Imperial College London
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ProfessorBrunoClerckx

Faculty of Engineering, Department of Electrical and Electronic Engineering

Professor of Wireless Communications and Signal Processing
 
 
 
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Contact

 

+44 (0)20 7594 6234b.clerckx Website

 
 
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Location

 

816Electrical EngineeringSouth Kensington Campus

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Summary

 

Publications

Publication Type
Year
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283 results found

Son H, Clerckx B, 2014, Joint Beamforming Design for Multi-User Wireless Information and Power Transfer, IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, Vol: 13, Pages: 6397-6409, ISSN: 1536-1276

Journal article

Park J, Clerckx B, Chun J, Jeong BJet al., 2014, Lattice Reduction-Aided Successive Interference Cancelation for MIMO Interference Channels, IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, Vol: 63, Pages: 4131-4135, ISSN: 0018-9545

Journal article

Park J, Clerckx B, 2014, Joint Wireless Information and Energy Transfer in a <i>K</i>-User MIMO Interference Channel, IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, Vol: 13, Pages: 5781-5796, ISSN: 1536-1276

Journal article

Park J, Clerckx B, 2014, MULTI-POLARIZED MULTI-USER MASSIVE MIMO: PRECODER DESIGN AND PERFORMANCE ANALYSIS, 22nd European Signal Processing Conference (EUSIPCO), Publisher: IEEE, Pages: 326-330, ISSN: 2076-1465

Conference paper

Song C, Ling C, Park J, Clerckx Bet al., 2014, MIMO Broadcasting for Simultaneous Wireless Information and Power Transfer: Weighted MMSE Approaches, IEEE Global Communications Conference (GLOBECOM), Publisher: IEEE, Pages: 1151-1156, ISSN: 2166-0069

Conference paper

Park J, Clerckx B, 2013, Joint Wireless Information and Energy Transfer in a Two-User MIMO Interference Channel, IEEE Transactions on Wireless Communications, Vol: 12, Pages: 4210-4221, ISSN: 1558-2248

EmailPrintRequest PermissionsThis paper investigates joint wireless information and energy transfer in a two-user MIMO interference channel, in which each receiver either decodes the incoming information data (information decoding, ID) or harvests the RF energy (energy harvesting, EH) to operate with a potentially perpetual energy supply. In the two-user interference channel, we have four different scenarios according to the receiver mode - (ID1, ID2), (EH1, EH2), (EH1, ID2), and (ID1, EH2). While the maximum information bit rate is unknown and finding the optimal transmission strategy is still open for (ID1, ID2), we have derived the optimal transmission strategy achieving the maximum harvested energy for (EH1, EH2). For (EH1, ID2), and (ID1, EH2), we find a necessary condition of the optimal transmission strategy and, accordingly, identify the achievable rate-energy (R-E) tradeoff region for two transmission strategies that satisfy the necessary condition - maximum energy beamforming (MEB) and minimum leakage beamforming (MLB). Furthermore, a new transmission strategy satisfying the necessary condition - signal-to-leakage-and-energy ratio (SLER) maximization beamforming - is proposed and shown to exhibit a better R-E region than the MEB and the MLB strategies. Finally, we propose a mode scheduling method to switch between (EH1, ID2) and (ID1, EH2) based on the SLER.

Journal article

Lim C, Yoo T, Clerckx B, Lee B, Shim Bet al., 2013, Recent Trend of Multiuser MIMO in LTE-Advanced, IEEE COMMUNICATIONS MAGAZINE, Vol: 51, Pages: 127-135, ISSN: 0163-6804

Journal article

Clerckx B, Lee H, Hong Y-J, Kim Get al., 2013, A Practical Cooperative Multicell MIMO-OFDMA Network Based on Rank Coordination, IEEE Transactions on Wireless Communications, Vol: 12, Pages: 1481-1491

An important challenge of wireless networks is to boost the cell edgeperformance and enable multi-stream transmissions to cell edge users.Interference mitigation techniques relying on multiple antennas andcoordination among cells are nowadays heavily studied in the literature.Typical strategies in OFDMA networks include coordinated scheduling,beamforming and power control. In this paper, we propose a novel and practicaltype of coordination for OFDMA downlink networks relying on multiple antennasat the transmitter and the receiver. The transmission ranks, i.e.\ the numberof transmitted streams, and the user scheduling in all cells are jointlyoptimized in order to maximize a network utility function accounting forfairness among users. A distributed coordinated scheduler motivated by aninterference pricing mechanism and relying on a master-slave architecture isintroduced. The proposed scheme is operated based on the user report of arecommended rank for the interfering cells accounting for the receiverinterference suppression capability. It incurs a very low feedback and backhauloverhead and enables efficient link adaptation. It is moreover robust tochannel measurement errors and applicable to both open-loop and closed-loopMIMO operations. A 20% cell edge performance gain over uncoordinated LTE-Asystem is shown through system level simulations.

Journal article

Hao C, Clerckx B, 2013, Imperfect and Unmatched CSIT is Still Useful for the Frequency Correlated MISO Broadcast Channel, 2013 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS (ICC), Pages: 3181-3186, ISSN: 1550-3607

Journal article

Hao C, Clerckx B, 2013, MISO Broadcast Channel with Imperfect and (Un)matched CSIT in the Frequency Domain: DoF Region and Transmission Strategies, IEEE 24th International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), Publisher: IEEE, Pages: 1168-1173

Conference paper

Park J, Clerckx B, 2013, Transmission Strategies for Joint Wireless Information and Energy Transfer in a Two-User MIMO Interference Channel, IEEE International Conference on Communications (ICC), Publisher: IEEE, Pages: 591-595, ISSN: 2164-7038

Conference paper

Hao C, Clerckx B, 2012, Degrees-of-Freedom Region of Time Correlated MISO Broadcast Channel with Perfect Delayed CSIT and Asymmetric Partial Current CSIT

The impact of imperfect CSIT on the degrees of freedom (DoF) of a timecorrelated MISO Broadcast Channel has drawn a lot of attention recently.Maddah-Ali and Tse have shown that the completely stale CSIT still benefit theDoF. In very recent works, Yang et al. have extended the results by integratingthe partial current CSIT for a two-user MISO broadcast channel. However, thoseresearches so far focused on a symmetric case. In this contribution, weinvestigate a more general case where the transmitter has knowledge of currentCSI of both users with unequal qualities. The essential ingredient in our worklies in the way to multicast the overheard interference to boost the DoF. Theoptimal DoF region is simply proved and its achievability is shown using anovel transmission scheme assuming an infinite number of channel uses.

Journal article

Boccardi F, Clerckx B, Ghosh A, Hardouin E, Jongren G, Kusume K, Onggosanusi E, Tang Yet al., 2012, Multiple-Antenna Techniques in LTE-Advanced, IEEE COMMUNICATIONS MAGAZINE, Vol: 50, Pages: 114-121, ISSN: 0163-6804

Journal article

Lee D, Seo H, Clerckx B, Hardouin E, Mazzarese D, Nagata S, Sayana Ket al., 2012, Coordinated Multipoint Transmission and Reception in LTE-Advanced: Deployment Scenarios and Operational Challenges, IEEE COMMUNICATIONS MAGAZINE, Vol: 50, Pages: 148-155, ISSN: 0163-6804

Journal article

Choi J, Clerckx B, Lee N, Kim Get al., 2012, A New Design of Polar-Cap Differential Codebook for Temporally/Spatially Correlated MISO Channels, IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, Vol: 11, Pages: 703-711, ISSN: 1536-1276

Journal article

Kim T, Love DJ, Clerckx B, 2011, On the Spatial Degrees of Freedom of Multicell and Multiuser MIMO Channels

We study the converse and achievability for the degrees of freedom of themulticellular multiple-input multiple-output (MIMO) multiple access channel(MAC) with constant channel coefficients. We assume L>1 homogeneous cells withK>0 users per cell where the users have M antennas and the base stations areequipped with N antennas. The degrees of freedom outer bound for this L-celland K-user MIMO MAC is formulated. The characterized outer bound uses insightfrom a limit on the total degrees of freedom for the L-cell heterogeneous MIMOnetwork. We also show through an example that a scheme selecting a transmitterand performing partial message sharing outperforms a multiple distributedtransmission strategy in terms of the total degrees of freedom. Simple linearschemes attaining the outer bound (i.e., those achieving the optimal degrees offreedom) are explores for a few cases. The conditions for the required spatialdimensions attaining the optimal degrees of freedom are characterized in termsof K, L, and the number of transmit streams. The optimal degrees of freedom forthe two-cell MIMO MAC are examined by using transmit zero forcing and nullspace interference alignment and subsequently, simple receive zero forcing isshown to provide the optimal degrees of freedom for L>1. By the uplink anddownlink duality, the degrees of freedom results in this paper are alsoapplicable to the downlink. In the downlink scenario, we study the degrees offreedom of L-cell MIMO interference channel exploring multiuser diversity.Strong convergence modes of the instantaneous degrees of freedom as the numberof users increases are characterized.

Journal article

Hwang D, Choi J, Clerckx B, Kim Get al., 2011, MIMO Precoder Selections in Decode-Forward Relay Networks with Finite Feedback, IEEE TRANSACTIONS ON COMMUNICATIONS, Vol: 59, Pages: 1785-1790, ISSN: 0090-6778

Journal article

H Moon, B Clerckx, F Khan, 2011, Cooperative Cellular Wireless Networks, Cooperative Cellular Wireless Networks, Editors: Hossain, Kim, Bhargava, Publisher: Cambridge Univ Pr, ISBN: 9780521767125

A self-contained guide to the state-of-the-art in cooperative communications and networking techniques for next generation cellular wireless systems, this ...

Book chapter

Kim T, Love DJ, Clerckx B, 2011, Does Frequent Low Resolution Feedback Outperform Infrequent High Resolution Feedback for Multiple Antennas Beamforming Systems?, IEEE Trans. on Signal Proc., Vol: 59, Pages: 1654-1669

Journal article

Kim T, Love DJ, Clerckx B, 2011, MIMO System with Limited Rate Differential Feedback in Slow Varying Channel, IEEE Trans. on Comm, Vol: 59, Pages: 1175-1189

Journal article

Je HW, Lee H, Kwak K, Choi S, Hong Y-J, Clerckx Bet al., 2011, Long-Term Channel Information-Based CoMP Beamforming in LTE-Advanced Systems, 54th Annual IEEE Global Telecommunications Conference (GLOBECOM), Publisher: IEEE, ISSN: 1930-529X

Conference paper

Kim T, Love DJ, Clerckx B, Hwang Det al., 2011, Spatial Degrees of Freedom of the Multicell MIMO Multiple Access Channel., Publisher: IEEE, Pages: 1-5

Conference paper

Clerckx B, Lee H, Hong Y-J, Kim Get al., 2011, Rank Recommendation-based Coordinated Scheduling for Interference Mitigation in Cellular Networks, 54th Annual IEEE Global Telecommunications Conference (GLOBECOM), Publisher: IEEE, ISSN: 1930-529X

Conference paper

Lee N, Shin W, Hong Y-J, Clerckx Bet al., 2011, Two-cell MISO Interfering Broadcast Channel with Limited Feedback: Adaptive Feedback Strategy and Multiplexing Gains, IEEE International Conference on Communications (ICC), Publisher: IEEE, ISSN: 1550-3607

Conference paper

Kim T, Love DJ, Clerckx B, 2011, Instantaneous Degrees of Freedom of Downlink Interference Channels with Multiuser Diversity, 45th Asilomar Conference on Signals, Systems and Computers (ASILOMAR), Publisher: IEEE, Pages: 1293-1297, ISSN: 1058-6393

Conference paper

Kim T, Love DJ, Clerckx B, Hwang Det al., 2011, Spatial Degrees of Freedom of the Multicell MIMO Multiple Access Channel, 2011 IEEE GLOBAL TELECOMMUNICATIONS CONFERENCE (GLOBECOM 2011), ISSN: 1930-529X

Journal article

Clerckx B, Kim Y, Lee H, Cho J, Lee Jet al., 2011, Coordinated Multi-Point Transmission in Heterogeneous Networks: A Distributed Antenna System Approach, 54th IEEE International Midwest Symposium on Circuits and Systems (MWSCAS), Publisher: IEEE, ISSN: 1548-3746

Conference paper

Kim T, Clerckx B, Love DJ, Kim SJet al., 2010, Limited Feedback Beamforming Systems for Dual-Polarized MIMO Channels, IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, Vol: 9, Pages: 3425-3439, ISSN: 1536-1276

Journal article

Lee N, Shin W, Clerckx B, 2010, Interference Alignment with Limited Feedback on Two-cell Interfering Two-User MIMO-MAC

In this paper, we consider a two-cell interfering two-user multiple-inputmultiple-output multiple access channel (MIMO-MAC) with limited feedback. Wefirst investigate the multiplexing gain of such channel when users have perfectchannel state information at transmitter (CSIT) by exploiting an interferencealignment scheme. In addition, we propose a feedback framework for theinterference alignment in the limited feedback system. On the basis of theproposed feedback framework, we analyze the rate gap loss and it is shown thatin order to keep the same multiplexing gain with the case of perfect CSIT, thenumber of feedback bits per receiver scales as $B \geq(M\!-1\!)\!\log_{2}(\textsf{SNR})+C$, where $M$ and $C$ denote the number oftransmit antennas and a constant, respectively. Throughout the simulationresults, it is shown that the sum-rate performance coincides with the derivedresults.

Conference paper

Li Q, Li G, Lee W, Lee M-I, Mazzarese D, Clerckx B, Li Zet al., 2010, MIMO Techniques in WiMAX and LTE: A Feature Overview, IEEE COMMUNICATIONS MAGAZINE, Vol: 48, Pages: 86-92, ISSN: 0163-6804

Journal article

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