Theory and Applications of OFDM and CDMA

Аннотация

The book is organized as follows. In Chapter 1, we give a brief overview of the basic principles of digital communications and introduce our notation. We represent signals as vectors, which often leads to a straightforward geometrical visualization of many seemingly abstract mathematical facts. The concept of orthogonality between signal vectors is a key to the understanding of OFDM and CDMA, and the Euclidean distance between signal vectors is an important concept to analyze the performance of a digital transmission system. Wireless communication systems often have to cope with severe multipath fading in a mobile radio channel. Chapter 2 treats these aspects. First, the physical situation of multipath propagation is analyzed and statistical models of the mobile radio channel are presented. Then, the problems of digital transmission over these channels are discussed and the basic principles of Chapter 1 are extended for those channels.