Sébastien Roy
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View article: A Compact Carrier-Based IR-UWB Transmitter in 28 nm CMOS for On-Cortex Neural Implants
A Compact Carrier-Based IR-UWB Transmitter in 28 nm CMOS for On-Cortex Neural Implants Open
View article: An Ultra Compact and Fully-Integrated Tunable IR-UWB Transmitter in 28 nm CMOS for High-Density Neural Implants
An Ultra Compact and Fully-Integrated Tunable IR-UWB Transmitter in 28 nm CMOS for High-Density Neural Implants Open
View article: Empowering Engineering Students: A Targeted Strategy to Strengthen Mathematical Foundations Through Adaptive Learning Tools
Empowering Engineering Students: A Targeted Strategy to Strengthen Mathematical Foundations Through Adaptive Learning Tools Open
The Canadian Engineering Accreditation Board (CEAB) requires mathematical competency for engineers. Assessments at Université de Sherbrooke revealed significant gaps in students’ mathematical prior knowledge, necessitating enhanced prepara…
View article: Ultra-Compact Tunable IR-UWB Transmitter in 28 nm CMOS for Neural Implants with IEEE 802.15.6 Compliance
Ultra-Compact Tunable IR-UWB Transmitter in 28 nm CMOS for Neural Implants with IEEE 802.15.6 Compliance Open
View article: Scalable 49-Channel Neural Recorder with an Event-Driven Ramp ADC and PCA Compression in 28 nm CMOS
Scalable 49-Channel Neural Recorder with an Event-Driven Ramp ADC and PCA Compression in 28 nm CMOS Open
Neural interfaces advance neuroscience research and therapeutic innovations by accurately measuring neuronal activity. However, recording raw data from numerous neurons results in substantial amount of data and poses challenges for wireles…
View article: Energy, Scalability, Data and Security in Massive IoT: Current Landscape and Future Directions
Energy, Scalability, Data and Security in Massive IoT: Current Landscape and Future Directions Open
The Massive Internet of Things (MIoT) envisions an interconnected ecosystem of billions of devices, fundamentally transforming diverse sectors such as healthcare, smart cities, transportation, agriculture, and energy management. However, t…
View article: Design and Implementation of a Low-Power Biopotential Amplifier in 28 nm CMOS Technology with a Compact Die-Area of 2500 μm2 and an Ultra-High Input Impedance
Design and Implementation of a Low-Power Biopotential Amplifier in 28 nm CMOS Technology with a Compact Die-Area of 2500 μm2 and an Ultra-High Input Impedance Open
Neural signal recording demands compact, low-power, high-performance amplifiers, to enable large-scale, multi-channel electrode arrays. This work presents a bioamplifier optimized for action potential detection, designed using TSMC 28 nm H…
View article: From Virtual Reality to Reality Check 
From Virtual Reality to Reality Check Open
View article: Feasibility Assessment of an Optically Powered Digital Retinal Prosthesis Architecture for Retinal Ganglion Cell Stimulation
Feasibility Assessment of an Optically Powered Digital Retinal Prosthesis Architecture for Retinal Ganglion Cell Stimulation Open
Clinical trials previously demonstrated the notable capacity to elicit visual percepts in blind patients affected with retinal diseases by electrically stimulating the remaining neurons on the retina. However, these implants restored very …
View article: Data Freshness and End-to-End Delay in Cross-Layer Two-Tier Linear IoT Networks
Data Freshness and End-to-End Delay in Cross-Layer Two-Tier Linear IoT Networks Open
The operational and technological structures of radio access networks have undergone tremendous changes in recent years. A displacement of priority from capacity–coverage optimization (to ensure data freshness) has emerged. Multiple radio …
View article: Uplink SINR and Rate Analysis in Massive MIMO Systems with Two-Layer Linear Receiver
Uplink SINR and Rate Analysis in Massive MIMO Systems with Two-Layer Linear Receiver Open
In a previous work, a two-layer linear receiver was proposed as a low-complexity scheme that can achieve a good trade-off between performance and complexity in a massive multiple-input multiple-output (MIMO) context. For this scheme, the a…
View article: Experimental Comparison of PAM and CAP Modulation for Visible Light Communication Under Illumination Constraints
Experimental Comparison of PAM and CAP Modulation for Visible Light Communication Under Illumination Constraints Open
International audience
View article: Multi-Layered Energy Efficiency in LoRa-WAN Networks: A Tutorial
Multi-Layered Energy Efficiency in LoRa-WAN Networks: A Tutorial Open
Emerging Internet-of-Things (IoT) applications are driving increasing demand for advanced services in wireless networks, prompting the development of new technologies to address the associated challenges. Energy efficiency of IoT standards…
View article: Empirical Rainfall Thresholds for Landslide Occurrence in Serra do Mar, Angra dos Reis, Brazil
Empirical Rainfall Thresholds for Landslide Occurrence in Serra do Mar, Angra dos Reis, Brazil Open
In the tropical environment such as Brazil, the frequency of rainfall-induced landslides is particularly high because of the rugged terrain, heavy rainfall, increasing urbanization, and the orographic effect of mountain ranges. Since such …
View article: CCDC 2062442: Experimental Crystal Structure Determination
CCDC 2062442: Experimental Crystal Structure Determination Open
View article: CCDC 2062441: Experimental Crystal Structure Determination
CCDC 2062441: Experimental Crystal Structure Determination Open
View article: Direct Carbon Isotope Exchange of Pharmaceuticals via Reversible Decyanation
Direct Carbon Isotope Exchange of Pharmaceuticals via Reversible Decyanation Open
The incorporation of carbon-14 allows tracking of organic molecules and provides vital knowledge on their fate. This information is critical in pharmaceutical development, crop science and human food safety evaluation. Herein, a transition…
View article: Feasibility Assessment of an Optically Powered Digital Retinal Prosthesis Architecture for Retinal Ganglion Cell Stimulation
Feasibility Assessment of an Optically Powered Digital Retinal Prosthesis Architecture for Retinal Ganglion Cell Stimulation Open
Clinical trials previously demonstrated the notable capacity to elicit visual percepts in blind patients affected with retinal diseases by electrically stimulating the remaining neurons on the retina. However, these implants restored very …
View article: Uplink Performance Analysis for Massive MIMO Linear Processing
Uplink Performance Analysis for Massive MIMO Linear Processing Open
This paper considers an uplink massive MIMO system, in which the base station (BS) is equipped with a very large antenna array to serve multiple users simultaneously in the presence of out-of-cell interferers. Multi-cell minimum mean-squar…
View article: Space-Frequency Block Code for MIMO-OFDM Communication Systems with\n Reconfigurable Antennas
Space-Frequency Block Code for MIMO-OFDM Communication Systems with\n Reconfigurable Antennas Open
We propose a space-frequency (SF) block coding scheme for a multiple-input\nmultiple-output (MIMO) orthogonal frequency-division multiplexing (OFDM) system\nusing antennas with reconfigurable radiation patterns. In this system, each\neleme…