Search Results for author: R. C. de Lamare

Found 26 papers, 0 papers with code

Study of Enhanced MISC-Based Sparse Arrays with High uDOFs and Low Mutual Coupling

no code implementations16 Sep 2023 X. Sheng, D. Lu, Y. Li, R. C. de Lamare

In this letter, inspired by the maximum inter-element spacing (IES) constraint (MISC) criterion, an enhanced MISC-based (EMISC) sparse array (SA) with high uniform degrees-of-freedom (uDOFs) and low mutual-coupling (MC) is proposed, analyzed and discussed in detail.

Efficient Covariance Matrix Reconstruction with Iterative Spatial Spectrum Sampling

no code implementations2 Sep 2023 S. Mohammadzadeh, V. H. Nascimento, R. C. de Lamare, O. Kukrer

This work presents a cost-effective technique for designing robust adaptive beamforming algorithms based on efficient covariance matrix reconstruction with iterative spatial power spectrum (CMR-ISPS).

Study of Robust Adaptive Beamforming with Covariance Matrix Reconstruction Based on Power Spectral Estimation and Uncertainty Region

no code implementations18 Mar 2023 S. Mohammadzadeh, V. H. Nascimento, R. C. de Lamare, O. Kukrer

In this work, a simple and effective robust adaptive beamforming technique is proposed for uniform linear arrays, which is based on the power spectral estimation and uncertainty region (PSEUR) of the interference plus noise (IPN) components.

Study of Novel Sparse Array Design Based on the Maximum Inter-Element Spacing Criterion

no code implementations20 Aug 2022 W. Shi, Y. Li, R. C. de Lamare

A novel sparse array (SA) structure is proposed based on the maximum inter-element spacing (IES) constraint (MISC) criterion.

Study of Robust Sparsity-Aware RLS algorithms with Jointly-Optimized Parameters for Impulsive Noise Environments

no code implementations9 Apr 2022 Y. Yu, L. Lu, Y. Zakharov, R. C. de Lamare, B. Chen

This paper proposes a unified sparsity-aware robust recursive least-squares RLS (S-RRLS) algorithm for the identification of sparse systems under impulsive noise.

2D Human Pose Estimation

Study of filtered-x logarithmic recursive least $p$-power algorithm

no code implementations20 Jan 2022 Z. Zheng, L. Lu, Y. Yu, R. C. de Lamare, Z. Liu

For active impulsive noise control, a filtered-x recursive least $p$-power (FxRLP) algorithm is proposed by minimizing the weighted summation of the $p$-power of the \emph{a posteriori} errors.

Study of List-Based OMP and an Enhanced Model for Direction Finding with Non-Uniform Arrays

no code implementations8 May 2021 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 Pursuit (LBML-OMP) for direction-of-arrival estimation with non-uniform linear arrays (NLAs).

Direction of Arrival Estimation

Robust Adaptive Filtering Based on Exponential Functional Link Network

no code implementations5 Feb 2021 T. Yu, W. Li, Y. Yu, R. C. de Lamare

The exponential functional link network (EFLN) has been recently investigated and applied to nonlinear filtering.

Energy-Efficient Distributed Learning Algorithms for Coarsely Quantized Signals

no code implementations13 Jan 2021 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.

Quantization

Low-Cost Maximum Entropy Covariance Matrix Reconstruction Algorithm for Robust Adaptive Beamforming

no code implementations28 Dec 2020 S. Mohammadzadeh, V. H. Nascimento, R. C. de Lamare

In this letter, we present a novel low-complexity adaptive beamforming technique using a stochastic gradient algorithm to avoid matrix inversions.

Study of Energy-Efficient Distributed RLS-based Learning with Coarsely Quantized Signals

no code implementations20 Dec 2020 A. Danaee, R. C. de Lamare, V. H. Nascimento

In this work, we present an energy-efficient distributed learning framework using coarsely quantized signals for Internet of Things (IoT) networks.

Quantization

Study of Diffusion Normalized Least Mean M-estimate Algorithms

no code implementations20 Apr 2020 Y. Yu, H. He, T. Yang, X. Wang, R. C. de Lamare

This work proposes diffusion normalized least mean M-estimate algorithm based on the modified Huber function, which can equip distributed networks with robust learning capability in the presence of impulsive interference.

Study of Robust Two-Stage Reduced-Dimension Sparsity-Aware STAP with Coprime Arrays

no code implementations23 Dec 2019 X. Wang, Z. Yang, J. Huang, R. C. de Lamare

Simulation results show that the proposed algorithm is robust to prior knowledge errors and can provide good clutter suppression performance in low sample support.

Study of Distributed Robust Beamforming with Low-Rank and Cross-Correlation Techniques

no code implementations27 Nov 2019 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.

Compressed Sensing with Probability-based Prior Information

no code implementations27 Oct 2019 Q. Jiang, S. Li, Z. Zhu, H. Bai, X. He, R. C. de Lamare

This paper deals with the design of a sensing matrix along with a sparse recovery algorithm by utilizing the probability-based prior information for compressed sensing system.

Robust DCD-Based Recursive Adaptive Algorithms

no code implementations18 Aug 2019 Y. Yu, L. Lu, Z. Zheng, W. Wang, Y. Zakharov, R. C. de Lamare

The dichotomous coordinate descent (DCD) algorithm has been successfully used for significant reduction in the complexity of recursive least squares (RLS) algorithms.

Study of Robust Distributed Diffusion RLS Algorithms with Side Information for Adaptive Networks

no code implementations4 Feb 2019 Y. Yu, H. Zhao, R. C. de Lamare, Y. Zakharov, L. Lu

This work develops robust diffusion recursive least squares algorithms to mitigate the performance degradation often experienced in networks of agents in the presence of impulsive noise.

Study of Robust Diffusion Recursive Least Squares Algorithms with Side Information for Networked Agents

no code implementations24 Dec 2018 Y. Yu, R. C. de Lamare, Y. Zakharov

This work develops a robust diffusion recursive least squares algorithm to mitigate the performance degradation often experienced in networks of agents in the presence of impulsive noise.

Direction Finding Based on Multi-Step Knowledge-Aided Iterative Conjugate Gradient Algorithms

no code implementations16 Dec 2018 S. Pinto, R. C. de Lamare

In this work, we present direction-of-arrival (DoA) estimation algorithms based on the Krylov subspace that effectively exploit prior knowledge of the signals that impinge on a sensor array.

Study of Sparsity-Aware Subband Adaptive Filtering Algorithms with Adjustable Penalties

no code implementations16 Oct 2018 Y. Yu, H. Zhao, R. C. de Lamare

We propose two sparsity-aware normalized subband adaptive filter (NSAF) algorithms by using the gradient descent method to minimize a combination of the original NSAF cost function and the l1-norm penalty function on the filter coefficients.

Study of Set-Membership Adaptive Kernel Algorithms

no code implementations15 Aug 2018 A. Flores, R. C. de Lamare

In the last decade, a considerable research effort has been devoted to developing adaptive algorithms based on kernel functions.

Time Series Time Series Analysis

Multi-Step Knowledge-Aided Iterative ESPRIT for Direction Finding

no code implementations1 May 2018 S. F. B. Pinto, R. C. de Lamare

An analysis of the MSE of the reshaped data covariance matrix is carried out along with comparisons between computational complexities of the proposed and existing algorithms.

Study of Robust Distributed Beamforming Based on Cross-Correlation and Subspace Projection Techniques

no code implementations1 Dec 2017 H. Ruan, R. C. de Lamare

In this work, we present a novel robust distributed beamforming (RDB) approach to mitigate the effects of channel errors on wireless networks equipped with relays based on the exploitation of the cross-correlation between the received data from the relays at the destination and the system output.

Signal Processing Information Theory Information Theory

Study of Set-Membership Kernel Adaptive Algorithms and Applications

no code implementations27 Aug 2017 R. C. de Lamare, André Flores

Adaptive algorithms based on kernel structures have been a topic of significant research over the past few years.

Distributed Low-Rank Estimation Based on Joint Iterative Optimization in Wireless Sensor Networks

no code implementations5 Nov 2014 S. Xu, R. C. de Lamare, H. V. Poor

This paper proposes a novel distributed reduced--rank scheme and an adaptive algorithm for distributed estimation in wireless sensor networks.

Dimensionality Reduction

Dynamic Topology Adaptation and Distributed Estimation for Smart Grids

no code implementations14 Jan 2014 S. Xu, R. C. de Lamare, H. V. Poor

This paper presents new dynamic topology adaptation strategies for distributed estimation in smart grids systems.

Cannot find the paper you are looking for? You can Submit a new open access paper.