no code implementations • 31 Jan 2025 • Farjam Karim, Nurul Huda Mahmood, Arthur S. de Sena, Deepak Kumar, Bruno Clerckx, Matti Latva-aho
Finally, our comparison with non-orthogonal multiple access (NOMA) highlights the outage performance trade-offs between RSMA and NOMA.
no code implementations • 3 Jan 2025 • Amirhossein Azarbahram, Onel L. A. López, Bruno Clerckx, Marco Di Renzo, Matti Latva-aho
Motivated by this, we consider a single-input single-output BD-RIS-aided RF-WPT system and we formulate a joint beamforming and waveform optimization problem aiming to maximize the harvested power at the receiver.
no code implementations • 20 Dec 2024 • Zheyu Wu, Bruno Clerckx
We also compare the performance of various BD-RIS architectures in MU-MISO systems using the proposed approach, which has not been explored before due to the lack of an architecture-independent framework.
no code implementations • 16 Dec 2024 • Xinze Lyu, Sundar Aditya, Bruno Clerckx
A canonical use case of Integrated Sensing and Communications (ISAC) in multiple-input multiple-output (MIMO) systems involves a multi-antenna transmitter communicating with $K$ users and sensing targets in its vicinity.
no code implementations • 9 Dec 2024 • Bruno Sokal, Fazal-E-Asim, André L. F. de Almeida, Hongyu Li, Bruno Clerckx
Beyond diagonal reconfigurable intelligent surface (BD-RIS) is a new architecture for RIS where elements are interconnected to provide more wave manipulation flexibility than traditional single connected RIS, enhancing data rate and coverage.
no code implementations • 27 Nov 2024 • Ziang Liu, Hongyu Li, Bruno Clerckx
In this paper, we model the BD RIS-assisted FD systems, where the impact of BD-RIS non-reciprocity and that of structural scattering, which refers to the specular reflection generated by RIS when the RIS is turned OFF, are explicitly captured.
no code implementations • 7 Nov 2024 • Hongyu Li, Bruno Clerckx
With the considered channel model, we investigate the effect of BD-RIS non-reciprocity and identify the theoretical conditions for reciprocal and non-reciprocal BD-RISs to simultaneously achieve the maximum received power of the signal of interest in the uplink and the downlink.
no code implementations • 19 Aug 2024 • Hamad Yahya, Hongyu Li, Matteo Nerini, Bruno Clerckx, Merouane Debbah
In addition, at moderate to high signal to noise ratios (SNRs), passive interference nulling reduces the complexity at the BS by relaxing the need for precoding or water-filling power allocation design.
no code implementations • 4 Aug 2024 • Huizhi Wang, Chao Feng, Yong Zeng, Shi Jin, Chau Yuen, Bruno Clerckx, Rui Zhang
Given the same number of array elements, the performance of sparse MIMO is compared with conventional MIMO.
no code implementations • 29 Jul 2024 • André L. F. de Almeida, Bruno Sokal, Hongyu Li, Bruno Clerckx
Specifically, while the first enjoys fast and parallel extraction of the channel estimates in closed form, the second has a more flexible training design, allowing for a significantly reduced training overhead compared to the state-of-the-art LS method.
1 code implementation • 21 Jul 2024 • Yang Zhao, Hongyu Li, Massimo Franceschetti, Bruno Clerckx
This paper investigates the capability of a passive Reconfigurable Intelligent Surface (RIS) to redistribute the singular values of point-to-point Multiple-Input Multiple-Output (MIMO) channels for achieving power and rate gains.
no code implementations • 1 Jul 2024 • Rafael Cerna Loli, Bruno Clerckx
Therefore, in the large scale regime, the astronomically large complexity of these optimization algorithms prohibits their use and prevents assessing large scale wireless systems performance under optimized conditions.
no code implementations • 22 Jun 2024 • Yumeng Zhang, Xiaodan Shao, Hongyu Li, Bruno Clerckx, Rui Zhang
The multi-sector intelligent surface (IS), benefiting from a smarter wave manipulation capability, has been shown to enhance channel gain and offer full-space coverage in communications.
no code implementations • 21 Jun 2024 • Xinze Lyu, Sundar Aditya, Bruno Clerckx
Over these cases, we observe that RSMA-based MGM achieves fairness at a higher throughput for each group than SDMA- and NOMA-based MGM.
no code implementations • 12 May 2024 • Hongyu Li, Matteo Nerini, Shanpu Shen, Bruno Clerckx
We next characterize the frequency dependence of the BD-RIS response based on circuit models.
no code implementations • 12 Apr 2024 • Ziang Liu, Ayush Bhandari, Bruno Clerckx
The success of full-stack full-duplex communication systems depends on how effectively one can achieve digital self-interference cancellation (SIC).
no code implementations • 12 Apr 2024 • Xinze Lyu, Sundar Aditya, Bruno Clerckx
Non-orthogonal unicast multicast (NOUM) is a variant of multi-antenna multi-user communications where the users desire a shared message (multicast) in addition to their respective unique messages (unicast).
no code implementations • 26 Mar 2024 • Hongyu Li, Shanpu Shen, Yumeng Zhang, Bruno Clerckx
In this paper, we study channel estimation and beamforming design for BD-RIS aided multi-antenna systems.
no code implementations • 14 Feb 2024 • Ziang Liu, Longfei Yin, Wonjae Shin, Bruno Clerckx
Currently, two fundamental challenges, namely, inter-beam interference among users and power limitation at the LEO satellites, limit the full potential of the joint design of sensing and communication.
no code implementations • 31 Oct 2023 • Yumeng Zhang, Sundar Aditya, Bruno Clerckx
To characterize the ISCAP performance region, we assume symbols with non-zero mean asymmetric Gaussian distribution (i. e., the input distribution), and optimize its mean and variance at each subcarrier to maximize the harvested power, subject to constraints on the achievable rate (communications) and the average side-to-peak-lobe difference (sensing).
no code implementations • 4 Oct 2023 • Hongyu Li, Shanpu Shen, Matteo Nerini, Marco Di Renzo, Bruno Clerckx
This work studies the modeling and optimization of beyond diagonal reconfigurable intelligent surface (BD-RIS) aided wireless communication systems in the presence of mutual coupling among the RIS elements.
no code implementations • 17 Jul 2023 • Rafael Cerna Loli, Bruno Clerckx
In this letter, we propose the use of a meta-learning based precoder optimization framework to directly optimize the Rate-Splitting Multiple Access (RSMA) precoders with partial Channel State Information at the Transmitter (CSIT).
no code implementations • 12 Jul 2023 • Hongyu Li, Yumeng Zhang, Bruno Clerckx
We study channel estimation for a beyond diagonal reconfigurable intelligent surface (BD-RIS) aided multiple input single output system.
no code implementations • 12 May 2023 • Xinze Lyu, Sundar Aditya, JungHoon Kim, Bruno Clerckx
In multi-user multi-antenna communications, it is well-known in theory that Rate-Splitting Multiple Access (RSMA) can achieve a higher spectral efficiency than both Space Division Multiple Access (SDMA) and Non-Orthogonal Multiple Access (NOMA).
no code implementations • 11 May 2023 • Yumeng Zhang, Sundar Aditya, Bruno Clerckx
However, the overall power allocation (i. e., the sum of mean and variance) across the OFDM subcarriers and symbols is similar to (1).
no code implementations • 3 Apr 2023 • Longfei Yin, Ziang Liu, Bhavani Shankar M. R., Mohammad Alaee-Kerahroodi, Bruno Clerckx
Extreme crowding of electromagnetic spectrum in recent years has led to the challenges in designing sensing and communications systems.
no code implementations • 14 Feb 2023 • Zhenyuan Feng, Bruno Clerckx
The design of beamforming for downlink multi-user massive multi-input multi-output (MIMO) relies on accurate downlink channel state information (CSI) at the transmitter (CSIT).
no code implementations • 13 Jan 2023 • Chengzhong Tian, Yijie Mao, Kangchun Zhao, Yuanming Shi, Bruno Clerckx
Numerical results show that by marrying the benefits of RSMA and RIS, the proposed RIS empowered RSMA achieves a better tradeoff between the WSR of IRs and energy harvested at ERs.
no code implementations • 9 Jan 2023 • Bowen Wang, Hongyu Li, Shanpu Shen, Ziyang Cheng, Bruno Clerckx
This work focuses on the use of reconfigurable intelligent surface (RIS) in dual-function radar-communication (DFRC) systems to improve communication capacity and sensing precision, and enhance coverage for both functions.
no code implementations • 9 Jan 2023 • Hongyu Li, Shanpu Shen, Matteo Nerini, Bruno Clerckx
Reconfigurable intelligent surface (RIS) has been envisioned as a promising technique to enable and enhance future wireless communications due to its potential to engineer the wireless channels in a cost-effective manner.
no code implementations • 19 Oct 2022 • Ziang Liu, Sundar Aditya, Hongyu Li, Bruno Clerckx
Integrated sensing and communication (ISAC) has been envisioned as a solution to realize the sensing capability required for emerging applications in wireless networks, while efficiently utilizing the available spectral, hardware and energy resources.
no code implementations • 5 Oct 2022 • Hongyu Li, Shanpu Shen, Bruno Clerckx
Beyond diagonal reconfigurable intelligent surface (BD-RIS) is a novel branch of RIS which breaks through the limitation of traditional RIS with diagonal scattering matrices.
no code implementations • 15 Sep 2022 • Matteo Nerini, Bruno Clerckx
In this letter, we address blockage detection and precoder design for multiple-input multiple-output (MIMO) links, without communication overhead required.
no code implementations • 1 Sep 2022 • Hongyu Li, Shanpu Shen, Bruno Clerckx
With the proposed model, we first derive the scaling law of the received signal power for a multi-sector BD-RIS-assisted single-user system.
no code implementations • 13 Jul 2022 • Valentina Rizzello, Matteo Nerini, Michael Joham, Bruno Clerckx, Wolfgang Utschick
In this work, we propose an efficient method for channel state information (CSI) adaptive quantization and feedback in frequency division duplexing (FDD) systems.
no code implementations • 4 May 2022 • Hongyu Li, Yijie Mao, Onur Dizdar, Bruno Clerckx
This letter is the third part of a three-part tutorial that focuses on rate-splitting multiple access (RSMA) for 6G.
no code implementations • 2 May 2022 • Rafael Cerna Loli, Onur Dizdar, Bruno Clerckx, Cong Ling
Effective and adaptive interference management is required in next generation wireless communication systems.
no code implementations • 2 Apr 2022 • Yumeng Zhang, Bruno Clerckx
Current research has optimized transmit waveform, adaptive to channel state information (CSI), to maximize the harvested power in WPT while accounting for energy harvester (EH)'s non-linearity.
no code implementations • 25 Jan 2022 • Rafael Cerna Loli, Onur Dizdar, Bruno Clerckx
To achieve this, the proposed DFRC marries the capabilities of a Multiple-Input Multiple-Output (MIMO) radar with Rate-Splitting Multiple Access (RSMA).
no code implementations • 19 Jan 2022 • Anup Mishra, Yijie Mao, Luca Sanguinetti, Bruno Clerckx
This letter focuses on integrating rate-splitting multiple-access (RSMA) with time-division-duplex Cell-free Massive MIMO (multiple-input multiple-output) for massive machine-type communications.
no code implementations • 28 Nov 2021 • Yumeng Zhang, Bruno Clerckx
Waveform optimization has recently been shown to be a key technique to boost the efficiency and range of far-field wireless power transfer (WPT).
no code implementations • 7 Jun 2021 • Shanpu Shen, JungHoon Kim, Bruno Clerckx
The transmitter sweeps through the codebook and then the receiver feeds back the index of the optimal codeword, so that the waveform and beamforming can be adapted to the multipath fading channel to maximize the output dc power without requiring explicit channel estimation and the knowledge of accurate Channel State Information.
no code implementations • 3 May 2021 • Rafael Cerna-Loli, Onur Dizdar, Bruno Clerckx
In order to manage the increasing interference between radar and communication systems, joint radar and communication (RadCom) systems have attracted increased attention in recent years, with the studies so far considering the assumption of perfect Channel State Information at the Transmitter (CSIT).
no code implementations • 16 Apr 2021 • Onur Dizdar, Aryan Kaushik, Bruno Clerckx, Christos Masouros
In this paper, we introduce the design of a multi-antenna Joint Radar-Communication (JRC) system with Rate Splitting Multiple Access (RSMA) and low resolution Digital-to-Analog Converter (DAC) units.
no code implementations • 14 Mar 2021 • Chengcheng Xu, Bruno Clerckx, Shiwa Chen, Yijie Mao, Jianyun Zhang
In this work, we propose a powerful and unified multi-antenna DFRC transmission framework, where an additional radar sequence is transmitted apart from communication streams to enhance radar beampattern matching capability, and Rate-Splitting Multiple Access (RSMA) is adopted to better manage the interference.
no code implementations • 11 Feb 2021 • Zhi Wen Si, Longfei Yin, Bruno Clerckx
In this paper, we formulate the MMF problem subject to per-antenna power constraints at the satellite for the system with imperfect channel state information at the transmitter (CSIT).
Fairness
Information Theory
Signal Processing
Information Theory
no code implementations • 28 Jan 2021 • Chengcheng Xu, Bruno Clerckx, Jianyun Zhang
The tradeoffs between WSR and probing power at target are compared among both proposed transmissions and two practically simpler dual-function implementations i. e., time division and frequency division.
no code implementations • 7 Jan 2021 • Zhenyuan Feng, Bruno Clerckx, Yang Zhao
This paper highlights the fact that IRS can provide an extra passive beamforming gain on output DC power over conventional WPT designs and significantly influence the waveform design by leveraging the benefit of passive beamforming, frequency diversity and energy harvester nonlinearity.
Information Theory Signal Processing Information Theory
1 code implementation • 10 Dec 2020 • Yang Zhao, Bruno Clerckx, Zhenyuan Feng
To facilitate practical implementation, we also propose a low-complexity design based on closed-form adaptive waveform schemes.
Information Theory Signal Processing Information Theory
no code implementations • 23 Nov 2020 • Shanpu Shen, Bruno Clerckx, Ross Murch
Compared with the single connected reconfigurable impedance network, our group and fully connected reconfigurable impedance network can increase the received signal power by up to 62%, or maintain the same received signal power with a number of RIS elements reduced by up to 21%.
no code implementations • 31 Oct 2020 • Shanpu Shen, JungHoon Kim, Chaoyun Song, Bruno Clerckx
The measurements show that WPT DAS can boost the output dc power by up to 30 dB in single-user case and boost the sum of output dc power by up to 21. 8 dB in two-user case and broaden the service coverage area in a low cost, low complexity, and flexible manner.
no code implementations • 4 Oct 2020 • JungHoon Kim, Bruno Clerckx
Far-field Wireless Power Transfer (WPT) has emerged as a potential power source for the Internet of Things (IoT) and Wireless Sensor Network (WSN). The expansion of the power transfer range is one of the key challenges to make the technology viable.
Information Theory Information Theory
no code implementations • 13 Sep 2020 • Shanpu Shen, Bruno Clerckx
We also analytically derive the scaling laws of the output DC power as a function of the number of transmit and receive antennas.
no code implementations • 13 Sep 2020 • Shanpu Shen, Bruno Clerckx
We also consider a practical RF combining circuit using phase shifter and RF power combiner and optimize the waveform, transmit beamforming, and analog receive beamforming adaptive to the CSI.
no code implementations • 12 Aug 2020 • Longfei Yin, Bruno Clerckx
In this work, we characterize the MMF Degrees-of-Freedom (DoF) achieved by RS and NoRS in multigroup multicast with imperfect CSIT and demonstrate the benefits of RS strategies for both underloaded and overloaded scenarios.
no code implementations • 3 Jun 2020 • Ping Li, Ming Chen, Yijie Mao, Zhaohui Yang, Bruno Clerckx, Mohammad Shikh-Bahaei
In this paper, we employ Cooperative Rate-Splitting (CRS) technique to enhance the Secrecy Sum Rate (SSR) for the Multiple Input Single Output (MISO) Broadcast Channel (BC), consisting of two legitimate users and one eavesdropper, with perfect Channel State Information (CSI) available at all nodes.
no code implementations • 17 Oct 2019 • Yijie Mao, Bruno Clerckx, Jian Zhang, Victor O. K. Li, Mohammed Arafah
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.
no code implementations • 14 Sep 2019 • Morteza Varasteh, Jakob Hoydis, Bruno Clerckx
Relying on the proposed model, the learning problem of modulation design for Simultaneous Wireless Information-Power Transmission (SWIPT) over a point-to-point link is studied.
Information Theory Signal Processing Information Theory