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This paper presents a contact-less heartbeat detection system and a cardiopulmonary modeling. Using a vector network analyzer, our proposed microwave system shows the ability of detecting the heartbeat signal at different frequencies, as... more
This paper presents a contact-less heartbeat detection system and a cardiopulmonary modeling. Using a vector network analyzer, our proposed microwave system shows the ability of detecting the heartbeat signal at different frequencies, as well as at different output power levels. Based on parameters extracted from real measurements, a model representing the heartbeat and the respiration signals is presented. Different processing techniques are used in order to separate the heartbeat and the respiration signals. For different signal to noise ratios, wavelet filters show higher accuracy over classic filters in determining both the heartbeat rate and the heart rate variability.
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Research Interests: Engineering, Modeling, FDTD, Electromagnetic Waves, IEEE, and 2 moreRay Tracing and Propagation(Ray Tracing and Propagation)
(Ray Tracing and Propagation)
Research Interests: Computer Science, Millimeter Waves, Parameter estimation, Communication System, Electromagnetic Waves, and 10 moreWireless Network, Home Networks, Wlan, Radio Propagation, Wireless Lan, Human Activity, Channel Sounding, Indoor Radio Propagation, Home Network, and Electrical And Electronic Engineering
This paper presents a system for touch-less heartbeat detection and a cardiopulmonary signal modeling approach. Using a vector network analyzer, a microwave system is tested for the detection of the heartbeat signal at a distance of 1 m... more
This paper presents a system for touch-less heartbeat detection and a cardiopulmonary signal modeling approach. Using a vector network analyzer, a microwave system is tested for the detection of the heartbeat signal at a distance of 1 m from a person. The proposed system shows the ability of detecting the heartbeat signals with the possibility of tuning both frequency and power. Measurements are performed at 2.4, 5.8, 10, 16, and 60 GHz, as well as at different power levels between 0 and -27 dBm. Based on measurements performed for both respiration and heart beatings, a model of the measured signals representing the cardiopulmonary activity is presented. The heartbeat rate and the heart rate variability are extracted from the modeling signal using wavelet and classic filters, for SNR between 0 and -20 dB.
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Research Interests: Engineering, Modeling, FDTD, Electromagnetic Waves, IEEE, and 2 moreRay Tracing and Propagation(Ray Tracing and Propagation)
(Ray Tracing and Propagation)
This paper presents the study and the realization at IETR of a high data rate 60 GHz wireless communications system. The system uses a simple single carrier architecture. The receiver architecture is based on a differential demodulation... more
This paper presents the study and the realization at IETR of a high data rate 60 GHz wireless communications system. The system uses a simple single carrier architecture. The receiver architecture is based on a differential demodulation which minimizes the intersymbol interference (ISI) effect and a signal processing unit composed of a joint frame and byte synchronization block and a
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This paper presents the study and the realization at IETR of a high data rate 60 GHz wireless communications system. The system uses a simple single carrier architecture. The receiver architecture is based on a differential demodulation... more
This paper presents the study and the realization at IETR of a high data rate 60 GHz wireless communications system. The system uses a simple single carrier architecture. The receiver architecture is based on a differential demodulation which minimizes the intersymbol interference (ISI) effect and a signal processing unit composed of a joint frame and byte synchronization block and a
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Research Interests: Mathematics, Distributed Computing, Millimeter Waves, Millimeter Wave Antennas, Communication System, and 10 moreHuman Body, Broadband Networks, Network Architecture, Human Activity, Channel Sounding, Transient Response, Channel Impulse Response (CIR), Electrical And Electronic Engineering, temporal variation, and Millimeter Wave
A wireless communication system can be tested either in actual conditions or by using a hardware simulator reproducing actual conditions. With a hardware simulator it is possible to freely simulate a desired type of a radio channel. This... more
A wireless communication system can be tested either in actual conditions or by using a hardware simulator reproducing actual conditions. With a hardware simulator it is possible to freely simulate a desired type of a radio channel. This paper presents new frequency domain and time domain architectures for the digital block of a hardware simulator of Multiple-Input Multiple-Output (MIMO) propagation channels. This simulator can be used for Wireless Local Area Net-works (WLAN) 802.11ac applications. It characterizes an indoor scenario using TGn channel models. After the description of the general characteristics of the hardware simulator, the new architectures of the digital block are presented and designed on a Xilinx Virtex-IV Field Programmable Gate Array (FPGA). Their accuracy, occupation on the FPGA and latency are ana-lyzed.
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Research Interests: Computer Science, Computer Architecture, FPGA, Field-Programmable Gate Arrays, MIMO, and 12 moreFrequency-domain analysis, MIMO channel modeling, Field Programmable Gate Array, Indoor Environment, Time Domain, Signal to Noise Ratio, Channel model, Block Design, Time varying, Frequency Domain, Finite Impulse Response (FIR), and Finite Impulse Response Filter
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ABSTRACT Cette étude a pour objectif de caractériser le canal de propagation dans la bande 2,4 GHz à bord d'un bateau, afin de pouvoir appliquer les technologies de communication sans fil aux systèmes embarqués de surveillance et... more
ABSTRACT Cette étude a pour objectif de caractériser le canal de propagation dans la bande 2,4 GHz à bord d'un bateau, afin de pouvoir appliquer les technologies de communication sans fil aux systèmes embarqués de surveillance et d'alarme. Cet article décrit plusieurs campagnes de mesures effectuées aux mois de juillet et d'octobre 2010 à bord de deux ferries. Des mesures ont été effectuées à quai ainsi que pendant les traversées de l’un d’entre eux. Ces mesures ont permis, d’une part, de vérifier la possibilité de communication dans la bande 2,4 GHz, entre les ponts et d’autre part, entre les salles malgré la séparation par des portes étanches fermées. De même, ces campagnes ont permis de calculer l'exposant d'affaiblissement des pertes de puissance par rapport à la distance entre l’émetteur et le récepteur pour différents environnements à bord de ces ferries.
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ABSTRACT A wireless communication system can be tested either in actual conditions or by using a hardware simulator reproducing actual conditions. With a hardware simulator it is possible to freely simulate a desired type of a radio... more
ABSTRACT A wireless communication system can be tested either in actual conditions or by using a hardware simulator reproducing actual conditions. With a hardware simulator it is possible to freely simulate a desired type of a radio channel. This paper presents architectures for the digital block of a hardware simulator of Multiple-Input Multiple-Output (MIMO) propagation channels. This simulator can be used for Long Term Evolution System (LTE) and Wireless Local Area Networks (WLAN) 802.11ac applications, in indoor and outdoor environments. The first architecture is appropriate for shipboard environments, while the second corresponds to outdoor-to-indoor environments and considers the wave propagation penetration within buildings. Measurements campaigns carried out at 2.2 and 3.5 GHz have been conducted to obtain the impulse responses of the channel using a MIMO channel sounder designed at IETR. The measurements are processed with an algorithm extracting the dominant paths. The architectures of the digital block are implemented on a Xilinx Virtex-IV Field Programmable Gate Array (FPGA). After the implementation of the impulse responses, the accuracy, the occupation on the FPGA and the latency of the architectures are analyzed.
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ABSTRACT This paper studies the feasibility of ubiquitous wireless technologies for shipboard monitoring systems. A measurement campaign has been conducted aboard a ferry boat to study the propagation challenges of wireless communication... more
ABSTRACT This paper studies the feasibility of ubiquitous wireless technologies for shipboard monitoring systems. A measurement campaign has been conducted aboard a ferry boat to study the propagation challenges of wireless communication in this harsh environment. Path loss models have been obtained from the measurements results. We have used these results to determine engineering rules concerning the nodes placement and the number of nodes needed to cover the different decks of the ship. Finally, a wireless sensor network based on the IEEE 802.15.4 standard has been tested successfully on board. Sensor nodes have been placed on the four decks and the sink node related to a laptop has been placed in the control room of the ferry. The placement of nodes was based on the results of the propagation study.
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This paper studies the feasibility of deploying a ZigBee-based sensor network aboard ships. The objective is to verify if this network can be a suitable alternative of the actual shipboard wired monitoring system. Therefore, measurements... more
This paper studies the feasibility of deploying a ZigBee-based sensor network aboard ships. The objective is to verify if this network can be a suitable alternative of the actual shipboard wired monitoring system. Therefore, measurements campaigns have been conducted to evaluate the quality of ZigBee point-to-point communications aboard a ferry operating in the sea. Different configurations and environments were studied
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This paper presents measured data and empirical models for 2.4 GHz radio propagation path loss aboard ships. The first experiment was conducted aboard a ferry moored to the port, while the second one was carried out aboard another ferry... more
This paper presents measured data and empirical models for 2.4 GHz radio propagation path loss aboard ships. The first experiment was conducted aboard a ferry moored to the port, while the second one was carried out aboard another ferry during its cruises between Roscoff (France) and Plymouth (UK). Three different shipboard environments, including engine rooms, parking and passengers' decks, were considered for narrow-band measurement campaigns. The results of these measurements prove the feasibility of ubiquitous wireless technologies to replace or reduce the large amount of wires used in shipboard monitoring systems.