Few developments have created as much excitement among RF/wireless engineers as cognitive radio. It provides a wireless network that is ‘truly’ aware of its operating environment and adjusts its operations to maintain desired communications and to overcome interference. This book gives a thorough knowledge of cognitive radio concepts, principles, standards, spectrum policy issues and product implementation details. This new edition has seven brand new chapters covering rendezvous techniques, reasoning about spectrum, measuring spectral activity, performance prediction, policy implementation and information on the latest standards, making it an indispensable resource for the RF and wireless engineer.