%0 Book Section
%9 Chapitre
%+ Université catholique de Louvain (UCL) - SST/ICTM/ELEN - Pôle en ingénierie électrique
%A Yao Cheng
%A Rottenberg, François
%A Louveaux, Jérôme
%A Eleftherios Kofidis
%A Martin Haardt
%T FBMC Distributed and Cooperative Systems
%X Distributed and cooperative systems exploit the benefits of Multiple-Input Multiple-Output (MIMO) in a flexible manner and are regarded as key enabling technologies for efficient spectrum utilization. Perfect synchronization, though stringently required, proves to be difficult to guarantee in such sophisticated communication scenarios. One intriguing advantage of FilterBank MultiCarrier (FBMC) in general and of its Offset-Quadrature Amplitude Modulation (OQAM) version in particular, is its strong resilience to synchronization errors. This makes it a promising multicarrier modulation scheme for distributed and cooperative systems, which is the focus of this chapter. First, we present FBMC-based Coordinated Multi-Point (CoMP) schemes. Partial coordination of adjacent cells is enabled to assist cell edge users to combat the intracell interference, the intercell interference, and the greater path loss compared to cell interior users. This is achieved via an Intrinsic Interference Mitigating Coordinated Beamforming (IIM-CBF) scheme, which jointly and iteratively computes the precoding and the decoding matrices for each subcarrier. Second, channel state information acquisition, which is a requirement in order to implement the schemes presented in the first part, is addressed for FBMC-based distributed systems. Preamble-based techniques are analyzed, and a study is performed of the influence of the assignment of pilot subcarriers to different base stations. Then, a method of tracking channel estimates for the distributed MIMO downlink is also investigated that does not require any pilot and only relies on the feedback of Signal-to-Noise Ratio (SNR) measurements.
%K Distributed and cooperative systems; Multiple-input-multiple-output; Filterbank multicarrier; Offset-QAM modulation; FBMC-based coordinated multi-point; Intrinsic interference mitigating coordinated beamforming; Signal-to-noise ratio; Preamble-based multiuser channel estimation; Subcarrier assignment scheme; Linear minimum mean squared error
%G Anglais
%B Orthogonal Waveforms and Filter Banks for Future Communication Systems
%E Markku Renfors, Xavier Mestre, Eleftherios Kofidis, Faouzi Bader
%I Elsevier
%D 2017
%U http://www.sciencedirect.com/science/article/pii/B9780128103845000165
%U Handle: http://hdl.handle.net/2078.1/189985
%R 10.1016/B978-0-12-810384-5.00016-5
%* peer-reviewed
%0 Book Section
%9 Chapitre
%+ Université catholique de Louvain (UCL) - SST/ICTM/ELEN - Pôle en ingénierie électrique
%A Louveaux, Jérôme
%A Martin Fuhrwerk
%A Davide Mattera
%A Markku Renfors
%A Mario Tanda
%T FBMC Synchronization Techniques
%X Synchronization is a crucial operation in multicarrier systems. Similarly to Orthogonal Frequency-Division Multiplexing (OFDM), FilterBank MultiCarrier with Offset-QAM subcarrier modulation (FBMC/OQAM) systems require good frequency offset and symbol timing synchronization. However they usually have slightly relaxed synchronization requirements with respect to OFDM as the residual errors can be efficiently corrected by a multitap equalizer if it is present. In this chapter, several synchronization techniques are presented for coping with symbol timing offset and carrier frequency offset, which may be based on training input (preamble or scattered pilots) or be blind. In addition, both time domain and frequency domain implementations are studied. Finally, an asynchronous multi-user uplink scenario is analyzed, where the fast-convolution filter bank structure is used to enable simultaneous processing of non-synchronized signals from different users.
%K Synchronization of multicarrier systems
%K Symbol timing Offset
%K Carrier frequency offset
%K Preamble
%K Scattered pilots
%K Time domain processing
%K Frequency domain processing
%K Asynchronous multiuser transmission
%G Anglais
%B Orthogonal Waveforms and Filter Banks for Future Communication Systems
%E Markku Renfors, Xavier Mestre, Eleftherios Kofidis, Faouzi Bader
%I Elsevier
%D 2017
%U https://www.sciencedirect.com/science/article/pii/B9780128103845000104
%U Handle: http://hdl.handle.net/2078.1/200212
%R 10.1016/B978-0-12-810384-5.00010-4
%* peer-reviewed
%0 Book Section
%9 Chapitre
%+ Université catholique de Louvain (UCL) - SST/ICTM/ELEN - Pôle en ingénierie électrique
%+ CTTC - Barcelona
%A Devillers, Bertrand
%A Louveaux, Jérôme
%T Introduction to wireless multi-carrier schemes
%X Multi-carrier schemes have long been known to be an efficient solution for dealing with frequency selective channels, and have become a key component for modern wireless communication systems. In fact, in order to achieve high data rates, current and future wireless systems are forced to operate on broad bandwidth, in which the channel typically features frequency selectivity. This chapter gives an introduction to multi-carrier systems, and pursues four main objectives. Firstly, the multipath propagation effect is described, and the equivalent discrete-time multi-tap channel is derived. Secondly, the concept of cyclic prefix is introduced, and from there the orthogonal frequency division multiplexing (OFDM) modulation is thoroughly derived. Thirdly, the main features of the OFDM modulation are analyzed and compared to its single-carrier counterpart, known as single-carrier with frequency domain equalization (SC-FDE). In fact, OFDM and SC-FDE share the nice property of the one-tap frequency domain equalization. However, on top of this, the OFDM modulation has the two following advantages: (i) high data rates can be achieved by adaptively allocating the resources among the subcarriers, (ii) OFDM intrinsically offers a multiple access in the frequency domain with fine granularity in the bandwidth allocation among users, known as orthogonal frequency division multiple access (OFDMA). Finally, an introduction to filter banks multi-carrier (FBMC) systems is given. At the expense of an increased complexity, it is shown how FBMC provides several advantages of robustness and flexibility with respect to OFDM, by replacing the discrete Fourier transform with a filter bank with better spectral selectivity.
%K OFDM
%K Multiple access
%K OFDMA
%K SC-FDE
%K filter bank based multicarrier (FBMC)
%K ICTEAM
%K COMM
%G Anglais
%B Advances on processing for multiple carrier schemes OFDM and OFDMA
%E Faouzi Bader; Nizar Zorba
%I Nova Science Publishers
%C New York
%D 2012
%S Computer Science, Technology and Applications
%U Handle: http://hdl.handle.net/2078.1/120189
%0 Book Section
%9 Chapitre
%+ Université catholique de Louvain (UCL) - SST/ICTM/ELEN - Pôle en ingénierie électrique
%A Oestges, Claude
%A Czink, Nicolai
%A De Doncker, Philippe
%A Degli-Esposti, Vittorio
%A Haneda, Katsuyuki
%A Joseph, Wout
%A Liénard, Martine
%A Liu, Lingfeng
%A Molina-Garcia-Pardo, Jose
%A Narandzic, Milan
%A Poutanen, Juho
%A Quitin, François
%A Tanghe, Emmeric
%T Radio channel modeling for 4G networks
%K ICTEAM:COMM
%G Anglais
%B Pervasive mobile and ambient wireless communications
%E Roberto Verdone, Alberto Zanella
%I Springer-Verlag
%C London
%D 2012
%U Handle: http://hdl.handle.net/2078.1/113378
%0 Book Section
%9 Chapitre
%+ Université catholique de Louvain (UCL) - SST/ICTM/ELEN - Pôle en ingénierie électrique
%A Bacci, Giacomo
%A Closas, Pau
%A D'Amico, Antonio
%A Dardari, Davide
%A Fernandez-Prades, Carles
%A Fontanella, Diana
%A Gezici, Sinan
%A Luise, Marco
%A Mallat, Achraf
%A Mengali, Umberto
%A Najar, Montse
%A Nicoli, Monica
%A Oestges, Claude
%A Vandendorpe, Luc
%T Fundamental Limits in the Accuracy of Wireless Positioning
%X Several factors impact in practice on the achievable accuracy of wireless positioning systems. However, theoretical bounds can be set to determine the best accuracy one may expect in certain conditions and to obtain useful benchmarks when assessing the performance of practical schemes. Chapter 4 is dedicated to the presentation of several such bounds, most derived from the Cramér-Rao bound (CRB) framework. Theoretical performance bounds related to the ranging estimation via time-of-arrival (TOA) from UWB signals are derived and discussed, also taking into account critical conditions such as the multipath propagation. Also the improved Ziv-Zakai bound family is introduced as a tighter benchmark in the case of dense scattering, where the CRB falls in the ambiguity region. Then, novel results are presented, related to the derivation of performance limits for innovative positioning approaches, such as direct position estimation (DPE) in GNSS, cooperative terrestrial localization, and a recent analysis on the interference-prone systems, such as multicarrier systems.
%K ICTEAM:COMM
%G Anglais
%B Satellite and Terrestrial Radio Positioning Techniques: A signal processing perspective
%E Davide Dardari, Marco Luise and Emanuela Falletti
%I Academic Press
%D 2011
%U Handle: http://hdl.handle.net/2078.1/117971
%R 10.1016/B978-0-12-382084-6.00004-0
%0 Book Section
%9 Chapitre
%+ Université catholique de Louvain (UCL) - SST/ICTM/ELEN - Pôle en ingénierie électrique
%+ Electrabel - Elia
%+ INRIA - IRISA
%+ Alcatel - Espace
%+ COMSIS - RD
%A Sneessens, Harold
%A Vandendorpe, Luc
%A Herzet, Cédric
%A Wautelet, Xavier
%A Oguz, Onur
%T MIMOFrom Theory to Implementation : Advanced Transmitter andReceiver Design
%K MIMO
%K Receiver design
%K Signal processing
%K ICTEAM:COMM
%K ICTEAM:SIGN
%G Anglais
%B MIMO From Theory to Implementation
%I Elsevier
%D 2011
%U Handle: http://hdl.handle.net/2078.1/83800
%R 10.1016/B978-0-12-382194-2.00005-8
%0 Book Section
%9 Chapitre
%+ TU Wien - Faculty of Electrical Engineering and Information Technology
%+ IST - TUL
%+ CRC
%+ TU Karlsruhe
%+ Université catholique de Louvain (UCL) - SST/ICTM/ELEN - Pôle en ingénierie électrique
%A Bonek, Ernst
%A Correia, Luis
%A Bultitude, Robert
%A Kuhnert, Christina
%A Oestges, Claude
%T MIMO channel modeling
%K ICTEAM:COMM
%G Anglais
%B Mobile broadband multimedia networks: techniques, models and tools for 4G
%E Luis Correia
%I Academic Press
%D 2006
%U Handle: http://hdl.handle.net/2078.1/113382
%0 Book Section
%9 Chapitre
%+ Université catholique de Louvain (UCL) - SST/ICTM/ELEN - Pôle en ingénierie électrique
%A Vandendorpe, Luc
%T Sécurité des systèmes d'information
%K Sécurité
%K Biométrie
%K ICTEAM:COMM
%G Français
%B Authentification biométrique
%D 2006
%S Hermes Science Publication
%U Handle: http://hdl.handle.net/2078.1/83801
%7
%0 Report
%9 Externe
%A Louveaux, Jérôme
%A Van Bruyssel, D
%+ Université catholique de Louvain (UCL) - SST/ICTM/ELEN - Pôle en ingénierie électrique
%T G.VDSL: Evaluation of Point to Multipoint channel estimation by abuse of receivers
%X In this document, we analyze the estimation algorithm proposed by I. Ilani in a contribution to the standardization [1]. The algorithm is briefly described and formalized. The performance of this algorithm is then analyzed.
%G Anglais
%U Handle: http://hdl.handle.net/2078.1/137456