VHTS systems: Requirements and evolution

Fenech, Hector; Amos, S.; Hirsch, Antonin; Soumpholphakdy, V.

doi:10.23919/eucap.2017.7928175

Cited by 15 publications

(14 citation statements)

References 3 publications

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“…Traffic demand is increasing significantly in satellite communication systems. Very High Throughput Satellites (VHTS) are usually geostationary satellite systems that will be able to meet traffic demand in the upcoming years [1][2][3]. In this sense, VHTS systems exceed the capacity of traditional FSS and MSS systems (Fixed and Mobile Satellite Services, respectively) with contoured regional footprints and aspire to achieve 1 Terabit/s per satellite in the near future [4].…”

Section: Introductionmentioning

confidence: 99%

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Forward Link Optimization for the Design of VHTS Satellite Networks

et al. 2020

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The concept of geostationary VHTS (Very High Throughput Satellites) is based on multibeam coverage with intensive frequency and polarization reuse, in addition to the use of larger bandwidths in the feeder links, in order to provide high capacity satellite links at a reduced cost per Gbps in orbit. The dimensioning and design of satellite networks based on VHTS imposes the analysis of multiple trade-offs to achieve an optimal solution in terms of cost, capacity, and the figure of merit of the user terminal. In this paper, we propose a new method for sizing VHTS satellite networks based on an analytical expression of the forward link CINR (Carrier-to-Interference-plus-Noise Ratio) that is used to evaluate the trade-off of different combinations of system parameters. The proposed method considers both technical and commercial requirements as inputs, including the constraints to achieve the optimum solution in terms of the user G/T, the number of beams, and the system cost. The cost model includes both satellite and ground segments. Exemplary results are presented with feeder links using Q/V bands, DVB-S2X and transmission methods based on CCM and VCM (Constant and Variable Coding and Modulation, respectively) in two scenarios with different service areas.

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Section: Introductionmentioning

confidence: 99%

“…shows the distribution of ModCods in the service area with VCM for scenario 1. Five different ModCods were used: 64APSK 32/45-L, 16APSK 7/9, 16APSK 3/5, 16APSK1 2 -L, and QPSK 11/20. It can be seen that the ModCod assignment in the service area varies according to the link condition of each site.Electronics 2020, 9, 473 14 of 21…”

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confidence: 99%

Forward Link Optimization for the Design of VHTS Satellite Networks

et al. 2020

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“…An issue with isoflux coverage is the beam lattice which is not regular, such as seen in traditional GEO hexagonal four-color schemes. 12 A graph coloring algorithm based on DSATUR algorithm 13 was implemented to allocate the frequency bands to each beam. This algorithm is efficient to provide frequency layouts avoiding the reuse of frequency bands between two neighbor beams that would generate interference.…”

Section: Multiple Fixed Beam Coverage With Bent-pipe Transpondersmentioning

confidence: 99%

“…SFPB implies that each beam is amplified by a single high power amplifier (HPA) and requires constraints on amplification that are described further in Section 5.3. An issue with isoflux coverage is the beam lattice which is not regular, such as seen in traditional GEO hexagonal four‐color schemes 12 . A graph coloring algorithm based on DSATUR algorithm 13 was implemented to allocate the frequency bands to each beam.…”

Section: Assessed Payloadsmentioning

confidence: 99%

A methodology to benchmark flexible payload architectures in a megaconstellation use case

Vidal

Legay

Goussetis

et al. 2020

Satell Commun Network

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This paper proposes a methodology to benchmark satellite payload architectures and find the optimal trade-offs between high flexibility and low complexity. High flexibility would enable the satellite to adapt to various distributions of user terminals on the ground and fulfill the data rate demand of these users. Besides, low complexity is required to keep satellite networks competitive in the context of emerging 5G networks. To estimate the flexibility of a payload, an indicator to characterize the non-uniformity of user distributions is proposed. Each benchmarked payload may be characterized by a graph relating the throughput to this parameter further denoted. The payload provides the same throughput trends for different scenarios of user distributions with the same parameter. As a consequence, the average capacity of the system may be estimated by (a) calculating the probability distribution of over the orbit and (b) integrating the throughput based on this payload response. It thus results in a straightforward way for benchmarking payloads directly on an estimation of the averaged capacity, accounting for the user distribution over the earth. A simulation platform has been developed to characterize the payload throughput including the implementation of a resource allocation algorithm that accounts for constraints of various payloads. Using this definition and the developed tool, we benchmark a bent-pipe architecture, a beam hopping architecture and a hybrid beam-steering architecture for a LEO megaconstellation use case. The methodology showcases the interest for investigating different payload architectures depending on realistic traffic scenario analysis.

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“…Traffic demand is increasing significantly in satellite communication systems. Very High Throughput Satellites (VHTS) are usually geostationary satellite systems that will be able to meet traffic demand in the upcoming years [1,2]. In this sense, VHTS systems exceed the capacity of traditional FSS and MSS systems (Fixed and Mobile Satellite Services, respectively) with contoured regional footprints and aspire to achieve 1 Terabit/s per satellite in the near future [3].…”

Section: Introductionmentioning

confidence: 99%

Forward Link Optimization for the Design of VHTS Satellite Networks

Ortíz¹,

Martínez²,

Natera³

et al. 2020

Preprint

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The concept of geostationary VHTS (Very High Throughput Satellites) is based on multibeam coverage with intensive frequency and polarization reuse in addition to the use of larger bandwidths in the feeder links, in order to provide high capacity satellite links at a reduced cost per Gbps in orbit. The dimensioning and design of satellite networks based on VHTS imposes the analysis of multiple trade-offs to achieve an optimal solution in terms of cost, capacity and figure of merit of the user terminal. In this paper, we propose a new method for sizing VHTS satellite networks based on an analytical expression of the forward link CINR (Carrier-to-Interference-plus-Noise Ratio) that is used to evaluate the trade-off of different combinations of system parameters. The proposed method considers both technical and commercial requirements as inputs including the constraints to achieve the optimum solution in terms of the user G/T, the number of beams and the system cost. The cost model includes both satellite and ground segments. Exemplary results are presented with feeder links using Q/V bands, DVB-S2X and transmission methods based on CCM and VCM (Constant and Variable Coding and Modulation, respectively) in two scenarios with different service areas.

show abstract

VHTS systems: Requirements and evolution

Cited by 15 publications

References 3 publications

Forward Link Optimization for the Design of VHTS Satellite Networks

Forward Link Optimization for the Design of VHTS Satellite Networks

A methodology to benchmark flexible payload architectures in a megaconstellation use case

Forward Link Optimization for the Design of VHTS Satellite Networks

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