“Cognitive Radio”
Simon Haykin
Abstract
Cognitive
radio is sometimes described as a “radio that computes” or a “computer that
transmits.” From these descriptions, it is apparent that computer technology
plays a critical role in the design of a cognitive radio system. This said, it may not be surprising that cognitive radio was first described
in the computer technology literature. Moreover, the idea of cognitive radio
has been embraced by the Federal Communication Commission (FCC). I describe cognitive radio as a “disruptive,
but unobtrusive technology”, which, in the course of time, will impact wireless
communication in different ways. However, for this to happen, we will have
develop design strategies for building cognitive radio systems that will
realize significant improvement in utilization of the radio spectrum, subject
to the following system requirements:
§
Reliable communication with assured
quality of service
•
Robust performance
•
Avoidance of chaotic behavior, the potential for which exists in a cognitive
radio system.
In
this lecture, I will address these issues, building on my paper that appeared
in the IEEE J. Selected Areas in Communications, February 2005.