Wireless mobile communications took advantage of the adoption of Spread-Spectrum (SS) and Code Division Multiple Access (CDMA) technologies implemented through advanced Digital Signal Processing (DSP) techniques. In particular, the advent of low-cost Very Large Scale Integration (VLSI) chips has allowed the design and deployment of efficient commercial communication systems based on spread-spectrum signals, namely, the different CDMA cellular radio networks currently in operation or being deployed. The aim of this chapter is to provide the reader with a basic understanding of the spread-spectrum technologies that lie at the foundation of such systems. After a short introduction to wireless communications (Sect. 1), the chapter develops into a description of the basic characteristics of digital spread-spectrum signals (Sect. 2). This sets the framework for the subsequent study of CDMA communication systems (Sect. 3) including receiver architecture (Sect. 4). The final part of the chapter (Sect. 5) is devoted to the description of major second generation(2G), third generation (3G), and Beyond-3G CDMA techniques as implemented in different parts of the world.
Spread-Spectrum Signals for Digital Communications
GIANNETTI, FILIPPO;LUISE, MARCO
2007-01-01
Abstract
Wireless mobile communications took advantage of the adoption of Spread-Spectrum (SS) and Code Division Multiple Access (CDMA) technologies implemented through advanced Digital Signal Processing (DSP) techniques. In particular, the advent of low-cost Very Large Scale Integration (VLSI) chips has allowed the design and deployment of efficient commercial communication systems based on spread-spectrum signals, namely, the different CDMA cellular radio networks currently in operation or being deployed. The aim of this chapter is to provide the reader with a basic understanding of the spread-spectrum technologies that lie at the foundation of such systems. After a short introduction to wireless communications (Sect. 1), the chapter develops into a description of the basic characteristics of digital spread-spectrum signals (Sect. 2). This sets the framework for the subsequent study of CDMA communication systems (Sect. 3) including receiver architecture (Sect. 4). The final part of the chapter (Sect. 5) is devoted to the description of major second generation(2G), third generation (3G), and Beyond-3G CDMA techniques as implemented in different parts of the world.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
