With the rapid growth of new wireless devices and applications over the past decade, the demand for wireless radio spectrum is increasing relentlessly. The development of cognitive radio networking provides a framework for making the best possible use of limited spectrum resources, and it is revolutionising the telecommunications industry. This book presents the fundamentals of designing, implementing, and deploying cognitive radio communication and networking systems.

Part 3: Contraband Highway
At the border checkpoint in Hidalgo, Texas, a seemingly ordinary car is found to have firearms and ammunition hidden in its console and under its bumpers. Members of BORTAC, the tactical unit that identifies smuggling routes, discover what could be a remote transfer point for illicit goods. Further surveillance supports their theory, and the team hopes to close in on an active operation - if they can avoid detection by cartel scouts.