Description

5G wireless technology is developing at an explosive rate and is one of the biggest areas of research within academia and industry. In this rapid development, signal processing techniques are playing the most important role. In 2G, 3G and 4G, the peak service rate was the dominant metric for performance. Each of these previous generations was defined by a standout signal processing technology that represented the most important advance made. In 2G, this technology was time-division multiple access (TDMA); in 3G, it was code-division multiple access (CDMA); and in 4G, it was orthogonal frequency-division multiple access (OFDMA). However, this will not be the case for 5G systems – there will be no dominant performance metric that defines requirements for 5G technologies. Instead, a number of new signal processing techniques will be used to continuously increase peak service rates, and there will be a new emphasis on greatly increasing capacity, coverage, efficiency (power, spectrum, and other resources), flexibility, compatibility, reliability and convergence. In this way, 5G systems will be able to handle the explosion in demand arising from emerging applications such as big data, cloud services, and machine-to-machine communication.

A number of new signal processing techniques have been proposed for 5G systems and are being considered for international standards development and deployment. These new signal processing techniques for 5G can be categorized into four groups:

1. new modulation and coding schemes
2. new spatial processing techniques
3. new spectrum opportunities
4. new system-level enabling techniques.

The successful development and implementation of these technologies for 5G will be challenging and will require huge effort from industry, academia, standardization organizations and regulatory authorities.

From an algorithm and implementation perspective, this book aims to be the first single volume to provide a comprehensive and highly coherent treatment of all the signal processing techniques that enable 5G, covering system architecture, physical (PHY)-layer (down link and up link), protocols, air interface, cell acquisition, scheduling and rate adaption, access procedures, relaying and spectrum allocation. This book is organized into twenty-three chapters in five parts.