90 citations · 127 across the 32 of their papers we have counts for
19 papers · 1 filter
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…
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…
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…
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 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 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…
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…
Study of Iterative Detection and Decoding for Large-Scale MIMO Systems with 1-Bit ADCs
Z. Shao, L. Landau, R. de Lamare
We present a novel iterative detection and decoding scheme for the uplink of large-scale multiuser multiple-antenna systems. In order to reduce the receiver's energy consumption an…
Study of Buffer-aided physical-layer network coding with ML and MMSE linear code designs for cooperative DS-CDMA systems
Jiaqi Gu, Rodrigo C. de Lamare, Mario Huemer
In this work, we propose buffer-aided physical-layer network coding (PLNC) techniques for cooperative direct-sequence code-division multiple access systems. In the proposed buffer-…
Widely-Linear Precoding for Large-Scale MIMO with IQI: Algorithms and Performance Analysis
Wence Zhang, Rodrigo C. de Lamare, Cunhua Pan +4
In this paper we study widely-linear precoding techniques to mitigate in-phase/quadrature-phase (IQ) imbalance (IQI) in the downlink of large-scale multiple-input multiple-output (…
Multi-Branch Tomlinson-Harashima Precoding for MU-MIMO Systems: Theory and Algorithms
K. Zu, R. C. de Lamare, M. Haardt
Tomlinson-Harashima precoding (THP) is a nonlinear processing technique employed at the transmit side and is a dual to the successive interference cancelation (SIC) detection at th…