Medium earth orbit optical satellite communication networks: Ground terminals selection optimization based on the cloud‐free line‐of‐sight statistics

2018 ◽  
Vol 37 (4) ◽  
pp. 370-384 ◽  
Author(s):  
Nikolaos K. Lyras ◽  
Christos N. Efrem ◽  
Charilaos I. Kourogiorgas ◽  
Athanasios D. Panagopoulos
Keyword(s):  
Communication Networks ◽  
Satellite Communication ◽  
Line Of Sight ◽  
Earth Orbit

Cloud Free Line of Sight Prediction Modeling for Optical Satellite Communication Networks

2017 ◽  
Vol 21 (7) ◽  
pp. 1537-1540 ◽  
Author(s):  
Nikolaos K. Lyras ◽  
Charilaos I. Kourogiorgas ◽  
Athanasios D. Panagopoulos
Keyword(s):  
Communication Networks ◽  
Satellite Communication ◽  
Line Of Sight ◽  
Prediction Modeling

Research and application of satellite communication networks as an alternative to modern communication systems

2021 ◽  
Vol 68 (07) ◽  
pp. 78-83
Author(s):  
Müslim Vahid oğlu Nasiyev ◽  
Keyword(s):  
Communication Networks ◽  
Communication Systems ◽  
Satellite Communication ◽  
Research Work ◽  
Earth Orbit ◽  
Television Programming ◽  
Telecommunication Services ◽  
Human Needs ◽  
Radio Signals ◽  
Satellite Dish

Research work has been devoted to show how satellite technology can meet a variety of human needs and the ultimate measure of its effectiveness. Communication satellites, whether in geostationary Earth orbit (GEO) or non GEO, provide an effective platform to relay radio signals between points on the ground. The users who employ these signals enjoy a broad spectrum of telecommunication services on the ground, at sea, and in the air. In recent years, such systems have become practical to the point where a typical household can have its own satellite dish. That dish can receive a broad range of television programming and provide broadband access to the Internet. Key words: satellite, antenna, Earth orbit (GEO), transponder, VHF, frequency modulation (FM)10.36719/2663-4619/68/78-83 Müslim Vahid oğlu Nasiyev Azərbaycan Texniki Universiteti magistrant [email protected] MÜASİR RABİTƏ SİSTEMLƏRİNƏ ALTERNATİV OLARAQ, PEYK RABİTƏ ŞƏBƏKƏLƏRİNİN ARAŞDIRILMASI VƏ TƏTBİQİ Açar sözlər: Peyk, antena, yer orbiti (GEO), transponder, VHF, tezlik modulyasiyası (FM) Research and application of satellite communication networks as an alternative to modern communication systems Summary Research work has been devoted to show how satellite technology can meet a variety of human needs and the ultimate measure of its effectiveness. Communication satellites, whether in geostationary Earth orbit (GEO) or non GEO, provide an effective platform to relay radio signals between points on the ground. The users who employ these signals enjoy a broad spectrum of telecommunication services on the ground, at sea, and in the air. In recent years, such systems have become practical to the point where a typical household can have its own satellite dish. That dish can receive a broad range of television programming and provide broadband access to the Internet. Key words: satellite, antenna, Earth orbit (GEO), transponder, VHF, frequency modulation (FM)

Performance of 4G-LTE Communication and Navigation System in Blended Wing-Body UAS

2019 ◽  
Vol 8 (4) ◽  
pp. 9538-9542
Keyword(s):  
Satellite Communication ◽  
Line Of Sight ◽  
Multiple Factors ◽  
The World ◽  
New Type ◽  
Blended Wing Body ◽  
4G Lte ◽  
The Right ◽  
And Control ◽  
Technology Demonstrator

In vision of searching for the right Unmanned Aerial System (UAS) for a specific mission, there are multiple factors to be considered by the operator such as mission, endurance, type of payload and range of the telemetry and control. This research is focusing on extending control range of the UAS by using 4G-LTE network to enable beyond-line-of-sight flying for the commercial UAS. Major UAS such Global Hawk, Predator MQ-1 are able to fly thousands of kilometers by the use of satellite communication. However, the satellite communication annual license subscription can be very expensive. With this situation in mind, a new type of flight controller with 4G-LTE communication has been developed and tested. Throughout the research, blended-wing-body (BWB) Baseline B2S is used as the platform for technology demonstrator. Result from this analysis has proven that the proposed system is capable to control a UAS from as far as United Kingdom, with a latency less than 881 ms in average. The new added capability can potentially give the commercial UAS community a new horizon to be able to control their UAS from anywhere around the world with the availability of 4G-LTE connection

scholarly journals Single-Satellite Integrated Navigation Algorithm Based on Broadband LEO Constellation Communication Links

2021 ◽  
Vol 13 (4) ◽  
pp. 703
Author(s):  
Lvyang Ye ◽  
Yikang Yang ◽  
Xiaolun Jing ◽  
Jiangang Ma ◽  
Lingyu Deng ◽  
...  
Keyword(s):  
Real Time ◽  
Satellite Communication ◽  
The State ◽  
Earth Orbit ◽  
Integrated Navigation ◽  
Location Services ◽  
The Real ◽  
Navigation Algorithm ◽  
Communication Links ◽  
Leo Satellite

With the rapid development of satellite technology and the need to satisfy the increasing demand for location-based services, in challenging environments such as indoors, forests, and canyons, there is an urgent need to improve the position accuracy in these environments. However, traditional algorithms obtain the position solution through time redundancy in exchange for spatial redundancy, and they require continuous observations that cannot satisfy the real-time location services. In addition, they must also consider the clock bias between the satellite and receiver. Therefore, in this paper, we provide a single-satellite integrated navigation algorithm based on the elimination of clock bias for broadband low earth orbit (LEO) satellite communication links. First, we derive the principle of LEO satellite communication link clock bias elimination; then, we give the principle and process of the algorithm. Next, we model and analyze the error of the system. Subsequently, based on the unscented Kalman filter (UKF), we model the state vector and observation vector of our algorithm and give the state and observation equations. Finally, for different scenarios, we conduct qualitative and quantitative analysis through simulations, and the results show that, whether in an altimeter scenario or non-altimeter scenario, the performance indicators of our algorithm are significantly better than the inertial navigation system (INS), which can effectively overcome the divergence problem of INS; compared with the medium earth orbit (MEO) constellation, the navigation trajectory under the LEO constellation is closer to the real trajectory of the aircraft; and compared with the traditional algorithm, the accuracy of each item is improved by more than 95%. These results show that our algorithm not only significantly improves the position error, but also effectively suppresses the divergence of INS. The algorithm is more robust and can satisfy the requirements of cm-level real-time location services in challenging environments.

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