Signal Processing for 5G: Algorithms and Implementations

Chapter 3From OFDM to FBMC: Principles and Comparisons

Wei Jiang and Thomas Kaiser

1. 3.1 Introduction
2. 3.2 The Filter Bank
   1. 3.2.1 The Synthesis Filters
   2. 3.2.2 The Analysis Filters
3. 3.3 Polyphase Implementation
4. 3.4 OFDM
   1. 3.4.1 Cyclic Prefix
   2. 3.4.2 Guard Band
5. 3.5 FBMC
6. 3.6 Comparison of FBMC and Filtered OFDM
   1. 3.6.1 Classical Approaches to Sidelobe Suppression
   2. 3.6.2 Performance
   3. 3.6.3 Complexity
7. 3.7 Conclusion
8. References

3.1 Introduction

With the proliferation of smart phones and tablet computers, the demand on transmission rates of wireless communication systems has grown exponentially in the early years of the twenty-first century. Although wireless local area networks can contribute significantly to offload wireless traffic, their applications are generally limited to stationary and indoor scenarios. To also provide high-data-rate access in mobile and outdoor environments, cellular systems have to use more and more spectral resources, since the rate at which spectral efficiency is increasing is relatively slow. As a result, the signal transmission bandwidths of cellular systems has become increasingly wide. Global System for Mobile Communications (GSM) [1] adopts the time-division multiple-access (TDMA) technique to support eight voice users over each 200-kHz channel. The spread-spectrum signals of wideband code-division multiple-access (WCDMA) occupy 5 MHz to satisfy the requirements of 3G systems, whose transmission rate is at least 384 kbps. To comply with the International Mobile ...