Imperial College London

ProfessorBrunoClerckx

Faculty of EngineeringDepartment 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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176 results found

Joudeh H, Yi X, Clerckx B, Caire Get al., 2020, On the Optimality of Treating Inter-Cell Interference as Noise: Downlink Cellular Networks and Uplink-Downlink Duality, IEEE Transactions on Information Theory, Vol: 66, Pages: 6939-6961, ISSN: 0018-9448

© 1963-2012 IEEE. We consider the information-theoretic optimality of treating inter-cell interference as noise (multi-cell TIN) in downlink cellular networks. We focus on scenarios modeled by the Gaussian interfering broadcast channel (IBC), comprising K mutually interfering Gaussian broadcast channels (BCs), each formed by a base station communicating independent messages to an arbitrary number of users. We establish a new power allocation duality between the IBC and its dual interfering multiple access channel (IMAC), which entails that the corresponding generalized degrees-of-freedom regions achieved through multi-cell TIN and power control (TINA regions) for both networks are identical. As by-products of this duality, we obtain an explicit characterization of the IBC TINA region from a previously established characterization of the IMAC TINA region; and identify a multi-cell convex-TIN regime in which the IBC TINA region is a polyhedron (hence convex) without the need for time-sharing. We then identify a smaller multi-cell TIN regime in which the IBC TINA region is optimal and multi-cell TIN achieves the entire capacity region of the IBC, up to a constant gap. This is accomplished by deriving a new genie-aided outer bound for the IBC, that reveals a novel BC-type order that holds amongst users in each constituent BC (or cell) under inter-cell interference, which in turn is not implied by previously known BC-type orders (i.e. degraded, less noisy and more capable orders). The multi-cell TIN regime that we identify for the IBC coincides with a corresponding multi-cell TIN regime previously identified for the IMAC, hence establishing a comprehensive uplink-downlink duality of multi-cell TIN in the GDoF (and approximate capacity) sense.

Journal article

Mao Y, Clerckx B, 2020, Beyond Dirty Paper Coding for Multi-Antenna Broadcast Channel With Partial CSIT: A Rate-Splitting Approach, IEEE Transactions on Communications, Vol: 68, Pages: 6775-6791, ISSN: 0090-6778

Journal article

Yalcin AZ, Yuksel M, Clerckx B, 2020, Rate Splitting for Multi-Group Multicasting with a Common Message, IEEE Transactions on Vehicular Technology, Vol: 69, Pages: 12281-12285, ISSN: 0018-9545

© 1967-2012 IEEE. In this letter, precoding for max-min fairness (MMF) for multi-group multicasting with a common message is studied. The MMF problem is converted into a weighted mean square error minimization problem. A rate-splitting solution is proposed. In rate-splitting, multicast messages for each group are divided into private and common parts, and these common parts, together with the original common message are combined as a super common message. This super common message is superposed on or concatenated to the private multicast data vector, or it is transmitted via a mixed scheme. Simulations show that RS demonstrates significant gains especially in overloaded systems.

Journal article

Varasteh M, Rassouli B, Clerckx B, 2020, On Capacity-Achieving Distributions for Complex AWGN Channels Under Nonlinear Power Constraints and Their Applications to SWIPT, IEEE TRANSACTIONS ON INFORMATION THEORY, Vol: 66, Pages: 6488-6508, ISSN: 0018-9448

Journal article

Mao Y, Clerckx B, Zhang J, Li VOK, Arafah MAet al., 2020, Max-Min Fairness of K-User Cooperative Rate-Splitting in MISO Broadcast Channel with User Relaying, IEEE Transactions on Wireless Communications, Vol: 19, Pages: 6362-6376, ISSN: 1536-1276

© 2002-2012 IEEE. Cooperative Rate-Splitting (CRS) strategy, relying on linearly precoded rate-splitting at the transmitter and opportunistic transmission of the common message by the relaying user, has recently been shown to outperform typical Non-cooperative Rate-Splitting (NRS), Cooperative Non-Orthogonal Multiple Access (C-NOMA) and Space Division Multiple Access (SDMA) in a two-user Multiple Input Single Output (MISO) Broadcast Channel (BC) with user relaying. In this work, the existing two-user CRS transmission strategy is generalized to the K-user case. We study the problem of jointly optimizing the precoders, message split, time slot allocation, and relaying user scheduling with the objective of maximizing the minimum rate among users subject to a transmit power constraint at the base station. As the user scheduling problem is discrete and the entire problem is non-convex, we propose a two-stage low-complexity algorithm to solve the problem. Both centralized and decentralized relaying protocols based on selecting K{1} ( K{1} < K ) strongest users are first proposed followed by a Successive Convex Approximation (SCA)-based algorithm to jointly optimize the time slot, precoders and message split. Numerical results show that by applying the proposed two-stage algorithm, the worst-case achievable rate achieved by CRS is significantly increased over that of NRS and SDMA in a wide range of network loads (underloaded and overloaded regimes) and user deployments (with a diversity of channel strengths). Importantly, the proposed SCA-based algorithm dramatically reduces the computational complexity without any rate loss compared with the conventional algorithm in the literature of CRS. Therefore, we conclude that the proposed K-user CRS combined with the two-stage algorithm is more powerful than the existing transmission schemes.

Journal article

Joudeh H, Clerckx B, 2020, On the Separability of Parallel MISO Broadcast Channels Under Partial CSIT: A Degrees of Freedom Region Perspective, IEEE TRANSACTIONS ON INFORMATION THEORY, Vol: 66, Pages: 4513-4529, ISSN: 0018-9448

Journal article

Li Q, Wen M, Clerckx B, Mumtaz S, Al-Dulaimi A, Hu RQet al., 2020, Subcarrier Index Modulation for Future Wireless Networks: Principles, Applications, and Challenges, IEEE WIRELESS COMMUNICATIONS, Vol: 27, Pages: 118-125, ISSN: 1536-1284

Journal article

Hu Y, Yuan X, Yang T, Clerckx B, Schmeink Aet al., 2020, On the Convex Properties of Wireless Power Transfer With Nonlinear Energy Harvesting, IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, Vol: 69, Pages: 5672-5676, ISSN: 0018-9545

Journal article

Park J, Clerckx B, 2020, Multi-User Linear Precoding in Massively Distributed Polarized Antenna Systems Under Imperfect CSIT, IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, Vol: 69, Pages: 5268-5280, ISSN: 0018-9545

Journal article

Flores AR, de Lamare RC, Clerckx B, 2020, Linear Precoding and Stream Combining for Rate Splitting in Multiuser MIMO Systems, IEEE COMMUNICATIONS LETTERS, Vol: 24, Pages: 890-894, ISSN: 1089-7798

Journal article

Clerckx B, Mao Y, Schober R, Poor HVet al., 2020, Rate-Splitting Unifying SDMA, OMA, NOMA, and Multicasting in MISO Broadcast Channel: A Simple Two-User Rate Analysis, IEEE WIRELESS COMMUNICATIONS LETTERS, Vol: 9, Pages: 349-353, ISSN: 2162-2337

Journal article

Piovano E, Joudeh H, Clerckx B, 2020, Centralized and Decentralized Cache-Aided Interference Management in Heterogeneous Parallel Channels, Publisher: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

Working paper

Bacha M, Di Renzo M, Clerckx B, 2020, Treating Interference as Noise in Cellular Networks: A Stochastic Geometry Approach, IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, Vol: 19, Pages: 1918-1932, ISSN: 1536-1276

Journal article

Chen H, Mi D, Clerckx B, Chu Z, Shi J, Xiao Pet al., 2020, Joint Power and Subcarrier Allocation Optimization for Multigroup Multicast Systems With Rate Splitting, IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, Vol: 69, Pages: 2306-2310, ISSN: 0018-9545

Journal article

Xu C, Clerckx B, Zhang J, 2020, Multi-Antenna Joint Radar and Communications: Precoder Optimization and Weighted Sum-Rate vs Probing Power Tradeoff, IEEE ACCESS, Vol: 8, Pages: 173974-173982, ISSN: 2169-3536

Journal article

Bayguzina E, Clerckx B, 2019, Asymmetric Modulation Design for Wireless Information and Power Transfer With Nonlinear Energy Harvesting, IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, Vol: 18, Pages: 5529-5541, ISSN: 1536-1276

Journal article

Mao Y, Clerckx B, Li VOK, 2019, Rate-Splitting for Multi-Antenna Non-Orthogonal Unicast and Multicast Transmission: Spectral and Energy Efficiency Analysis, IEEE TRANSACTIONS ON COMMUNICATIONS, Vol: 67, Pages: 8754-8770, ISSN: 0090-6778

Journal article

Zhang J, Clerckx B, Ge J, Mao Yet al., 2019, Cooperative Rate Splitting for MISO Broadcast Channel With User Relaying, and Performance Benefits Over Cooperative NOMA, IEEE SIGNAL PROCESSING LETTERS, Vol: 26, Pages: 1678-1682, ISSN: 1070-9908

Journal article

Joudeh H, Clerckx B, 2019, On the optimality of treating inter-cell interference as noise in uplink cellular networks, IEEE Transactions on Information Theory, Vol: 65, Pages: 7208-7232, ISSN: 0018-9448

In this paper, we explore the information-theoretic optimality of treating interference as noise (TIN) in cellular networks. We focus on uplink scenarios modeled by the Gaussian interfering multiple access channel (IMAC), comprising K mutually interfering multiple access channels (MACs), each formed by an arbitrary number of transmitters communicating independent messages to one receiver. We define TIN for this setting as a scheme in which each MAC (or cell) performs a power-controlled version of its capacity-achieving strategy, with Gaussian codebooks and successive decoding, while treating interference from all other MACs (i.e. inter-cell interference) as noise. We characterize the generalized degrees-of-freedom (GDoF) region achieved through the proposed TIN scheme, and then identify conditions under which this achievable region is convex without the need for time-sharing. We then tighten these convexity conditions and identify a regime in which the proposed TIN scheme achieves the entire GDoF region of the IMAC and is within a constant gap of the entire capacity region.

Journal article

Varasteh M, Rassouli B, Clerckx B, 2019, SWIPT Signaling Over Frequency-Selective Channels With a Nonlinear Energy Harvester: Non-Zero Mean and Asymmetric Inputs, IEEE TRANSACTIONS ON COMMUNICATIONS, Vol: 67, Pages: 7195-7210, ISSN: 0090-6778

Journal article

Piovano E, Joudeh H, Clerckx B, 2019, Generalized degrees of freedom of the symmetric cache-aided MISO broadcast channel with partial CSIT, IEEE Transactions on Information Theory, Vol: 65, Pages: 5799-5815, ISSN: 0018-9448

We consider the cache-aided MISO broadcast channel (BC) in which a multi-antenna transmitter serves K singleantenna receivers, each equipped with a cache memory. The transmitter has access to partial knowledge of the channel state information. For a symmetric setting, in terms of channel strength levels, partial channel knowledge levels and cache sizes, we characterize the generalized degrees of freedom (GDoF) up to a constant multiplicative factor. The achievability scheme exploits the interplay between spatial multiplexing gains and codedmulticasting gain. On the other hand, a cut-set-based argument in conjunction with a GDoF outer bound for a parallel MISO BC under channel uncertainty are used for the converse. We further show that the characterized order-optimal GDoF is also attained in a decentralized setting, where no coordination is required for content placement in the caches.

Journal article

Clerckx B, Zhang R, Schober R, Ng DWK, Kim DI, Poor HVet al., 2019, Guest Editorial Wireless Transmission of Information and Power-Part II, IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS, Vol: 37, Pages: 249-252, ISSN: 0733-8716

Journal article

Mao Y, Clerckx B, Li VOK, 2019, Rate-Splitting Multiple Access for Coordinated Multi-Point Joint Transmission, IEEE International Conference on Communications (ICC), Publisher: IEEE, ISSN: 2164-7038

Conference paper

Varasteh M, Piovano E, Clerckx B, 2019, A LEARNING APPROACH TO WIRELESS INFORMATION AND POWER TRANSFER SIGNAL AND SYSTEM DESIGN, 44th IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), Publisher: IEEE, Pages: 4534-4538, ISSN: 1520-6149

Conference paper

Mao Y, Clerckx B, Li VOK, 2019, Rate-Splitting for Multi-User Multi-Antenna Wireless Information and Power Transfer, 20th IEEE International Workshop on Signal Processing Advances in Wireless Communications (SPAWC), Publisher: IEEE, ISSN: 2325-3789

Conference paper

Ouda MH, Mitcheson P, Clerckx B, 2019, Robust Wireless Power Receiver for Multi-Tone Waveforms, 49th European Microwave Conference (EuMC), Publisher: IEEE, Pages: 101-104, ISSN: 2325-0305

Conference paper

Varasteh M, Hoydis J, Clerckx B, 2019, Learning Modulation Design for SWIPT with Nonlinear Energy Harvester: Large and Small Signal Power Regimes, 20th IEEE International Workshop on Signal Processing Advances in Wireless Communications (SPAWC), Publisher: IEEE, ISSN: 2325-3789

Conference paper

Joudeh H, Clerckx B, 2019, DoF Region of the MISO BC with Partial CSIT: Proof by Inductive Fourier-Motzkin Elimination, Publisher: IEEE

Working paper

Zawawi ZB, Huang Y, Clerckx B, 2019, Multiuser Wirelessly Powered Backscatter Communications: Nonlinearity, Waveform Design, and SINR-Energy Tradeoff, IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, Vol: 18, Pages: 241-253, ISSN: 1536-1276

Journal article

Joudeh H, Yi X, Clerckx B, 2019, On Multi-Cell Uplink-Downlink Duality with Treating Inter-Cell Interference as Noise, Publisher: IEEE

Working paper

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