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Energy-efficient wireless communications

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If you have a question about this talk, please contact Prof. Ramji Venkataramanan.

Abstract: One of the main objectives in the communications field is to increase the achievable bit-rates. A different paradigm is presented by energy-efficient communications, where the goal is to send a fixed amount of information expending the less possible amount of energy. We have developed a model for the energy consumption of communications over SISO and MIMO links. Our model is the first to systematically include the effects of the randomness of wireless channels. Using this model, we have found that there exists a deep link between energy-efficiency and the multiplexing-diversity trade-off. In effect, when the transmission distance is large then schemes with large diversity gain are the best choice. On the contrary, schemes with large multiplexing gain are optimal for communicating over short link distances. In the talk we show how this general principle rules the optimization of the irradiation power, modulation size, code-rate and MIMO modulation scheme.

This talk is part of the Communications Research Group Seminar series.

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