Notations 26 System Model for f-OFDM SISO System In-Band Interference Analysis and Discussion 2.3.1 Channel Diagonalization and In-Band Interference-Free Systems 30 2.3.2 In-Band Interference Power 2.3.3 In-Band Interference Mitigation: A Practical Approach for Choosing CR Length 32 2.3.4 An Alternative for In-Band Interference Mitigation: Frequency Domain Equalization (FDE) 2.3.4.1 Linear Equalizers 2.3.4.2 Nonlinear Equalizers Numerical Results 2.4.1 Numerical Results for In-Band Interference Conclusion Appendix 1.2.1 Derivation of Zk Appendix 39 2.3.1 Proof of O pre Being a Strict Upper Triangle Appendix 39 3.4.1 Proof of Property 2.A.2 References 40 Windowed OFDM for Mixed-Numerology 5G and Beyond Systems 43 Bowen Yang, Xiaoying Zhang, Lei Zhang, Arman Farhang, Pei Xiao and Muhammad Ali Imran Introduction 43 W-OFDM System Model 3.2.1 Single Numerology System Model 3.2.2 System Model for Mixed Numerologies Inter-numerology Interference Analysis 3.3.1 Inter-numerology Interference Analysis for Numerology 1 3.3.2 Inter-numerology Interference Analysis for Numerology 2 Numerical Results and Discussion Conclusions 57 Derivation of (3.9) Derivations of (3.28) Derivations of (3.30) References Contents Generalized Frequency Division Multiplexing: Unified Multicarrier Framework 63 Ahmad Nimr, Zhongju Li, Marwa Chafii and Gerhard Fettweis Overview of Multicarrier Waveforms 4.1.1 Time-Frequency Representation 4.1.1.1 Discrete-Time Representation 4.1.1.2 Relation to Gabor Theory 4.1.2 GFDM As a Flexible Waveform 4.1.2.1 GFDM with Multiple Prototype Pulses 4.1.3 Generalized Block-Based Multicarrier 4.1.3.1 Transmitter 69 4.1.3.2 Receiver 69 GFDM As a Flexible Framework 4.2.1 GFDM Representations 4.2.1.1 Filter Bank Representation 4.2.1.2 Vector Representation 4.2.1.3 2D-Block Representation 4.2.1.4 GFDM Matrix Structure 4.2.2 Architecture and Extended Flexibility 4.2.2.1 Alternative Interpretation of GFDM 4.2.2.2 Extended Flexibility 4.2.2.3 Flexible Hardware Architecture GFDM for OFDM Enhancement 4.3.1 Transmitter 4.3.2 