| Summary: | Software Defined Radio (SDR) is a radio in which all or majority of the functionality of the physical layer is implemented in software. One of the biggest benefits of SDR is the relative ease in which the functionality can be changed. Such flexibility could potentially be used in achieving interoperability of the communications systems. Cognitive Radio (CR)-a paradigm that combines SDR technology with a cognitive agent-allows radios to change their operational behaviors in
order to achieve a variety of goals, e.g. performance optimization, power saving, opportunistic use of resources, etc. Cognitive Radios are expected to play the leading role in the communications systems interoperability.
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