Advanced Multibeam Antenna Configurations Based on Reflectarrays: Providing multispot coverage with a smaller number of apertures for satellite communications in the K and Ka bands

Martinez‐de‐Rioja, Eduardo; Martinez‐de‐Rioja, Daniel; Encinar, José A.; Pino, Antonio; González-Valdés, Borja; Rodríguez-Vaqueiro, Yolanda; Arias, Marcos; Toso, Giovanni

doi:10.1109/map.2019.2932311

Cited by 23 publications

(16 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, the CubeSat's high-speed movement while scanning the Earth needs effective equipment to achieve the desired altitude control [5]. In other words, an effective ADCS subsystem should alleviate the angular variations to avoid all the unexpected space disturbances [6]. The stable movement of satellites, which are orbiting based on a particular orientation scenario, allows for easier and accurate determination of the received solar irradiance to the satellite's sides.…”

Section: Related Workmentioning

confidence: 99%

Power Budgeting of LEO Satellites: An Electrical Power System Design for 5G Missions

et al. 2021

View full text Add to dashboard Cite

Although Geostationary-Equatorial-Orbit (GEO) satellites have achieved significant success in conducting space missions, they cannot meet the 5G latency requirements due to the far distance from the earth surface. Therefore, Low-Earth-Orbit (LEO) satellites arise as a potential solution for the latency problem. Nevertheless, integrating the 5G terrestrial networks with LEO satellites puts an increased burden on the satellites' limited budget, which stems from their miniature sizes, restricted weights, and the small available surface for solar harvesting in the presence of additional required equipment. This paper aims to design the Electrical Power System (EPS) for 5G LEO satellites and investigate altitudes that meet the latency and capacity requirements of 5G applications. In this regard, accurate solar irradiance determination for the nadir-orientation scenario, Multi-Junction (MJ) solar cells modeling, backup batteries type and number, and designing highly-efficient converters are addressed. Accordingly, the power budgeting of the 5G LEO satellite can be achieved based on defining the maximum generated power and determining the satellite's subsystem power requirements for 5G missions. In the sequel, the measured and simulated values of the electrical V-I characteristics of an MJ solar panel are compared to validate the model by using a Clyde Space solar panel that reaches a maximum power generation of approximately 1W at (I M P P = 0.426A, V M P P = 2.35V ). Moreover, a synchronous boost converter circuit is designed based on commercial offthe-shelf elements.INDEX TERMS 5G, CubeSat, Electrical Power System (EPS), Low-Earth-Orbit (LEO) Satellites, Multi-Junction (MJ) Solar Cells.

show abstract

Section: Related Workmentioning

confidence: 99%

Power Budgeting of LEO Satellites: An Electrical Power System Design for 5G Missions

et al. 2021

View full text Add to dashboard Cite

show abstract

“…In addition to the advantages of satellite communication, HTS systems have low communication cost and high throughput, which compensate the deficiencies of traditional satellite systems. Thanks to the rapid development of antenna technology [1][2][3][4][5][6], a large number of high-gain beams can be created and a high order of frequency reuse can be employed in the service area of the system to achieve this large throughput [7]. A four-color frequency reuse scheme is adopted in current HTS systems to avoid co-frequency interference between adjacent beams as well as obtaining a fairly high frequency reuse factor [8].…”

Section: Introductionmentioning

confidence: 99%

User scheduling for multicast transmission in high throughput satellite systems

Zhang

Jia

Wei

et al. 2020

J Wireless Com Network

View full text Add to dashboard Cite

Adopting full frequency reuse in high throughput satellite (HTS) systems is expected to cope with huge communication demands and large user populations. Moreover, a kind of multicast transmission, which embeds the data of several users in each frame, can be employed to increase the efficiency of HTS systems. Multicast precoding is usually utilized in such systems to mitigate the co-frequency interference between beams and improve the efficiency of transmission. In this context, considering that the number of users may exceed the number of available communication resources in the system, we investigate user scheduling for the multicast transmission in HTS systems with full frequency reuse and multicast precoding. We perform user scheduling according to the user channel state information and decouple the scheduling problem into two phases: intra-beam and inter-beam scheduling. Intra-beam scheduling determines the users involved in the transmission of each frame with the purpose of reducing the influence of the multicast fashion. For intra-beam scheduling, we put forth a fixed-size user grouping algorithm. In contrast to previous studies, this algorithm takes the interference among beams into consideration during the scheduling. In inter-beam scheduling, user groups belonging to different beams are scheduled to improve the performance of the multiplexed transmission. An inter-beam scheduling algorithm is proposed to improve the fairness among users. The simulation results verify the superiority of the proposed algorithms in terms of fairness and spectral efficiency.

show abstract

“…1 The superiority of HTS systems lies in the multibeam architecture. 2 Hundreds of high-gain spot beams are created by the multibeam antenna, and frequency reuse is deployed among these beams.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, high‐throughput satellite (HTS) systems have drawn considerable attention on account of their high‐quality worldwide broadband services and low communication cost by comparison with traditional satellite systems 1 . The superiority of HTS systems lies in the multibeam architecture 2 . Hundreds of high‐gain spot beams are created by the multibeam antenna, and frequency reuse is deployed among these beams.…”

Section: Introductionmentioning

confidence: 99%

Subgrouping‐based multicast transmission over high‐throughput satellite systems with beam cooperation

Zhang

Yang

Wei

et al. 2020

Satell Commun Network

View full text Add to dashboard Cite

This paper investigates the multicast transmission for multicast services in high-throughput satellite (HTS) systems. Considering the multibeam multicast feature of HTSs, cooperative transmission among beams is involved in to improve the efficiency of the multicast transmission. Since the multicast transmission rate depends on the worst user channel state, all the users experience an unreasonably low rate. In this situation, subgrouping techniques are employed to increase transmission rates of users. A subgrouping-based multicast transmission problem aiming at maximizing the lowest transmission rate of the users is studied to guarantee fairness among users. We formulate the problem as a max-min optimization problem and propose two low-complex subgrouping algorithms for this problem. Additionally, we also consider multicasting in a single beam and devise a two-layer transmission scheme for it. In the performance evaluation part, besides the impact of parameters on subgrouping performance, we analyze the performance and the computational complexity of the proposed algorithms. The results indicate that the two subgrouping algorithms can achieve favorable performance with low complexity.

show abstract

Advanced Multibeam Antenna Configurations Based on Reflectarrays: Providing multispot coverage with a smaller number of apertures for satellite communications in the K and Ka bands

Cited by 23 publications

References 33 publications

Power Budgeting of LEO Satellites: An Electrical Power System Design for 5G Missions

Power Budgeting of LEO Satellites: An Electrical Power System Design for 5G Missions

User scheduling for multicast transmission in high throughput satellite systems

Subgrouping‐based multicast transmission over high‐throughput satellite systems with beam cooperation

Contact Info

Product

Resources

About