Efficient hybrid space-ground precoding techniques for multi-beam satellite systems

  • Haardt M.
  • Song N.
  • Yang T.

Multi-beam mobile satellite systems aim at providing broadband and high speed mobile services over a large area to achieve a high system throughput, where hybrid space-ground beamforming is one of the most promising candidates for ground-based beamforming techniques. It not only reduces the feeder link bandwidth to save spectral resources, ...

Minimum entropy pursuit: Noise analysis

  • Jalali S.
  • Poor H.

Universal compressed sensing algorithms recover a â??structuredâ?? signal from its under-sampled linear measurements, without knowing its distribution. The recently developed minimum entropy pursuit (MEP) optimization suggests a framework for developing universal compressed sensing algorithms. In the noiseless setting, among all signals that satisfy the measurement constraints, MEP seeks the â??simplestâ??. ...

Efficient large scale antenna selection by partial switching connectivity

  • Garcia-Rodriguez A.
  • Masouros C.
  • Rulikowski P.

In this work we analyze the benefits of low-complexity radio frequency (RF) switching matrices (SMs) for antenna selection (AS) in large scale antenna systems (LSAS). The reduced RF complexity and insertion losses (ILs) are attained by limiting the number of internal connections in the SM, at the expense of a ...

Joint alpha-fairness based DSM and user encoding ordering for zero-forcing nonlinear precoding in G. fast downstream transmission

  • Lanneer W.
  • Maes J.
  • Moonen M.
  • Tsiaflakis P.

In the G.fast frequency range with strong levels of crosstalk, nonlinear precoding (NLP) is proposed as a near-optimal technique for crosstalk precompensation in downstream transmission. While existing methods for multi-tone NLP user encoding ordering (UEO) are rather heuristic in how they approach fairness and suffer from substantial suboptimality, we develop ...

Double Relay Communication Protocol with power control for achieving fairness in cellular systems

  • Moonen M.
  • Orozco A.
  • Pollin S.
  • Rosas F.
  • Torrea-Duran R.
  • Tsiaflakis P.
  • Vandendorpe L.

The growing demand for wireless connectivity has turned bandwidth into a scarce resource that has to be carefully managed and fairly distributed to users. However, the variability of the wireless channel can severely degrade the service received by each user. The Double Relay Communication Protocol (DRCP) [1] is a transmission ...

Can Mobile Workforce Revolutionize Country-Scale Crowdsourcing?

  • Acer U.
  • Forlivesi C.
  • Godon M.
  • Kawsar F.
  • Van Den Broeck M.

Traditional urban-scale crowdsourcing approaches suffer from three caveats - lack of complete spatiotemporal coverage, lack of accurate information and lack of sustained engagement of crowd workers. We argue that mobile workforces roaming around the city (and the larger country) can overcome all three caveats if their daily activity routines embed ...

COMBINING BELIEF PROPAGATION AND SUCCESSIVE CANCELLATION LIST DECODING OF POLAR CODES ON A GPU PLATFORM

  • Cammerer S.
  • Hoydis J.
  • Leible B.
  • Stahl M.
  • Ten Brink S.

The decoding performance of polar codes strongly depends on the decoding algorithm used, while also the decoder throughput and its latency mainly depend on the decoding algorithm. In this work, we implement the powerful successive cancellation list (SCL) decoder on a GPU and identify the bottlenecks of this algorithm with ...

Building Connected Car Applications on Top of the World-Wide Streams Platform

  • Cortes M.
  • Dobbelaere P.
  • Hoste L.
  • Philips E.
  • Roelands M.
  • Sheykh Esmaili K.
  • Trappeniers L.
  • Van Cutsem T.
  • Van Raemdonck W.

The connected car is likely to play a fundamental role in the foreseeable Internet of Things. The connectivity aspect in combination with the available data (e.g. from GPS, on-board diagnostics, road sensors) and video (e.g. from dashcams and traffic cameras) streams enable a range of new applications, e.g., accident avoidance, ...

Tutorial: Reflections on Almost Two Decades of Research into Stream Processing

  • Sheykh Esmaili K.

Ever since the need for new approaches and systems to handle data streams was identified in early 2000s, stream processing has been an active area of research, resulting in a large body of work with significant impact. This tutorial reflects on this research history by highlighting a number of trends ...

Kafka versus RabbitMQ, A comparative study of two industry reference publish/subscribe implementations

  • Dobbelaere P.
  • Sheykh Esmaili K.

Apache Kafka and RabbitMQ are two popular publish/subscribe implementations that can be used when a multitude of data streams need to be connected between a set of producers and a set of con- sumers. They have some functional and non-functional features in common, which encourages software architects to compare them ...

FAST PATH LOCALIZATION ON GRAPHS VIA MULTISCALE VITERBI DECODING

  • Chen S.
  • Grover P.
  • Kar S.
  • Kovacevic J.
  • Maddahali M.
  • Yang Y.

We consider a problem of localizing the destination of an activated path signal supported on a graph. An “activated path signal” is a graph signal that evolves over time that can be viewed as the trajectory of a moving agent. We show that by combining dynamic programming and graph partitioning, ...

Multi-user Communication in Cloud Radio Access Network: Architecture, Coordination and Optimization

  • Boviz D.

In future mobile networks denser deployment of radio access points is planned to satisfy demand of higher throughput, but an increased number of mobile users can suffer from inter-cell interference. Fortunately, the centralization of base-band processing offered by Cloud Radio Access Network (C-RAN) architecture enables coordination and joint physical layer ...

Making the case for a real-time market of wireless resources with dynamic network slicing and sharing

  • Capone A.
  • Cesana Matteo
  • Malanchini I.
  • Suryaprakash V.

This position paper presents a new approach to infrastructure sharing for mobile networks based on the idea that network resources, both at the wireless access and the core network, can be traded dynamically on a real-time market where virtual operators or tenants compete to obtain the resource to get the ...

Access and metro network convergence for flexible end to end networks [invited]

  • A. Arbelaez
  • A. Di Giglio
  • Achouche M.
  • Bonk R.
  • C. Raack
  • G. Talli
  • H. Rohde
  • J. Montalvo
  • L. Quesada
  • M. Furdek
  • M. Ruffini
  • M. Schiano
  • N. J. Doran
  • N. Parsons
  • P. Townsend
  • Pfeiffer T.
  • R. Jensen
  • R. Wessaly

This paper reports on the architectural, protocol, physical layer and integrated testbed demonstrations carried out by the DISCUS FP7 consortium in the area of accessmetro network convergence. Our architecture modelling results show the vast potential for cost and power savings that node consolidation can bring. The architecture however also recognises ...

Semantically Enhanced Mapping Algorithm for Affinity-Constrained Service Function Chain Requests

  • Bouten N.
  • De Turck F.
  • Famaey J.
  • Latre S.
  • Mijumbi R.
  • Serrat J.

Network function virtualization (NFV) and software defined networking (SDN) have been proposed to increase the cost-efficiency, flexibility, and innovation in network service provisioning. This is achieved by leveraging IT virtualization techniques and combining them with programmable networks. By doing so, NFV and SDN are able to decouple the network functionality ...

Demo: A Green Small Cells Deployment in 5G - Switch ON/OFF via IoT Networks & Energy Efficient Mesh Backhauling

  • Al Agha Khaldoun
  • Allal Imed
  • Gourhant Yvon
  • Mongazon-Cazavet B.
  • Senouci Sidi-Mohammed

In this paper, we address the topic of the deployment of small cells in the future radio access network 5G. We propos our new and original switch ON/OFF mechanism for small cells base stations based on Low Power Wide Area Networks (LPWAN). Our proposal aims to completely shutdown the small ...

User Association and Resource Allocation Optimization in LTE Cellular Networks

  • Chen C.
  • Eitan Altman
  • Nessrine Trabelsi
  • Rachid El Azouzi
  • Roullet L.

As the demand for higher data rates is growing exponentially, homogeneous cellular networks have been facing limitations when handling data traffic. These limitations are related to the available spectrum and the capacity of the network. Heterogeneous Networks (HetNets), composed of Macro Cells (MCs) and Small Cells (SCs), are seen as ...

Dispersion management for nonlinearity mitigation in two-span 28 GBaud QPSK phase-sensitive amplifier links

  • Andrekson P.
  • Astra E.
  • Eliasson H.
  • Olsson S.

We present an investigation of dispersion map optimization for-span single channel 28 GBaud QPSK transmission systems with phase-sensitive amplifiers (PSAs). In experiments, when the PSA link is operated in a highly nonlinear regime, a 1.4 dB error vector magnitude (EVM) improvement is achieved compared to a one-span optimized dispersion map ...

Semi-analytical evaluation of concatenated RS/LDPC coding performance with finite block interleaving

  • Adriaan Suls
  • Guenach M.
  • Julie N.
  • Lefevre Y.
  • Marc M.

The Monte Carlo (MC) simulation of the error performance of a concatenated coding system with finite interleaving depth between the outer and inner codes is time-consuming, especially when targeting low error rates and examining several interleaver settings. In this contribution we present a semianalytical evaluation of the word error rate ...

power saving mechanism for contention-based M2M transmission

  • Wang H.
  • Yang L.

Massive number of devices must operate for a long time with very limited chance to contact energy sources in current Machine-to-Machine (M2M) networks, so power saving mechanism is very essential. In this paper, we analyze energy efficiency of two popular contention based data transmission methods (FSA and CTA) and proposed ...