Ku-band SATCOM On-the Move Network

Wilcoxson, Don; Sleight, Brian; Buchman, D.; Vandermeulen, Ric

doi:10.1109/milcom.2005.1605691

Cited by 12 publications

(3 citation statements)

References 5 publications

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“…As spot beam coverage zones are moving with the satellites, seamless network connection of a user is provided via a hand over process from one spot beam to another. In [64], [65], similar ideas can be found. Gateways (Earth stations) are crucial for connecting the satellites to the core network.…”

Section: System Modelmentioning

confidence: 54%

Low-Complexity Algorithm for Radio Astronomy Observation Data Transport in an Integrated NGSO Satellite Communication and Radio Astronomy System

Mohamed

Minn

2021

IEEE Open J. Commun. Soc.

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An integrated non-geostationary orbit (NGSO) satellite communication and radio astronomy system (SCRAS), was recently proposed in [1] as a new coexistence paradigm. In SCRAS, the transportation of the radio astronomical observation (RAO) data from the space to the ground stations is an important problem, for which [1] proposed a linear programming optimization based algorithm. However, the computational complexity of this algorithm is quite high which is exacerbated by the need to re-compute the algorithm frequently due to the time-varying characteristics of the observing satellites, the Earth stations, and the RAO region. In this paper, to address this high complexity issue, we develop a low-complexity RAO data transport algorithm. In addition to the static resource constraint scenario considered in the existing work, we introduce a dynamic resource constraint scenario to exploit the knowledge of the satellite communication system (SCS) traffic statistics. We also present a modified version of the algorithm in [1] for the dynamic resource constraint scenario. In addition to the number of inter-satellite link (ISL) hops as the RAO data transport cost metric, we also evaluate the metric of the sum of the squared ISL hop distances which reflects the transmission energy cost. Furthermore, computational complexity analysis and data transport costs of the algorithms are presented. Our results show that the proposed algorithm yields several orders of computational complexity saving over the existing method while incurring a modest increase in the data transport cost. Our proposed dynamic resource constraint scenario provides plausible reduction of the RAO data transport cost.

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Section: System Modelmentioning

confidence: 54%

Low-Complexity Algorithm for Radio Astronomy Observation Data Transport in an Integrated NGSO Satellite Communication and Radio Astronomy System

Mohamed

Minn

2021

IEEE Open J. Commun. Soc.

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“…However, classical RA schemes have been widely investigated in the literature and are known not to perform well in the satellite environment . There are only few examples of satellite mobile systems based on a RA protocol such as Spread Spectrum Aloha (SSA) in case of Omnitracs and the Viasat Arc Light system . Both systems typically operate at Ku‐band where their low spectral efficiency is compensated by the possible exploitation of Ku‐band inclined end‐of‐life satellites with reduced transponder cost.…”

Section: Introductionmentioning

confidence: 99%

Enhanced spread Aloha physical layer design and performance

Gaudenzi

Herrero

Gallinaro

2014

Satell Commun Network

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SUMMARYThis paper describes the key design and performance aspects of the Enhanced Spread Spectrum Aloha (E‐SSA) physical layer, which represents an essential component of the S‐band Mobile Interactive Multimedia European Telecommunication Institute standard. Thanks to advanced signal processing at the gateway side, the E‐SSA random access protocol allows to achieve unprecedented spectral efficiency in a pure asynchronous random access mode with high robustness against received packets power unbalance. The E‐SSA physical layer is closely derived from the Third Generation Partnership Wideband Code Division Multiple Access random access channel physical layer with some adaptation to best operate in the Land Mobile Satellite channels. Particular emphasis is devoted to the E‐SSA physical layer system design drivers as well to the packet transmission control policies, which are of high relevance for S‐band Mobile Interactive Multimedia. The demodulator architectural design is also illustrated jointly with some of the key detection performance. Finally, the E‐SSA random access protocol performance are reported for Additive White Gaussian Noise and satellite mobile channels. Copyright © 2014 John Wiley & Sons, Ltd.

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“…Antenna size varies significantly across the different types of mobile platforms due to the physical constraints of those platforms. For example, in a typical ArcLight® Ku-band network [1] [2] , the smallest antennas tend to be 0.3 meter reflectors mounted on business jets and the largest are typically 1 meter reflectors onboard relatively large vessels at sea. Ground-vehicles and smaller vessels tend to use antennas in the 0.45 meter to 0.6 meter range.…”

Section: Introductionmentioning

confidence: 99%

Increased dynamic range multi-rate waveform for mobile satellite communications: Adaptive Coding Spreading and Modulation (ACSM)

O’Neill

Loh

Velayudhan

et al. 2010

2010 - Milcom 2010 Military Communications Conference

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For time-division multiplexed satellite communications links, a multi-rate waveform can enable substantial capacity gains over waveforms employing static coding and modulation. Using a multi-rate waveform such as DVB-S2 with adaptive coding and modulation (ACM), a user's data is transported with the most efficient modulation and forward error correction coding point that specific user can reliably receive.Many mobile satellite communication applications require a substantially smaller aperture or a lowerprofile antenna as compared to typical fixed-site very small aperture terminals (VSATs) for which DVB-S2 was designed. Over a wide area of operation, these smaller mobile terminals often cannot establish a link that observes regulatory powerspectral density limits using even the most robust modulation and code point that the DVB-S2 waveform offers.By adding the concept of adaptive direct sequence spreading to the adaptive coding and modulation, a more capable multi-rate waveform emerges that addresses a comprehensive set of mobile terminal platform types and scenarios. In this paper, the Adaptive Coding Spreading and Modulation (ACSM) concept is described and the capacity gains are quantified for several case studies. Also, a blockage mitigation technique employed within the ACSM concept that enables communications on train or helicopter mounted platforms is discussed.

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Ku-band SATCOM On-the Move Network

Cited by 12 publications

References 5 publications

Low-Complexity Algorithm for Radio Astronomy Observation Data Transport in an Integrated NGSO Satellite Communication and Radio Astronomy System

Low-Complexity Algorithm for Radio Astronomy Observation Data Transport in an Integrated NGSO Satellite Communication and Radio Astronomy System

Enhanced spread Aloha physical layer design and performance

Increased dynamic range multi-rate waveform for mobile satellite communications: Adaptive Coding Spreading and Modulation (ACSM)

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