90 citations · 127 across the 32 of their papers we have counts for
32 papers
Iterative Channel Estimation, Detection and Decoding for Multi-Antenna Systems with RIS
Roberto C. G. Porto, Rodrigo C. de Lamare
This work proposes an iterative channel estimation, detection and decoding (ICEDD) scheme for the uplink of multi-user multi-antenna systems assisted by multiple reconfigurable int…
Direction Finding with Sparse Arrays Based on Variable Window Size Spatial Smoothing
Wesley S. Leite, Rodrigo C. de Lamare, Yuriy Zakharov +2
In this work, we introduce a variable window size (VWS) spatial smoothing framework that enhances coarray-based direction of arrival (DOA) estimation for sparse linear arrays. By c…
Robust Precoding for Resilient Cell-Free Networks
Saeed Mashdour, André R. Flores, Rodrigo C. de Lamare
This paper presents a robust precoder design for resilient cell-free massive MIMO (CF-mMIMO) systems that minimizes the weighted sum of desired signal mean square error (MSE) and r…
Study of Iterative Detection, Decoding and Channel Estimation for RIS-Aided MIMO Networks
Roberto C. G. Porto, Rodrigo C. de Lamare
This work proposes an iterative detection, decoding and channel estimation scheme for multiple-antenna systems assisted by multiple reflective intelligent surfaces (RIS). A novel c…
Study of Symbol Error Probability Constrained Precoding with Zero-Crossing Modulation for Wireless Systems with 1-Bit ADCs
D. Melo, L. Landau, R. de Lamare
The next generation of wireless communications systems will employ new frequency bands such as those in the upper midband, millimeter-wave and sub-terahertz frequency bands. The hi…
Enhanced Multiuser CSI-Based Physical Layer Authentication Based on Information Reconciliation
Atsu Kokuvi Angélo Passah, Arsenia Chorti, Rodrigo C. de Lamare
This paper presents a physical layer authentication (PLA) technique using information reconciliation in multiuser communication systems. A cost-effective solution for low-end Inter…
Study of Constrained Precoding with Zero-Crossing Modulation for Channels with 1-Bit Quantization and Oversampling
D. Melo, L. Landau, R. de Lamare
Future wireless communications systems are expected to operate at bands above 100GHz. The high energy consumption of analog-to-digital converters, due to their high resolution repr…
RIS Deployment Optimization with Iterative Detection and Decoding in Multiuser Multiple-Antenna Systems
R. Porto, R. de Lamare
This work investigates a Reconfigurable Intelligent Surface (RIS)-assisted uplink system employing iterative detection and decoding (IDD) techniques. We analyze the impact of tunin…
Channel Estimation for XL-MIMO Systems with Decentralized Baseband Processing: Integrating Local Reconstruction with Global Refinement
Anzheng Tang, Jun-Bo Wang, Yijin Pan +6
In this paper, we investigate the channel estimation problem for extremely large-scale multiple-input multiple-output (XL-MIMO) systems with a hybrid analog-digital architecture, i…
Iterative Detection and Decoding for Clustered Cell-Free Massive MIMO Networks
T. Ssettumba, S. Mashdour, L. Landau +2
In this letter, we propose an iterative soft interference cancellation scheme for intra-cluster (ICL) and out-of-cluster (OCL) interference mitigation in user-centric clustered cel…
Study of Iterative Detection and Decoding for Multiuser Systems and MMSE Refinements with Active or Passive RIS
R. Porto, R. C. de Lamare
An iterative detection and decoding (IDD) scheme is proposed for multiuser multiple-antenna systems assisted by an active or a passive Reconfigurable Intelligent Surface (RIS). The…
Study of Iterative Detection and Decoding for RIS-Aided Multiuser Multi-Antenna Systems
R. Porto, R. C. de Lamare
We present a novel iterative detection and decoding (IDD) scheme for Reconfigurable Intelligent Surface (RIS)-assisted multiuser multiple-antenna systems. The proposed approach int…
Direction of Arrival Estimation with Sparse Subarrays
W. Leite, R. C. de Lamare, Y. Zakharov +2
This paper proposes design techniques for partially-calibrated sparse linear subarrays and algorithms to perform direction-of-arrival (DOA) estimation. First, we introduce array ar…
Iterative Detection and Decoding for Cell-Free Massive Multiuser MIMO with LDPC Codes
T. Ssettumba, R. Di Renna, L. Landau +1
This paper proposes an iterative detection and decoding (IDD) scheme for a cell free massive multiple input multiple output (CF-mMIMO) system. Users send coded data to the access p…
Study of filtered-x logarithmic recursive least -power algorithm
Z. Zheng, L. Lu, Y. Yu +2
For active impulsive noise control, a filtered-x recursive least -power (FxRLP) algorithm is proposed by minimizing the weighted summation of the -power of the \emph{a poster…
A survey on active noise control techniques -- Part I: Linear systems
Lu Lu, Kai-Li Yin, Rodrigo C. de Lamare +4
Active noise control (ANC) is an effective way for reducing the noise level in electroacoustic or electromechanical systems. Since its first introduction in 1936, this approach has…
Study of Robust Adaptive Beamforming Based on Low-Complexity DFT Spatial Sampling
Saeed Mohammadzadeh, Vitor H. Nascimento, Rodrigo C. de Lamare +1
In this paper, a novel and robust algorithm is proposed for adaptive beamforming based on the idea of reconstructing the autocorrelation sequence (ACS) of a random process from a s…
Study of List-Based OMP and an Enhanced Model for Direction Finding with Non-Uniform Arrays
W. S. Leite, R. C. de Lamare
This paper proposes an enhanced coarray transformation model (EDCTM) and a mixed greedy maximum likelihood algorithm called List-Based Maximum Likelihood Orthogonal Matching Pursui…
Study of Design of Rate-Compatible Polar Codes Based on Non-Uniform Channel Polarization
R. M. Oliveira, R. C. de Lamare
We propose a novel scheme for rate-compatible arbitrary-length polar code construction for the additive white Gaussian noise (AWGN) channel. The proposed scheme is based on the con…
Tomlinson-Harashima Precoding with Stream Combiners for MU-MIMO with Rate-Splitting
A. Flores, R. C. de Lamare, B. Clerckx
This paper introduces multiuser multiple-input multiple-output (MU-MIMO) architectures based on non-linear precoding and stream combining techniques using rate-splitting (RS), wher…
Energy-Efficient Distributed Learning Algorithms for Coarsely Quantized Signals
A. Danaee, R. C. de Lamare, V. H. Nascimento
In this work, we present an energy-efficient distributed learning framework using low-resolution ADCs and coarsely quantized signals for Internet of Things (IoT) networks. In parti…
Study of Robust Two-Stage Reduced-Dimension Sparsity-Aware STAP with Coprime Arrays
X. Wang, Z. Yang, J. Huang +1
Space-time adaptive processing (STAP) algorithms with coprime arrays can provide good clutter suppression potential with low cost in airborne radar systems as compared with their u…
Study of Distributed Robust Beamforming with Low-Rank and Cross-Correlation Techniques
H. Ruan, R. C. de Lamare
In this work, we present a novel robust distributed beamforming (RDB) approach based on low-rank and cross-correlation techniques. The proposed RDB approach mitigates the effects o…
Investigation of Channel Estimation Techniques with 1-bit Quantization and Oversampling for Multiple-Antenna Systems
Z. Shao, L. Landau, R. C. de Lamare
Large-scale multiple-antenna systems have been identified as a promising technology for the next generation of wireless systems. However, by scaling up the number of receive antenn…