A cognitive radio system is 'aware' operating environment and automatically adjusts itself to maintain the desired communications-such as having 'in' a trained radio operator to make constant adjustments for maximum performance. Although still nascent technology, cognitive radio is being driven by the U.S. military and for mission-critical civilian communications (such as emergency and public safety services). * The first book on the revolutionary technology that will be very important for the military, emergency, and public safety communications * A multi-volume contribution which is written by leaders in an exciting new area * Describes the location-determination capabilities of cognitive radio (the precise location of all units in a cognitive radio network can be determined in real time)