Overview and comparison of on‐ground and on‐board beamforming techniques in mobile satellite service applications

Tronc, Jérome; Angeletti, Piero; Song, Nuan; Haardt, Martin; Arendt, J.; Gallinaro, G.

doi:10.1002/sat.1049

Cited by 34 publications

(25 citation statements)

References 22 publications

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“…These techniques relay severely on the quality of the CSI and they dramatically decrease their performance in case CSI is either deprecated or corrupted. On the contrary, multiuser detection techniques does not depend on the feedback channel but; however, the user terminal complexity 3 increases so as its cost. In addition, precoding system level studies are providing encouraging results for implementing this technique in real multibeam satellite systems [4].…”

Section: A Motivationmentioning

confidence: 99%

Generalized Multicast Multibeam Precoding for Satellite Communications

Joroughi

Vázquez

Pérez-Neira

2017

IEEE Trans. Wireless Commun.

152

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This paper deals with the problem of precoding in multibeam satellite systems. In contrast to general multiuser multiple-input-multiple-output (MIMO) cellular schemes, multibeam satellite architectures suffer from different challenges. First, satellite communications standards embed more than one user in each frame in order to increase the channel coding gain. This leads to the different so-called multigroup multicast model, whose optimization requires computationally complex operations. Second, when the data traffic is generated by several Earth stations (gateways), the precoding matrix must be distributively computed and attain additional payload restrictions. Third, since the feedback channel is adverse (large delay and quantization errors), the precoding must be able to deal with such uncertainties. In order to solve the aforementioned problems, we propose a two-stage precoding design in order to both limit the multibeam interference and to enhance the intra-beam minimum user signal power (i.e. the one that dictates the rate allocation per beam). A robust version of the proposed precoder based on a first perturbation model is presented. This mechanism behaves well when the channel state information is corrupted. Furthermore, we propose a per beam user grouping mechanism together with its robust version in order to increase the precoding gain. Finally, a method for dealing with the multiple gateway architecture is presented, which offers high throughputs with a low inter-gateway communication. The conceived designs are evaluated in a close-to-real beam pattern and the latest broadband communication standard for satellite communications.The research leading to these results has received funding from the Spanish Ministry of Science and Innovation under projects TEC2014-59225-C3-1-R (ELISA) and the Catalan Government (2014 SGR 1567).

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Section: A Motivationmentioning

confidence: 99%

Generalized Multicast Multibeam Precoding for Satellite Communications

Joroughi

Vázquez

Pérez-Neira

2017

IEEE Trans. Wireless Commun.

152

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“…As an example, Tronc et al [69] point out the implications of applying different phase variations to the signals being relayed, even when their transmission is error free. This feeder link communication is frequently considered to be transparent, although it has some limitations with important consequences for the global system performance.…”

Section: Limitations Of the Feeder Linkmentioning

confidence: 99%

Multibeam joint detection

Arnau

Lamare

Mosquera

2015

Cooperative and Cognitive Satellite Systems

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“…Reference [17] provides a summary of the models that can be used for the rain attenuation. The rain causes not only the attenuation but also the phase fluctuations because of the frequency dependence and the time-varying characteristics of the rain.…”

Section: Feeder-link Propagation Effectsmentioning

confidence: 99%