Fiche WOW - Bruno PAILLE

Fondé en 1987, STMicroelectronics est aujourd’hui le premier fabricant européen de semi-conducteurs avec plus de 53
000 collaborateurs et est présent dans 36 pays. Nos composants sont au cœur de tous les systèmes électroniques de
télécommunication, informatique, automobile, grand public, cartes à puces… Nous recherchons :
Improved Localization Techniques with Narrowband Communication
Internet of Things (IoT) is a key concept for sensor network devices to
Sense and Collect data from
the surrounding world. Collection of such data has to be shared
through Internet, where it can be
processed and utilized for various innovative applications. Obviously,
this new approach provides
significant benefits to Industrial and Home/Building automation,
Lighting Control, Security and
Monitoring for Health and Wellness as well as Agricultural and
Environmental applications, to name
but a few of the most pervasive ones. This market is expected to
reach $290.0 billions by 2017
Among the different information which can be sensed by wireless
devices, the positioning is of prime
importance. It can open the door to a new range of applications and
services (such as tracking people
and goods in a warehouse, security control and smart communication
Up to know, most of the localization techniques exploiting ZigBee or
WiFi technology were based on
RSSI (Received Signal Strength Intensity) and were offering really
poor performances in indoor
environment due to the influence of multipath fading. Up to now, the
best localization performances
have been obtained with Ultra Wideband Technology which can offer
up to few cms precision thanks
to the 500 MHz bandwidth. However, UWB is severely limited in
power emission, rarely available in
commercial products and sensitive to any inband blocker. There is a
strong interest in developing
alternative localization technique.
In most of the application, only few tens of cm precision is enough to
provide new applications. This
can theoretically be reached with classical ZigBee and Bluetooth
devices thanks to the 80MHz ISM
bandwidth available. To reach such performances, new radio
techniques should be developed
adapted to the property of narrowband systems.
The first step will consist in listing the different approach that can be
exploited to implement the
ranging measurements of narrowband system such as ZigBee or to
improve their performances.
Comparison will be made with solutions proposed in undergoing
development within the Bluetooth
alliance Then, the theoretical limits of the proposed approach will be
evaluated. Afterward,
simulation chains will be developed in order to evaluate the detailed
performance of the localization
techniques. The simulation will be based on precise models of the
transceiver and classical wideband
channel models. If needed, modification of the transceiver will be
considered, keeping the
compatibility with the existing solutions and assuming that these
modifications do not impact its
power consumption and its cost . Lastly, the best solution will be
selected by potentially exploiting
sensor fusion techniques. At the end, the proposed approach will be
demonstrated in real
environment(Due to timing constraint, the demonstration will be
limited to the algorithms and digital
sections - using FPGa board. keeping unchanged the RF section of
the transceiver –reuse of an
existing transceiver-)
Niveau d’étude requis
Compétences requises
Dates et lieu de la
Thèse conjointe entre la société STMicroelectronics et le laboratoire CEA-LETI.
- Bruno PAILLE, [email protected]