154 citations · 1.1k across the 115 of their papers we have counts for
118 papers
Low-Latency LDPC Decoding Based on Consensus and Return Residual Belief Propagation
Allan E. Feitosa, Rodrigo C. de Lamare
We propose two new decoding algorithms for low-density parity-check (LDPC) codes. The Consensus and Return residual belief propagation (C&R-RBP) algorithm reduces the number of ite…
Study of Iterative Detection and Decoding for {Mixed Near- and Far-Field} XL-MIMO Systems
Nayyab Haider, Rodrigo C. de Lamare
Extra-large multiple-input multiple-output (XL-MIMO) systems {serving users across near-field and far-field regions} experience spherical wavefront propagation that provides enhanc…
Shape Adaptive Reconfigurable Holographic Surfaces
Jalal Jalali, Mostafa Darabi, Rodrigo C. de Lamare
The evolution of wireless networks toward sixth-generation (6G) is driving demand for intelligent, flexible, and energy-efficient propagation control. Reconfigurable holographic su…
Gaussian-trigonometric functional link artificial neural network: design and analysis
Jie Wang, Lu Lu, Yi Yu +3
This paper proposes a Gaussian function-based trigonometric functional link artificial neural network (GTFLN) filter for linear-in-the-parameters nonlinear filtering. Compared with…
Study of Multiuser Scheduling Based on User Satisfaction for MU-MIMO Systems
Ahmed M. Nor, Lukas T. N. Landau, E. Veronica Belmega +1
Scheduling in multiuser multiple input multiple output (MU-MIMO) systems is essential for efficient resource allocation and overall performance enhancement. In this work, a multius…
Study of Mixed-Integer Optimization Based on Graph-Based Decomposition for Cell-Free Networks
Julio Cesar Cardoso Tesolin, Rodrigo C. de Lamare
This letter develops a radio access network (RAN) framework for mixed discrete-continuous optimization problems that arise in user-centric cell=free massive multiple-antenna networ…
Study of Graph-Based Search for Energy-Efficient Clustering in Cell-Free Massive MIMO Networks
Julio Cesar Cardoso Tesolin, Rodrigo C. de Lamare
This paper investigates energy-efficient clustering in user-centric cell-free massive MIMO networks, addressing the access point clustering and power allocation problems via a mixe…
Study of Code-Aided Channel Estimation for Metasurface-Based Holographic MIMO Systems
Roberto C. G. Porto, Rodrigo C. de Lamare
This work proposes an iterative code-aided detection, decoding, and channel estimation scheme for metasurface-based holographic MIMO systems employing stacked intelligent metasurfa…
Channel Chart Location Privacy Based on Geo-Indistinguishability
Atsu Kokuvi Angélo Passah, Rodrigo C. de Lamare, Arsenia Chorti
Channel charting enables location-based services (LBSs) without requiring explicit position information by using pseudo-locations from the channel chart. While this property implie…
User Activity Detection with Delay-Calibration for Asynchronous Massive Random Access
Zhichao Shao, Xiaojun Yuan, Rodrigo C. de Lamare +1
This work considers an uplink asynchronous massive random access scenario in which a large number of users asynchronously access a base station equipped with multiple receive anten…
Analysis of Partially-Calibrated Sparse Subarrays for Direction Finding with Extended Degrees of Freedom
W. S. Leite, R. C. de Lamare
This paper investigates the problem of direction-of-arrival (DOA) estimation using multiple partially-calibrated sparse subarrays. In particular, we present the Generalized Coarray…
Study of Clustered Robust Linear Precoding for Cell-Free MU-MIMO Networks
A. Flores, R. de Lamare
Precoding techniques are key to dealing with multiuser interference in the downlink of cell-free (CF) multiple-input multiple-output systems. However, these techniques rely on accu…
Decentralized and Centralized IDD Schemes for Cell-Free Networks
T. Ssettumba, Z. Shao, L. Landau +1
In this paper, we propose iterative interference cancellation schemes with access points selection (APs-Sel) for cell-free massive multiple-input multiple-output (CF-mMIMO) systems…
Study of Robust Direction Finding Based on Joint Sparse Representation
Y. Li, W. Xiao, L. Zhao +4
Standard Direction of Arrival (DOA) estimation methods are typically derived based on the Gaussian noise assumption, making them highly sensitive to outliers. Therefore, in the pre…
Iterative Detection and Decoding Schemes with LLR Refinements in Cell-Free Massive MIMO Networks
T. Ssettumba, Z. Shao, L. Landau +1
In this paper, we propose low-complexity local detectors and log-likelihood ratio (LLR) refinement techniques for a coded cell-free massive multiple input multiple output (CF- mMIM…
Study of Clustering Techniques and Scheduling Algorithms with Fairness for Cell-Free MIMO Networks
S. Mashdour, R. C. de Lamare
In this work, we propose a clustering technique based on information rates for cell-free massive multiple-input multiple-output (MIMO) networks. Unlike existing clustering approach…
Physical Layer Authentication Using Information Reconciliation
Atsu Kokuvi Angélo Passah, Rodrigo C. de Lamare, Arsenia Chorti
User authentication in future wireless communication networks is expected to become more complicated due to their large scale and heterogeneity. Furthermore, the computational comp…
Study of Adaptive Reweighted Sparse Belief Propagation Decoders for Polar Codes
R. M. Oliveira, R. C. de Lamare
In this paper, we present an adaptive reweighted sparse belief propagation (AR-SBP) decoder for polar codes. The AR-SBP technique is inspired by decoders that employ the sum-produc…
Study of Noncoherent Sparse Subarrays for Direction Finding Based on Low-Rank and Sparse Recovery
W. Leite, R. C. de Lamare
This paper investigates the problem of noncoherent direction-of-arrival (DOA) estimation using different sparse subarrays. In particular, we present a Multiple Measurements Vector…
Study of Adaptive LLR-based AP selection for Grant-Free Random Access in Cell-Free Networks
R. Di Renna, R. C. de Lamare
This paper presents an iterative detection and decoding scheme along with an adaptive strategy to improve the selection of access points (APs) in a grant-free uplink cell-free scen…
Tomlinson-Harashima Cluster-Based Precoders for Cell-Free MU-MIMO Networks
A. Flores, R. C. de Lamare, K. V. Mishra
Cell-free (CF) multiple-input multiple-output (MIMO) systems generally employ linear precoding techniques to mitigate the effects of multiuser interference. However, the power loss…
Study of Iterative Detection and Decoding with Log-Likelihood Ratio Based Access Point Selection for Cell-Free Networks
R. B. Di Renna, R. C. de Lamare
This paper proposes an iterative detection and decoding (IDD) scheme and an approach to improve the selection of access points (APs) in uplink cell-free massive multiple-antenna sy…
Sequential Multiuser Scheduling and Power Allocation for Cell-Free Multiple-Antenna Networks
S. Mashdour, A. Schmeink, R. C. de Lamare +1
Resource allocation is a fundamental task in cell-free (CF) massive multi-input multi-output (MIMO) systems, which can effectively improve the network performance. In this paper, w…
Study of Multiuser Multiple-Antenna Wireless Communications Systems Based on Super-Resolution Arrays
S. Pinto, R. C. de Lamare
This work studies multiple-antenna wireless communication systems based on super-resolution arrays (SRAs). We consider the uplink of a multiple-antenna system in which users commun…