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SUMMARY:Energy-efficient wireless communications - Dr. Fernando Rosas\, Wi
 reless Technologies Laboratory\, Pontificia Universidad Católica de Chile
DTSTART:20130620T103000Z
DTEND:20130620T113000Z
UID:TALK45742@talks.cam.ac.uk
CONTACT:Prof. Ramji Venkataramanan
DESCRIPTION:Abstract: One of the main objectives in the communications fie
 ld is to increase the achievable bit-rates. A different paradigm is presen
 ted by energy-efficient communications\, where the goal is to send a fixed
  amount of information expending the less possible amount of energy. We ha
 ve developed a model for the energy consumption of communications over SIS
 O and MIMO links. Our model is the first to systematically include the eff
 ects of the randomness of wireless channels. Using this model\, we have fo
 und that there exists a deep link between energy-efficiency and the multip
 lexing-diversity trade-off. In effect\, when the transmission distance is 
 large then schemes with large diversity gain are the best choice. On the c
 ontrary\, schemes with large multiplexing gain are optimal for communicati
 ng over short link distances. In the talk we show how this general princip
 le rules the optimization of the irradiation power\, modulation size\, cod
 e-rate and MIMO modulation scheme.
LOCATION:SigProC seminar room (3rd floor of Dept. of Engineering)
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