239 citations · 551 across the 25 of their papers we have counts for
5 papers · 1 filter
Joint Downlink-Uplink Channel Estimation for Non-Reciprocal RIS-Assisted Communications
Paulo R. B. Gomes, Amarilton L. Magalhães, André L. F. de Almeida
Reconfigurable intelligent surface (RIS) is a recent low-cost and energy-efficient technology with potential applicability for future wireless communications. Performance gains ach…
Tensor-Based Receivers for the Bistatic Sensing and Communication Scenario
Walter da C. Freitas, Gerard Favier, Andre L. F. de Almeida
We propose receivers for bistatic sensing and communication that exploit a tensor modeling of the received signals. We consider a hybrid scenario where the sensing link knows the t…
A Decoupled Channel Estimation Method for Beyond Diagonal RIS
Bruno Sokal, Fazal-E-Asim, André L. F. de Almeida +2
Beyond diagonal reconfigurable intelligent surface (BD-RIS) is a new architecture for RIS where elements are interconnected to provide more wave manipulation flexibility than tradi…
Semi-Blind Receivers for Hybrid Reflecting and Sensing RIS
Amarilton L. Magalhães, André L. F. de Almeida
Recent research has delved into advanced designs for reconfigurable intelligent surfaces (RIS) with integrated sensing functions. One promising concept is the hybrid RIS (HRIS), wh…
Efficient numerical frameworks for modelling ultrasonic beams propagating across interfaces
André Lello de Almeida, Melody Png, Bo Lan
Two different frameworks are developed to model the wave field generated by a transducer and propagating through one or more interfaces, and a Quasi-Monte Carlo (QMC) integration s…