Access Technologies
Overview
The Access Technologies (AT) Area is devoted to the study, design, and optimization of Access Networks. It is structured into two core research lines:
The Cognitive and Multicarrier Networks Research Line aims at improving the performance and robustness of wireless access systems, including Local and Wide Area Networks (mainly based on 802.11/16 technology) as well as cellular networks (3GPP UMTS and LTE-A). Its core objectives are the design of intelligent, cognitive network architectures that are able to optimize the resource allocation either in a centralized or a distributed fashion. In order to achieve this goal, properties of advanced multi-carrier radio interfaces, including filter banks and single-carrier with frequency domain equalization are exploited. This research line also focuses on purpose-driven networks such as wireless sensor networks, vehicular networks, and satellite broadband and mobile systems. Advanced mathematical tools from optimization theory, game theory, machine learning and detection and estimation theory are widely used to solve the problems described.
The Network Information Theory Research Line studies the theoretical limits on the capacity of networks, with a special interest on wireless scenarios. Wireless networks are evolving from single to multiple wireless hops, and their performance is being pushed closer to their physical limits. We use network information theory to produce results on the limits of achievable capacity of these networks, which provide useful insights into the design of practical systems. This research line also focuses on the design of coding and transmission schemes at a network level, also known as network coding. Finally, another area of interest is joint source-channel coding for enhanced multimedia transmission.
Application-driven research also falls within the scope of the AT Area, mainly in the areas of health, intelligent transportation systems, and machine-type communications in general.
For up-to-date information, recent news, and upcoming events, visit the Wiki of the Access Technology Area.
Publications
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A. Moragrega, P. Closas, C. Ibars, Supermodular Game for Power Control in TOA-based Positioning, IEEE Transactions on Signal Processing, Vol. 61, No. 12, pp. 3246-3259, June 2013. -
Hamza Soury, F. Bader, M. Shaat, and M. Slim Alouini, Near Optimal Power Allocation Algorithm for OFDM-Based Cognitive Using Adaptive Relaying Strategy, the 7th International Conference on Cognitive Radio Oriented Wireless Networks (CrownCom'2012), June 18–20, 2012 Stockholm (Sweden). -
A. Moragrega, P. Closas, C. Ibars, Supermodular game for energy efficient TOA-based positioning, in Proceedings of the IEEE International Workshop on Signal Processing Advances for Wireless Communications (SPAWC 2012), 17-20 June 2012, Cesme (Turkey).
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C. Ibars, M. Navarro, C. Fernández-Prades, X. Artiga, A. Moragrega, C. George-Gavrincea, A. Mollfulleda, M. Nájar, Filter bank transceiver design for ultra wideband, Chapter in "Ultra Wideband", edited by B. Lembrikov. IN-TECH Online 2010, ISBN 978-953-307-139-8. Available online at http://www.intechopen.com/ -
D. Gündüz, J. Gómez-Vilardebó, Smart Meter Privacy in the Presence of an Alternative Energy Source, in Proceedings of IEEE International Conference on Communications (ICC), 9-13 June 2013, Budapest, (Hungary).
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G. Cocco, Application of Network Coding in Satellite Broadcast and Multiple Access Channels, PhD Dissertation, Universitat Politècnica de Catalunya, February 12, 2013. -
G. Piro, M. Miozzo, G. Forte, N. Baldo, L.A. Grieco, G. Boggia, P. Dini, HetNets Powered by Renewable Energy Sources - Sustainable Next-Generation Cellular Networks, IEEE Internet Computing, February 2013.
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G. Cocco, C. Ibars, N. Alagha, Cooperative Coverage Extension in Heterogeneous Machine-to-Machine Networks, in proceedings of IEEE Global Communications Conference Exhibition & Industry Forum (GLOBECOM 2012): Second International Workshop on Machine-to-Machine Communications 'Key' to the Future Internet of Things (GC'12 Workshop-IWM2M), 3-7 December 2012, Anaheim,California (USA).
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B. Devillers, J. Louveaux, Introduction to wireless multi-carrier schemes, Chapter in "Advances on processing for multiple carrier schemes: OFDM & OFDMA", edited by F. Bader and N. Zorba, NOVA Science Publisher, 2012, ISBN: 978-1-61470-834-6.
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O. Tan, D. Gündüz, H. Vincent Poor , Smart Meter Privacy in the Presence of Energy Harvesting and Storage Devices, In Proceedings of 3rd IEEE International Conference on Smart Grid Communications (SmartGridComm), Cognitive and M2M Communications and Networking for Smart Grid Workshop, 5-8 November 2012, Tainan City (Taiwan).
