Self interference in non geostationary satellite systems

Blondeau, S.; Maral, G.; Roussel, Tom; Taisant, J.P.

doi:10.1049/cp:19950041

Cited by 4 publications

(2 citation statements)

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“…Consequently, the effect of the separation angle between GEO and NGEO and the combined effect of the number of interfering satellites and separation angle have been considered in order to analyze the effect of interference generated by an NGEO link to the GEO link. Furthermore, the contribution in presents the theoretical expressions for calculating the C/I ratio both for the uplink and the downlink in NGEO satellite systems.…”

Section: Frequency Sharing Studies Between Geo and Ngeo Systemsmentioning

confidence: 99%

In‐line interference mitigation techniques for spectral coexistence of GEO and NGEO satellites

Sharma

Chatzinotas

Ottersten

2014

Satell Commun Network

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Summary The interest towards the deployment of Low Earth Orbit (LEO)/Medium Earth Orbit (MEO) satellite systems in several frequency bands is increasing due to the requirement of low latency for real‐time systems and high demand of broadband data. When the number of usable Non‐Geostationary (NGEO) satellites, that is, LEO/MEO in space, increases, the frequency coexistence between the NGEO satellite systems with the already existing geostationary (GEO) satellite networks becomes a requisite. In this context, it is crucial to explore interference mitigation techniques between GEO and NGEO systems in order to allow their spectral coexistence. More specifically, in the coexistence scenario of GEO and NGEO satellite networks, in‐line interference may be a serious problem, especially in the equatorial region. In this paper, we provide several frequency sharing studies in the context of the coexistence of an NGEO satellite link with another NGEO/GEO satellite link. Furthermore, we carry out interference analysis between GEO and MEO satellite systems considering the case of the O3b satellite system and propose an adaptive power control technique for both the uplink and downlink scenarios in order to mitigate the in‐line interference. Moreover, we suggest several cognitive solutions for mitigating the in‐line interference and provide future research issues. Copyright © 2014 John Wiley & Sons, Ltd.

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Section: Frequency Sharing Studies Between Geo and Ngeo Systemsmentioning

confidence: 99%

In‐line interference mitigation techniques for spectral coexistence of GEO and NGEO satellites

Sharma

Chatzinotas

Ottersten

2014

Satell Commun Network

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“…taking into account several parameters: orthogonality among signals, the activity factor, polarization isolation, channel impairments, actual angular distribution of all the users, etc. The models shown in References [2,[11][12][13][14] have been redefined. In particular, the subset of interfering users has been identified and detailed for both CDMA and FDMA for up link and down link.…”

Section: Interference Modelmentioning

confidence: 99%

Interference evaluations and simulations for multisatellite multibeam systems

Loreti

Luglio

2002

Int. J. Satell. Commun.

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SUMMARYThird generation communication systems will be characterized by full integration between terrestrial and satellite components. To this aim, global coverage along with not severe requirements for user terminals are mandatory for the satellite segment and the use of constellations of satellites in low or medium Earth orbits (LEO or MEO) seems to be a viable solution. Those satellite systems will adopt multibeam antennas to achieve high spectral efficiency and low-cost terminals. Thus, interference becomes one of the most limiting factors in terms of both link availability and capacity.The paper presents a more complete interference model than previously published in literature. The identification of the interfering users set has been introduced and all the factors impacting interference generation or isolation have been considered in case of both FDMA and CDMA access. This model is suitable for instantaneous analysis of multisatellite constellations. It has been implemented and timedomain simulations have been performed to evaluate the impairments due to co-channel interference for different access techniques for LEO configuration.Simulation results on interference and users spatial distribution, on trade-offs between interference and system capacity will be presented. Finally, the main interference mitigation techniques will be listed and discussed.

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Effect on total system capacity due to imperfect power control for band sharing between CDMA based non-geostationary satellite-PCNs

Aziz

Tafazolli²,

Evans³

Proceedings of PIMRC '96 - 7th International Symposium on Personal, Indoor, and Mobile Communications

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Self interference in non geostationary satellite systems

Cited by 4 publications

References 0 publications

In‐line interference mitigation techniques for spectral coexistence of GEO and NGEO satellites

In‐line interference mitigation techniques for spectral coexistence of GEO and NGEO satellites

Interference evaluations and simulations for multisatellite multibeam systems

Effect on total system capacity due to imperfect power control for band sharing between CDMA based non-geostationary satellite-PCNs

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