Transmit Beamforming for Spectral Coexistence of Satellite and Terrestrial Networks

Sharma, Shree Krishna; Chatzinotas, Symeon; Ottersten, Bjӧrn

doi:10.4108/icst.crowncom.2013.252017

Cited by 35 publications

(51 citation statements)

References 12 publications

(21 reference statements)

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“…However, in the context of CR networks, there exist only a few SNR estimation related works [36], [56]- [58]. Moreover, if the CR node has information on the DoA of the primary terminals either through database or through some DoA estimation algorithms, it can employ suitable beamforming based underlay approaches in order to mitigate interference towards/from the PRs/PTs [59], [60].…”

Section: Spectrum Sensing (Ss)mentioning

confidence: 99%

Cognitive Radio Techniques Under Practical Imperfections: A Survey

Sharma

Bogale

Chatzinotas

et al. 2015

IEEE Commun. Surv. Tutorials

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197

111

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Abstract-Cognitive Radio (CR) has been considered as a potential candidate for addressing the spectrum scarcity problem of future wireless networks. Since its conception, several researchers, academic institutions, industries, regulatory and standardization bodies have put their significant efforts towards the realization of CR technology. However, as this technology adapts its transmission based on the surrounding radio environment, several practical issues may need to be considered. In practice, several imperfections such as noise uncertainty, channel/interference uncertainty, transceiver hardware imperfections, signal uncertainty, synchronization issues, etc. may severely deteriorate the performance of a CR system. To this end, the investigation of realistic solutions towards combating various practical imperfections is very important for successful implementation of the cognitive technology. In this direction, first, this survey paper provides an overview of the enabling techniques for CR communications. Subsequently, it discusses the main imperfections that may occur in the most widely used CR paradigms and then reviews the existing approaches towards addressing these imperfections. Finally, it provides some interesting open research issues.

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Section: Spectrum Sensing (Ss)mentioning

confidence: 99%

Cognitive Radio Techniques Under Practical Imperfections: A Survey

Sharma

Bogale

Chatzinotas

et al. 2015

IEEE Commun. Surv. Tutorials

Self Cite

197

111

View full text Add to dashboard Cite

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“…The existing cognitive SatComs literature can be categorized into the following: (i) hybrid satellite-terrestrial coexistence scenario [32,54,56,58,59,76] and (ii) dual satellite coexistence scenario [55,57,60,67]. In this section, we present a dual coexistence scenario consisting of communicate with different gateways on the surface of the Earth.…”

Section: Multibeam-monobeam Satellite Coexistence In Frequency Domainmentioning

confidence: 99%

Cognitive Interference Alignment for Spectral Coexistence

Sharma

Chatzinotas

Ottersten

2014

Cognitive Radio and Networking for Heterogeneous Wireless Networks

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Interference Alignment (IA) has been widely recognized as a promising interference mitigation technique since it can achieve the optimal degrees of freedom in certain interference limited channels. In the context of Cognitive Radio (CR) networks, this technique allows the coexistence of two heterogeneous wireless systems in an underlay cognitive mode. The main concept behind this technique is the alignment of the interference on a signal subspace in such a way that it can be filtered out at the non-intended receiver by sacrificing some signal dimensions. This chapter starts with an overview of IA principle, Degree of Freedom (DoF) concept, and the classification of existing IA techniques. Furthermore, this chapter includes a discussion about IA applications in CR networks. Moreover, a generic system model is presented for allowing the coexistence of two heterogeneous networks using IA approach while relevant precoding and filtering processes are described. In addition, two important practical applications of the IA technique are presented along with the numerical results for underlay spectral coexistence of (i) femtocell-macrocell systems, and (ii) monobeam-multibeam satellite systems. More specifically, an uplink IA scheme is investigated in order to mitigate the interference of femtocell User Terminals (UTs) towards the macrocell Base Station (BS) in the spatial domain and the interference of multibeam satellite terminals towards the monobeam satellite in the frequency domain.

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“…A study on the separation distance between geostationary satellite communications (GSO) and terrestrial network in Ka band that guarantees a fixed interference to noise level (I/N) at the primary receiver is presented in [15]. A transmit beamforming technique at the BS to maximize the signal to interference plus noise ratio (SINR) towards the desired secondary user and to mitigate the interference towards the primary satellite terminals is proposed in [16].…”

Section: Introductionmentioning

confidence: 99%

A study on the coexistence of fixed satellite service and cellular networks in a mmWave scenario

Guidolin

Nekovee

Badia

et al. 2015

2015 IEEE International Conference on Communications (ICC)

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Abstract-The use of a larger bandwith in the millimeter wave (mmWave) spectrum is one of the key components of next generation cellular networks. Currently, part of this band is allocated on a co-primary basis to a number of other applications, such as the fixed satellite services (FSSs). In this paper, we investigate the coexistence between a cellular network and FSSs in a mmWave scenario. In light of the parameters recommended by the standard and the recent results presented in the literature on the mmWave channel model, we analyze different BSs deployments and different antenna configurations at the transmitters. Finally, we show how, exploiting the features of a mmWave scenario, the coexistence between cellular and satellite services is feasible and the interference at the FSS antenna can be kept below recommended levels.

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Transmit Beamforming for Spectral Coexistence of Satellite and Terrestrial Networks

Cited by 35 publications

References 12 publications

Cognitive Radio Techniques Under Practical Imperfections: A Survey

Cognitive Radio Techniques Under Practical Imperfections: A Survey

Cognitive Interference Alignment for Spectral Coexistence

A study on the coexistence of fixed satellite service and cellular networks in a mmWave scenario

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