Doppler characterization for LEO satellites

Ali, Irfan N.; Al-Dhahir, Naofal; Hershey, John E.

doi:10.1109/26.662636

Cited by 242 publications

(106 citation statements)

References 4 publications

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“…As discussed in [5] the angular velocity of the satellite in the Earth-Centered Fixed (ECF) frame shows small variation for most circular orbits and, hence, can be approximated by a constant:…”

Section: Single Satellite Geometrymentioning

confidence: 99%

A Trace-Time Framework for Prediction of Elevation Angle Over Land Mobile LEO Satellites Networks

Seyedi

Rahimi

2010

Wireless Pers Commun

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Elevation angle is one of the most significant parameters of land mobile satellite channels, subject to rapid variations in the case of Low Earth Orbit (LEO) satellite systems. In this paper a novel trace-based framework is proposed and analyzed which is capable of predicting elevation angle as a function of time during satellite visibility window. Tracetime based modeling makes the framework practical for real-time evaluation of elevation angle and its alteration incurred by communication links in LEO satellite systems. The proposed method is particularly suitable for development of communication channel models and services in mobile LEO satellite networks where path variability is of great importance.

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Section: Single Satellite Geometrymentioning

confidence: 99%

A Trace-Time Framework for Prediction of Elevation Angle Over Land Mobile LEO Satellites Networks

Seyedi

Rahimi

2010

Wireless Pers Commun

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“…A more appealing solution is based on the Doppler effect. The application of Doppler-based techniques proved to be an efficient and low-complexity method for the estimation of the location of a user terminal and the prediction of the time instant of the handover occurrence [16,17,35,36]. Doppler-based techniques necessitate satellites with on-board processing capabilities.…”

Section: Non-persevering Bandwidth Allocationmentioning

confidence: 99%

QoS handover management for multimedia LEO satellite networks

Karapantazis

Pavlidou

2006

Telecommun Syst

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Low earth orbit (LEO) satellite systems gained considerable interest towards the end of the previous decade by virtue of some of the appealing features that are endowed with, such as low propagation delay and the ability to communicate with handheld terminals. However, after the limited commercial success of the first networks of this kind, future satellite networks are now conceived as complementary rather than competitive to terrestrial networks. In this paper, we focus on one of the most influential factors in system performance, that is, the handover of a call. First, we provide a succinct review of the handover strategies that have been proposed in the literature. Then we propose two different satellite handover techniques for broadband LEO satellite systems that capitalize upon the satellite diversity that a system may provide. The proposed schemes cater for multimedia traffic and are based on the queuing of handover requests. Moreover, a deallocation scheme is also proposed according to which capacity reservation requests are countermanded when the capacity that they strive to reserve is unlikely to be used. Simulation studies further document and confirm the positive characteristics of the proposed handover schemes.

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“…In the first one the serving satellite is able to derive the elevation angle of the communication at any time based on a single measurement of Doppler shift. This method has been used in literature ( [11]) for other purposes. The second involves the calculation of the azimuth angle between the satellite direction and the MS by measuring Doppler shift at two different time instances.…”

Section: B Position Monitoringmentioning

confidence: 99%

Analytic study of doppler-based handover management in LEO satellite systems

Papapetrou

Pavlidou

2005

IEEE Trans. Aerosp. Electron. Syst.

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Abstract-The problem of dynamic handover management in Low Earth Orbit (LEO) satellite systems is addressed in this paper. Particularly, an analytical study of a newly proposed method for handover management, called Dynamic Doppler-based Handover Prioritization scheme (DDBHP), will be presented. DDBHP utilizes Doppler shift monitoring of each communicating user terminal onboard the satellite and geometric characteristics to accurately predict the handover load. As a result, handover requests are more effectively managed, resulting to an improved performance in terms of blocking and forced termination probabilities. Moreover, by supporting guaranteed handovers, DDBHP can be used to provide QoS to users of future broadband satellite networks. An extensive mathematical model that justifies Doppler shift monitoring will be presented along with a detailed queueing model used not only to evaluate DDBHP performance but also to provide a methodology for associating DDBHP operational parameters with desired performance. Comparison of analytical and simulation results validate the proposed model.

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Doppler characterization for LEO satellites

Cited by 242 publications

References 4 publications

A Trace-Time Framework for Prediction of Elevation Angle Over Land Mobile LEO Satellites Networks

A Trace-Time Framework for Prediction of Elevation Angle Over Land Mobile LEO Satellites Networks

QoS handover management for multimedia LEO satellite networks

Analytic study of doppler-based handover management in LEO satellite systems

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