DVB‐S2X‐enabled precoding for high throughput satellite systems

Arapoglou, Pantelis-Daniel; Ginesi, Alberto; Cioni, Stefano; Erl, Stefan; Clazzer, Federico; Andrenacci, Stefano; Vanelli‐Coralli, Alessandro

doi:10.1002/sat.1122

Cited by 67 publications

(70 citation statements)

References 18 publications

(22 reference statements)

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“…This is shown in Figure 4. Similar to the study in [4] It results that in all cases, user grouping increases the throughput. Specifically, for Q = 3, the user grouping gain becomes larger than in the Q = 2 case.…”

Section: A User Groupingsupporting

confidence: 80%

“…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]. As a result, we will consider precoding as interference reliever for the present study.…”

Section: A Motivationmentioning

confidence: 98%

“…This will be discussed in Section II. 4 spectrum to access all the feeds, each gateway has only access to a certain set of feeds. In [12], [13] a precoding scheme based on the regularized ZF scheme is presented.…”

Section: B Previous Workmentioning

confidence: 99%

See 2 more Smart Citations

Generalized Multicast Multibeam Precoding for Satellite Communications

Joroughi

Vázquez

Pérez-Neira

2017

IEEE Trans. Wireless Commun.

135

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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 User Groupingsupporting

confidence: 80%

Section: A Motivationmentioning

confidence: 98%

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Generalized Multicast Multibeam Precoding for Satellite Communications

Joroughi

Vázquez

Pérez-Neira

2017

IEEE Trans. Wireless Commun.

135

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“…The reason why we choose a C/I based threshold with the specified value can be found in [1], [5]. Basically, when pilots orthogonality lacks, the detectability of the CSI is mostly related to the interference level than the noise one (while the noise is predominant the other way round).…”

Section: Numerical Resultsmentioning

confidence: 99%

Optimized link adaptation for DVB-S2X precoded waveforms based on SNIR estimation

Andrenacci

Spano

Christopoulos³

et al. 2016

2016 50th Asilomar Conference on Signals, Systems and Computers

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Abstract-The present work deals with optimized strategies to address the issue of link adaptation (Adaptive Coding and Modulation -ACM) in a multi-user multi-beam satellite system employing precoding at the gateway side. Accordingly, the focus is on the forward link of a multi-beam satellite system employing a full frequency reuse configuration. In such an interference limited setting, the Super-Framing structure of DVB-S2X air interface (format specification 2 and 3) enables the use of precoding techniques. The aim herein is to investigate the Signal-to-Noiseplus-Interference (SNIR) estimation error given by the User Terminals (UTs) through the so-called P2 pilots is taken into account to optimize the ACM margins.

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“…In addition, even though the transmitter has an accurate version of the channel matrix, the achievable rates are reduced due to multicast transmission of general satellite standards [3] and other impairments [4].…”

Section: Introductionmentioning

confidence: 99%