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 Cognitive Radio Trials

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Date posted: 18/04/2007

Wireless systems being trialled in Dublin this week by Motorola and UK defence firm QinetiQ, along with researchers from Ireland and the US, are designed to be ?cognitive?. Yup, they are designed to think for themselves.

Cognitive radio is designed to tackle the congestion from more and more devices using radio to communicate. It does it by ditching the notion of transmitting on a fixed frequency.

Instead, devices will smoothly switch frequency, signal modulation and power to make sure no part of the spectrum is wasted. The tests are part of a conference called DySpan, which is all about improving spectrum flexibly.

Keith Nolan of Ireland's Centre for Telecommunications Value-Chain Research (CTVR) is part of the research team organising the trials. "There's an ever-increasing demand for more spectrum. We are all interested in looking at using the spectrum in more exciting ways that use it more efficiently."

Motorola's Dublin trial involves transmitting a video stream across part of the spectrum usually used for TV. Another wireless link, that must not be interfered with, is then be switched on. "The first link can switch to use a different part of the spectrum without interrupting the video transmission," says Nolan.

See the full Story via external site: www.newscientist.com

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