Guy Grunfelder

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Wireless Sensor Networks (WSN) have recently gained a great attention in several applications such as environmental monitoring and target tracking. Applying this technology to shipboard monitoring systems may be a costeffective solution to reduce the cost of wires installation and maintenance. However, wireless communications on board ships may be severely(More)
The objective of this Letter is to characterise the electromagnetic wave propagation between adjacent rooms in lower deck areas of ships. A wideband MIMO (Multiple-Input Multiple-Output) channel sounder has been used to realize double directional propagation measurements at 2.2 GHz. The antenna configuration was a linear array at the transmission side and a(More)
The use of antenna arrays at emission and reception seems to represent a prominent solution for future wireless systems, it improves data rates and enhances the quality of service. The performance of these systems depends mainly on the propagation channel. Therefore, channel’s characterization and modeling are crucial. In this document, we present a MIMO(More)
A 60 GHz wireless Gigabit Ethernet (G.E.) communication system capable of near gigabit data rate has been developed at IETR. The realized system covers 2 GHz available bandwidth. This paper describes the design and realization of the overall system including the baseband (BB), intermediate frequency (IF) and radiofrequency (RF) blocks. A differential binary(More)
Wireless Sensor Networks (WSNs) have gained worldwide attention in recent years, particularly with the proliferation of Micro‐Electro‐Mechanical Systems (MEMS) technology which has facilitated the development of smart sensors. Smart sensors are small devices composed of one or more sensors, a memory, a processor, a power supply and a radio unit. They can(More)
Wireless Sensor Networks (WSN) may be a very useful technology for monitoring systems in hostile environments. Few works have treated the use of this technology in the particular metallic shipboard environment. This paper reports on the deployment of a WSN on board a ferry-type boat during realistic conditions. The network was tested during sailings and(More)
International Symposium on Wireless Personal Multimedia Communication (WPMC 2011) in Brest, France. Abstract: Current shipboard monitoring systems use extensive lengths of cables to connect sensors to control units. Replacing wired connections by wireless ones may be an efficient solution to reduce the ship weight and cost. Ships are characterized by a(More)
A 60 GHz wireless Gigabit Ethernet (G.E.) communication system is developed at IETR. As the 60 GHz radio link operates only in a single-room configuration, an additional Radio over Fibre (RoF) link is used to ensure the communications in all the rooms of a residential environment. The realized system covers 2 GHz bandwidth. Due to the hardware constraints,(More)