A 'smart' radio knows which radio frequencies are vacant, temporarily unoccupied, or occupied and acutely bounces from one to the other providing seamless, efficient communication for Soldiers in the battlefield. It is defined by its software, and is also known as a cognitive radio. But, how did it get its 'smarts'? How does it know what frequencies are open and what policy constraints exist in any given operational environment?rnEngineers with the Communications-Electronics Research, Development and Engineering Center have been developing key technologies to answer these questions. Specifically, they have focused on solving the problems that arise when managing spectrum, which is the range of frequencies used in radio communications.
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