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Energy efficiency is important to wireless and broadcast networks

Dr Peter Bagot and John Boyer

John Boyer and Peter Bagot in the lab University of Bristol

10 May 2017

When a digital TV system operates with excess transmit power there is no benefit for either the user or broadcaster. New research has found that by deploying a spatially adaptive broadcast system, broadcast powers can be reduced by up to 35 per cent, reducing carbon emissions and saving money.

The research by engineers at the University of Bristol, discussed in the paper ‘Spatially adaptive TV broadcast system: hardware in the loop operational analysis’ published in IEEE Transactions on Broadcasting, has shown that the energy efficiency of broadcast TV can be improved if the broadcaster optimises in real-time both the signal strength and directivity of the broadcast transmission.

Dr Peter Bagot, Research Associate in the Department of Electrical and Electronic Engineering, said: "Digital broadcasting is more energy efficient than analogue broadcasting, and following digital switch over, digital broadcast towers now use less electricity than their analogue equivalents. Our work is about exploiting the benefits of digital broadcast TV to deliver improved energy efficiency."

Mark Beach, Professor of Radio Systems Engineering in the Department of Electrical and Electronic Engineering and Manager of the EPSRC Centre for Doctoral Training in Communications (CDT), remarked: "Peter was one of the students in the first cohort of researchers in the CDT. It is most rewarding to see this collaborative work with BBC research and development producing such high-quality research."

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