Broadband Terahertz Communication Technologies

Description

This book highlights the comprehensive knowledge and latest progress in broadband terahertz (THz) technology. THz communication technology is believed to be one of the major choices that succeed the fifth-generation (5G) communication technology. With years of efforts, the author’s team has created a number of world records in the generation, transmission, and reception of ultra wideband THz signal, realizing the MIMO transmission and reception of THz communication, the THz signal transmission with communication capacity of 1 Tbit / s, and the optical fiber and THz integrated transmission. A variety of linear and nonlinear algorithms for multi-carrier and single-carrier THz communication systems are developed, which greatly improves the transmission performance of broadband systems. The book covers in details the broadband THz signal generation, long-distance transmission, and high sensitivity detection. It is of great reference value for researchers, engineers, and graduate students in optical and wireless communications. Contents 1 Introduction 1.1 Research Background and Significance 1.2 Research Status at Home and Abroad 1.2.1 International Research Status 1.2.2 Domestic Research Status 1.3 Challenges of Terahertz Communication Research 1.4 Main Contents and Structure of the Book References 2 Generation and Detection of Terahertz Signal 2.1 The Generation of Terahertz Signal 2.1.1 Generating Terahertz Signal by Electronic Devices 2.1.2 Generating Terahertz Signal by Photonics Methods 2.2 The Reception of Terahertz Signal 2.2.1 Direct Detection of Terahertz Signal 2.2.2 Heterodyne Coherent Detection 2.3 Comparison of Two Kinds of Photodetectors 2.4 Transmission Link of Terahertz Signal 2.4.1 Free Space Channel Transmission Model 2.4.2 Atmospheric Absorption of Terahertz Signal 2.5 Conclusion References 3 Basic Algorithm and Experimental Verification of Single-Carrier Terahertz Communication System 3.1 Introduction 3.2 Basic DSP Algorithm in High-Speed Single-Carrier Terahertz Communication System 3.2.1 Basic DSP Algorithm in Single-Carrier Terahertz Communication System 3.2.2 Back-End Signal Processing Algorithm in Single-Carrier Terahertz Communication System 3.3 Experimental Research on Electro-Generated Terahertz Wireless Communication System 3.3.1 Experimental Setup of Electric Generation Terahertz Wireless Communication System 3.3.2 Experimental Results and Analysis 3.4 Experimental Research on Photogenerated Single-Carrier 16QAM Terahertz Signal Transmission System 3.4.1 Experimental Setup 3.4.2 Experimental Results and Analysis 3.5 Conclusion References 4 Basic Algorithms and Experimental Verification of Multi-carrier Terahertz Communication 4.1 Introduction 4.2 Terahertz Communication System Based on Optical Heterodyne Beat Frequency Scheme and Coherent Reception 4.3 Multi-carrier OFDM Modulation Format 4.4 Discrete-Fourier-Transform Spread Technology 4.4.1 Principle of Discrete-Fourier-Transform Spread Technology 4.4.2 Applications of Discrete-Fourier-Transform Spread Technology 4.4.3 Test Experiment 4.5 Intrasymbol Frequency-Domain Averaging Technology 4.5.1 Channel Estimation 4.5.2 Principle of Intrasymbol Frequency-Domain Averaging Technology 4.6 OFDM Millimeter Wave Coherent Reception System Based on DFT-S and ISFA 4.6.1 Experimental Setup 4.6.2 Experiment Results 4.7 Volterra Nonlinear Compensation Technology 4.7.1 Principle of Parallel Volterra Nonlinear Compensation Technology 4.8 Experimental Verification of Terahertz RoF-OFDM Communication System 4.8.1 Experimental Setup of 350−510 GHz Terahertz RoF-OFDM Communication System 4.8.2 Experimental Results and Analysis of 350–510 GHz Terahertz RoF-OFDM Communication System 4.8.3 High-Order QAM Terahertz RoF-OFDM Communication System Experiment 4.8.4 Experimental Results of High-Order QAM Terahertz RoF-OFDM Communication System 4.9 Conclusion References 5 Terahertz Signal MIMO Transmission 5.1 Introduction 5.2 2 × 2 MIMO Wireless Link Based on Optical Polarization Multiplexing 5.3 4 × 4 MIMO Wireless Link Based on Antenna Polarization Multiplexing 5.3.1 Study of Antenna Isolation and Crosstalk 5.3.2 Principle of Antenna Polarization Multiplexing 5.4 Wireless Crosstalk in MIMO Wireless Link 5.5 2 × 2 MIMO Wireless Link Based on Antenna Polarization Diversity with Low Wireless Crosstalk and a Simple Structure 5.6 2 × 2 MIMO Wireless Terahertz Wave Signal Transmission System 5.6.1 Introduction 5.6.2 Experimental Setup 5.6.3 Experimental Results 5.7 Conclusion References 6 Multi-band Terahertz Signal Generation and Transmission 6.1 Introduction 6.2 Multi-band Terahertz MIMO Transmission Architecture 6.3 Multi-band Terahertz Transmission Experimental Device Diagram 6.4 Experimental Results of Multi-band Terahertz Transmission 6.5 Summary References 7 Frequency-Stable Photogenerated Vector Terahertz Signal Generation 7.1 Introduction 7.2 Principle of Optical External Modulator 7.2.1 Phase Modulator 7.2.2 Mach–Zehnder Modulator 7.2.3 Optical I/Q Modulator 7.3 Multi-Frequency Vector Terahertz Signal Generation Scheme Based on Cascaded Optical External Modulator 7.3.1 Technical Scheme of Multi-frequency Vector Terahertz Signal Generation Based on Cascaded Optical External Modulator 7.3.2 Optical Terahertz Signal Transmission Experiment Setup 7.3.3 Experimental Results and Analysis 7.4 Vector Terahertz Signal Generation Scheme Based on Carrier Suppression Eighth Frequency and Optical Single Sideband 7.4.1 Technical Scheme of Vector Terahertz Signal Based on Optical Carrier Suppression Eighth Frequency and Optical Single-Sideband Modulation 7.4.2 Experimental Setup of D-band Terahertz Signal Transmission Based on CSFE Scheme and Optical SSB Modulation 7.4.3 Experimental Results and Analysis 7.5 Summary References 8 Application of Probabilistic Shaping Technology in Terahertz Communication 8.1 Introduction 8.2 Principles of Probabilistic Shaping Technology 8.2.1 Probabilistic Shaping Modulation Principle Based on Maxwell–Boltzmann Distribution 8.2.2 Probabilistic Shaping Realization Method Combined with FEC Coding and Decoding Technology 8.3 Simulation Research on Probabilistic Shaping Technology 8.4 Experimental Research on Probabilistic Shaping Technology in Single-Carrier Terahertz Communication 8.5 Experimental Study of Probabilistic Shaping Technology in Multi-Carrier W-band Communication System 8.5.1 Experimental Setup 8.5.2 Experimental Results 8.6 Summary References 9 Terahertz Communication System Based on KK Receiver 9.1 The Introduction 9.2 The Principle and Application of KK Algorithm 9.2.1 Intersignal Beat Frequency Interference (SSBI) Generation 9.2.2 Minimum Phase Condition 9.3 Application of KK Receiver 9.4 KK Algorithm Performance Simulation 9.5 Experimental Research on Photon-Assisted Single-Carrier RoF Communication System 9.5.1 Experimental Setup 9.5.2 Experimental Results and Analysis 9.6 Summary References 10 Ultra-Large-Capacity Terahertz Signal Wireless Transmission System 10.1 Introduction 10.2 Methods of High-Speed Wireless Transmission 10.2.1 Photon-Assisted Methods 10.2.2 Multi-dimensional Multiplexing 10.2.3 High-Order QAM Modulation Combined with Probabilistic Shaping Technology 10.2.4 Advanced DSP Algorithm 10.3 Large-Capacity Terahertz Transmission 10.3.1 328 Gb/s Dual Polarization D-band Terahertz 2 × 2 MU-MIMO Optical Carrier Wireless Transmission 10.3.2 Wireless Transmission of 1 Tb/s Terahertz Signal in D-band 10.4 Summary References 11 Application of Chaotic Encryption Technology in Terahertz Communication 11.1 Introduction 11.2 The Principle of Chaotic Encryption Technology 11.3 Application of Third-Order Chaotic Encryption Technology in Terahertz Communication 11.3.1 Experimental Setup of Third-Order Chaotic Encryption Terahertz Communication System 11.3.2 Experimental Results and Analysis 11.4 Summary References 12 Large-Capacity Optical and Wireless Seamless Integration and Real-Time Transmission System 12.1 Introduction 12.2 Principle of Photonic Millimeter Wave Demodulation 12.2.1 Principle of Photon Demodulation Based on Push–Pull MZM 12.2.2 PM-Based Photon Demodulation Principle 12.2.3 Polarization Demultiplexing of PDM-QPSK-Modulated Fiber-Wireless-Fiber Fusion System 12.3 Experiment of Q-band Fiber-Wireless-Fiber Fusion System Based on Push–Pull MZM 12.4 Experiment of W-band Fiber-Wireless-Fiber Fusion System Based on Push–Pull MZM 12.5 Experiment of W-band Fiber-Wireless-Fiber Fusion System Based on PM 12.6 Real-Time Transmission Experiment Based on Heterodyne Detection 12.6.1 Real-Time Transmission Experiment Graph 12.6.2 Experimental Results 12.7 Summary References 13 THz and Optical Fiber Communication Seamless Integration System 13.1 Introduction 13.2 Process Algorithm for Heterodyne Coherent Detection 13.3 Optical Fibe-Terahertz Wireless-Fiber Seamless Fusion Communication System 13.3.1 System Experiment 13.3.2 Experimental Results 13.4 Optical Fiber-Terahertz Wireless-Optical Fiber 2 × 2MIMO Transmission System 13.4.1 System Experiment 13.4.2 Experimental Results 13.5 Summary References