通信系统中升余玄滚降特性,真实反应了通信系统的抑制码间串绕的原因.-The rapid growth of wireless communications and its prevasive use in all walks of life are changing the way we communiction in some foundamental ways.Most important,reliance on radio propagation as the physical mechansim resonsible for the transport of information-bearing signals from the transmitter to the receiver has endowed communcations with a distinctive feature,namely,mobility.

Modern Wireless Communications is a new book aimed at the teching of a course that could follow a traditional course on communication systems,as an integral part of an undergraduate program in electrical engineering or as the first graduate course on wireless communication.The primay focus of the book is on the physical layer, emphasizing the fundamentals of radio propagation and communication-theoretic aspects of multiple-access techniques.Many aspects of wireless communcations are covered in an introductory level and book form for the first time.