joint iterative algorithm is proposed to maximize the system energy efficiency. In addition, we introduce the interference temperature threshold to limit the satellite interference to BSs users. Finally, the performance of the proposed algorithm is simulated in comparison with the existing algorithm. The results indicate that the presented algorithm has high superiority in system energy efficiency and it can be applied to integrated terrestrial-satellite networks.</p>\u0000 </div>","PeriodicalId":50289,"journal":{"name":"International Journal of Satellite Communications and Networking","volume":"42 3","pages":"181-199"},"PeriodicalIF":1.7,"publicationDate":"2023-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138525231","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Large constellations for fast acquisition and delivery of information: Design and analysis by stereographic projection onto the equatorial plane 用于快速获取和传递信息的大型星座：通过赤道面立体投影进行设计和分析

IF 1.7 4区计算机科学

International Journal of Satellite Communications and Networking Pub Date : 2023-11-03 DOI: 10.1002/sat.1504

Stefano Carletta, Mauro Pontani, Paolo Teofilatto

{"title":"Large constellations for fast acquisition and delivery of information: Design and analysis by stereographic projection onto the equatorial plane","authors":"Stefano Carletta, Mauro Pontani, Paolo Teofilatto","doi":"10.1002/sat.1504","DOIUrl":"10.1002/sat.1504","url":null,"abstract":"<p>Recent space projects are designed by satellite constellations with a large number of spacecraft, a global character (i.e., from equatorial to high inclination orbits), and the possibility to transfer information to different satellites of the constellation (inter satellite link) in order to deliver the information to the ground as soon as possible. To cope with a large number of parameters, a fast tool for constellation design, performance evaluation and networking strategies is needed. The aim of this paper is to obtain the performance of any constellation in less than 1 s, even when the number of satellites in the constellation and the duration of the analysis is large (e.g., more than 200 satellites in a period of some days). The proposed algorithm is based on analytical formulae obtained by using the stereographic projection on the equatorial plane of the satellite orbits and the projection of the target and ground station orbits. It is believed that the two-dimensional projection proposed here can offer some advantages with respect to the spatial analysis of satellite orbits and their ground tracks, such as the reduction in time required to calculate station/satellite and satellite/satellite encounter conditions, and the clear and simple representation of the motion of the satellite of the constellation and of the ground stations of interest.</p>","PeriodicalId":50289,"journal":{"name":"International Journal of Satellite Communications and Networking","volume":"42 2","pages":"134-164"},"PeriodicalIF":1.7,"publicationDate":"2023-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/sat.1504","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135819738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design of buffered double linked list for LEO satellite beam-hopping forwarding 为低地球轨道卫星波束跳转转发设计缓冲双链表

IF 1.7 4区计算机科学

International Journal of Satellite Communications and Networking Pub Date : 2023-09-27 DOI: 10.1002/sat.1503

Yangyang Wan, Wei Hong

引用次数: 0

A high-efficiency frequency synchronization scheme for low Earth orbit satellite communications based on dynamic game theory 基于动态博弈论的低地球轨道卫星通信高效频率同步方案

IF 1.7 4区计算机科学

International Journal of Satellite Communications and Networking Pub Date : 2023-09-25 DOI: 10.1002/sat.1502

Wen Liu, Wei Cai, Lizhe Liu, Dongdong Wang, Wenliang Lin, Ke Wang, Zhongliang Deng, Yaohua Deng, Da Wan, Zewen Dong, Junhe Hu

{"title":"A high-efficiency frequency synchronization scheme for low Earth orbit satellite communications based on dynamic game theory","authors":"Wen Liu, Wei Cai, Lizhe Liu, Dongdong Wang, Wenliang Lin, Ke Wang, Zhongliang Deng, Yaohua Deng, Da Wan, Zewen Dong, Junhe Hu","doi":"10.1002/sat.1502","DOIUrl":"10.1002/sat.1502","url":null,"abstract":"<div>\u0000 \u0000 <p>The rapid development of satellite internet networks has given rise to a new vision for the sixth generation of networking technology. However, the Doppler effect is relatively serious in satellite internet networks because a satellite moves quickly relative to a ground terminal. Therefore, there is an urgent need to study intelligent and dynamic synchronization methods to solve the problem of the rapidly changing Doppler frequency offset. Traditional methods do not consider the impact of spatial changes and typically focus on enhancing the estimation range or accuracy. We analyze various scenarios under phased array beam hopping and establish constraints between the terminal location, satellite ephemeris, subsatellite point track, elevation angle, and carrier frequency offset. We introduce dynamic game theory into frequency synchronization to optimize multiple Doppler estimation performance under rapidly changing channel conditions. We take the combination of carrier frequency offset estimation algorithm strategies at the current moment as the game entity. Simulation results demonstrate that the proposed method can achieve an estimation accuracy of 100 Hz and an estimation range of ±800 kHz. During the onboard test, the probability of achieving complete synchronization (when the synchronization success rate is 1) is 0.65, which is much higher than the 0.15 of the single method.</p>\u0000 </div>","PeriodicalId":50289,"journal":{"name":"International Journal of Satellite Communications and Networking","volume":"42 2","pages":"97-122"},"PeriodicalIF":1.7,"publicationDate":"2023-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135769881","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0