Chapter 8. Cognitive Techniques: Position Awareness
John Polson and Bruce A. Fette
General Dynamics C4 SystemsScottsdale, Arizona, and Rhome, Texas
For cognitive radio (CR) to reach its full potential as an efficient member of a network or as an aid in users’ daily tasks, and even to conserve the precious spectrum resource, a radio must primarily know its position and what time it is. From position and time, a radio can (1) calculate the antenna-pointing angle that best connects to another member of the network; (2) place a transmit packet on the air so that it arrives at the receiver of another network member at precisely the proper timeslot to minimize interference with other users; or (3) guide its user in his or her daily tasks ...