AXIS 4 – Communication systems and microwave applications

AXIS 4  – Communication systems and microwave applications

The mains research activities of IEMN in that wide field are organised in 4 topics :

1.       Smart objects communication, sensors networks and high data rate 60 GHz WLAN / WPAN

This multidisciplinary project is developed in close collaboration with the laboratory of fundamental computing science of LILLE (LIFL) within the research federation IRCICA. IEMN is in charge of the physical and MAC layers while LIFL develops the communication middlewares and routing algorithms.

IEMN is mainly interested in 60 GHz indoor communication systems using either wireless or radio over fiber  (RoF) techniques to deploy mobile ad hoc or mixed networks. This study involves :

§   Sounding and modelling of the 60 GHz radio channel and optimisation of the share of radio ressources

§   Development of miniaturised ultra low power 60 GHz radio modules for sensors networks nodes using IR-UWB technique and BiCMOS technology (ST-M)

§   Development of high data rate (> 7 Gb/s) 60 GHz WLAN / WPAN using complex vectorial modulation schemes and frequency multiplexing

§   Development of wafer level packaging and heterogeneous integration technologies for the realisation of SIP (System In Package) including MEMS based agile antenna arrays, radio modules and embedded sensing and intelligence

§   Energy harvesting and scavenging

2.       Telecommunication and localisation for transportation systems

This activity is mainly devoted to terrestrial transportation systems (automotive and railway environment). It includes :

§   Studies on the coupling phenomena between automotive connectors and bundles of cables based on electromagnetic modelling and experiments in an improved reverberating chamber

§   Characterisation of the electromagnetic environment on board trains and study of electromagnetic perturbations induced by a railway sub-station

§   Powerline communication on board vehicles. This study focuses on channel characterisation and modelling in order to provide adequate channel coding to overcome for example the problem of impulsive noise

§   MIMO communication in tunnels based on the concept of modal diversity to improve the ergodic capacity of the channel and on the development of a new testbed for simulating multipath environment and testing MIMO systems

§   Localisation and distance measurements based either on spread spectrum techniques or UWB techniques (AOA, TOA, TDOA).

3.       Digital circuits and communications systems

§   The development of specific digital signal processing techniques to improve the performance of DMT and OFDM multi- carriers transmissions

§   The design and realisation of ultra wide band (DC – 20 GHz) high resolution (>8 Enobs) and wide dynamic (>60 db) digitizers for the digital processing of complex signals

§   The development of software radio RF interface for mobile terminals exploiting advanced CMOS processes, BAW filters and SIP/SoC integration technologies (collaboration ST-M)

§   Multi standards radio over fiber communications using acousto-optic devices for UWB signal propagation with optical CDMA multiple access and configurable WDM

 

4.       Microwave and millimeter wave Non Destructive Characterisation

§   Mm.wave and sub-mm wave passive imaging systems using synthetic aperture antennas

§   Non destructive characterisation up to mm. wave, in particular passive radiometers and near field scanning microwave microscopes for biological applications and industrial processes control.