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ing and complexity theories, statistical physics
and discrete mathematics. This is fundamental
research but it leads to very practical results.
In 2011, our team was honored with several
best paper awards. I also received, withaSwedish
colleague Joakim Jaldén, the Distinguished
AchievementAward fromNewcom++, aEuropean
network of excellence.We actually solved a series
of open problems including the prediction of the
optimal tradeoff between performance and com-
plexity in a broad setting of communications.
One of the objectives is to use a larger part of the
potential transmission of a chip and that will end
up in requiring smaller processors. What size of
processor dowe need for a given communication
speed and a given reliability? Howmuch energy
is required to compute and transmit? Howbig of
a network can a certain computer handle?We are
now much closer to answering those questions
and we can actually build new algorithms that
are, in many ways, optimal. I was also awarded
a prestigious funding (ANR Blanc) for a project
on improvingnetwork interferencemanagement.
Interference, which increases energy consump-
tion, is often studied alone. In this project, wewill
study three parameters: Interference, complexity
and the knowledge of the channel. Makingwire-
less networks cooperate just a little bitmore could
lead to amajor increase in transmission rate. And
then, downloading amovie could take two hours
instead of ten!”.
mobile
communications
RADIOTRANSMISSION  DIGITALCELLULARNETWORKS  WIRELESSDATATRANSMISSION 
RADIOLOCALAREANETWORKS  MOBILITYMANAGEMENT INNETWORKS  LTE-ADVANCED 
COGNITIVERADIO  SOFTWARERADIOPLATFORMS  
You also startedworking recently on
surveillance networks. What is at stake
in this field?
P. E.:
“Surveillance networks of the future
raise several research challenges but also many
concerns. Despite the obvious necessity of these
systems, there is no underlying theory and the
present solutions lack validation and insight.
Our objective is to explore the theoretical limits
of surveillance systems in order to rigorously
produce large surveillance networks that guar-
antee safety but also preserve our privacy. There
are a lot of things to be understood in this field:
How to set up cameras? How to efficiently check
the videos we get? One of the ideas is to use our
experience to go from mobile communications
theory to practice. The way we set up antennas,
for example, couldbe used for settingup cameras
in a more efficient way. Plus, we got interesting
results this year that will be used to develop bet-
ter algorithms to find people on these images.
We were able to quantify the tradeoff between
being quickness and effectiveness. This was a
first in this field and we had the opportunity to
present our work in a major conference. I could
tell you more about it but I think we are being
watched!”.
nationalprojects
SESAME
PLATA
ECOSCells
LICORNE
CORRIDOR
Plate-formeMultimodale(PFMM)
SYMPA
RATCOM
WLBOX
SMART4GTABLET
LTE-NOW
RATCOM
SCOREF
VELCRI
HNPS
SPECTRA
europeanprojects
MEDIEVAL
SACRA
LOLA
NEWCOM++
iTETRIS
WHERE2
CROWN
ARTIST4G
SAPHYRE
SAMURAI
CONECT
@CROPOLIS
SCAMPI
current projects
27
2011annual report