ABSTRACT
The demand for high speed and efficient wireless communication systems has grown in the last few decades. The progress in mobile communications, satellite applications, internet applications, and computer networks has given rise to new problems with regard to security and privacy. The goal of third and fourth generation mobile networks is to provide users with high data rates, and to provide a wider range of services, such as voice communications, videophones, and high-speed Internet access. In a conventional serial data system, the symbols are transmitted sequentially, and the frequency spectrum of each data symbol is allowed to occupy the entire available bandwidth. Orthogonal frequency division multiplexing communication systems have two primary drawbacks. This chapter also presents an overview of the key concepts discussed in the subsequent chapters of the book.
