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MINISTRY OF EDUCATION AND TRAINING HANOI UNIVERSITY OF SCIENCE AND TECHNOLOGY DO VIET HA MƠ HÌNH ĐẶC TÍNH KÊNH TRUYỀN CHO THÔNG TIN THỦY ÂM VÙNG NƯỚC NÔNG CHANNEL MODELING FOR SHALLOW UNDERWATER ACOUSTIC COMMUNICATIONS DOCTORAL THESIS OF TELECOMMUNICATIONS ENGINEERING HA NOI - 2017 MINISTRY OF EDUCATION AND TRAINING HANOI UNIVERSITY OF SCIENCE AND TECHNOLOGY DO VIET HA MƠ HÌNH ĐẶC TÍNH KÊNH TRUYỀN CHO THƠNG TIN THỦY ÂM VÙNG NƯỚC NÔNG CHANNEL MODELING FOR SHALLOW UNDERWATER ACOUSTIC COMMUNICATIONS Specialization: Telecommunications Engineering Code No: 62520208 DOCTORAL THESIS OF TELECOMMUNICATIONS ENGINEERING SUPERVISORS: Assoc.Prof Van Duc Nguyen Dr Van Tien Pham Hanoi - 2017 DECLARATION OF AUTHORSHIP I hereby declare that this dissertation titled, "Channel Modeling for Shallow Underwater Acoustic Communications”, and the work presented in it are entirely my own original work under the guidance of my supervisors I confirm that: • This work was done wholly or mainly while in candidature for a PhD research degree at Hanoi University of Science and Technology • Where any part of this dissertation has previously been submitted for a degree of any other qualification at Hanoi University of Science and Technology or any other institution, this has been clearly stated • Where I have consult the published work or others, this is always given With the exception of such quotations, this dissertation is entirely my own work • I have acknowledged all main source of help • Where the thesis is based on work done by myself jointly with others, I have made exactly what was done by others and what I have contributed myself SUPERVISORS Hanoi, August 27, 2017 PhD STUDENT Assoc.Prof Van Duc Nguyen Dr Van Tien Pham Do Viet Ha ACKNOWLEDGEMENTS First and foremost, I would like to thank my advisor Associate Prof Dr Nguyen Van Duc for for providing an excellent atmosphere for doing research, for his valuable comments, constant support and motivation His guidance helped me in all the time of research and writing of this dissertation I could not have imagined having a better advisor and mentor for my PhD I would also like to thank Dr Pham Van Tien for their advice and feedback, also for many educational and inspiring discussions My sincere gratitude goes to the members in the Wireless Communication Lab, School of Electronics and Telecommunications, Hanoi University of Science and Technology, Hanoi, Vietnam Without their support and friendship it would have been difficult to complete my PhD studies I am also thankful to Dr Nguyen Tien Hoa for his invaluable instructions in presenting my dissertation I would also like to express my deepest gratitude to my parents, my husband, my son, and my daughter They were always supporting me and encouraging me with their best wishes, they were standing by me throughout my life Hanoi, August 27, 2017 PhD STUDENT Do Viet Ha Contents TABLE OF CONTENTS ABBREVIATIONS iv LIST OF FIGURES vi LIST OF TABLES ix INTRODUCTION Chapter DESIGN OF SHALLOW UWA CHANNEL SIMULATORS 15 1.1 Introduction 16 1.2 Overview of Simulation Models for UWA Channels 1.2.1 Rayleigh and Rice channels 1.2.2 Deterministic SOS Channel Models 1.2.3 Deterministic SOC Channel Models 19 19 20 21 1.3 The Geometry-based UWA Channel Simulator 21 1.3.1 Developing the Reference Model from the Geometrical Channel Model 22 1.3.2 The Simulation Model 27 1.3.3 The Estimated Parameters of the Simulation Model 27 1.3.4 Simulation Results 28 1.4 The Measurement-based UWA Channel Simulator 1.4.1 The Reference Model from the Measurement Data 1.4.2 The Simulation Model 1.4.3 Estimated Channel Parameters of the Simulation Model 1.4.4 Comparison of the Two Channel Simulators 28 29 32 33 34 1.5 The Proposed Approach for the Static UWA Channel 1.5.1 Descriptions 1.5.2 Results and Discussions 35 36 38 i ii 1.6 The Proposed Approach for the Case of Doppler Effects 1.6.1 The Measurement Data 1.6.2 The Conventional Measurement-based Simulators 1.6.3 The Proposed Channel Simulator 39 40 41 45 1.7 Conclusions 50 Chapter MODELING OF DOPPLER POWER SPECTRUM FOR SHALLOW UWA CHANNELS 53 2.1 Introduction 53 2.2 The Proposed Doppler Spectrum Model 2.2.1 The Doppler Effects in Shallow UWA Channels 2.2.2 The Proposed Doppler Model for UWA Channels 56 56 59 2.3 The Description of Doppler Spectrum Measurements 2.3.1 Experimental Setup 2.3.2 Measurement Scenarios 2.3.3 Reference Model from the Measurement Data 63 63 64 66 2.4 Parameter Optimizations of the Proposed Model 67 2.5 Measurement and Doppler Modeling Results 2.5.1 Scenario 2.5.2 Scenario 2.5.3 Scenario 68 69 71 75 2.6 Conclusions 77 Chapter UWA-OFDM SYSTEM PERFORMANCE ANALYSIS USING THE MEASUREMENT-BASED UWA CHANNEL MODEL 78 3.1 Introduction 79 3.2 ICI Analysis of UWA-OFDM Systems 3.2.1 SIR Calculation 3.2.2 Ambient Noise Power 3.2.3 SINR Calculation 81 82 83 84 3.3 Capacity Calculation 86 iii 3.4 Numerical Results 3.4.1 The SIR 3.4.2 The SINR 3.4.3 Channel Capacity 3.4.4 Transmit Power 87 88 89 90 92 3.5 Chapter Conclusions 96 CONCLUSIONS 99 APPENDIX 103 LIST OF PUBLICATIONS 105 ABBREVIATIONS ACF Autocorrelation Function AOA Angles of Arrival AOD Angles of Departure AWGN Additive White Gaussian Noise BPSK Binary Phase Shift Keying CIR Channel Impulse Response FCF Frequency Correlation Function ICI Inter-Channel Interference INLSA Iterative Nonlinear Least Square Approximation ISI Inter-Symbol Interference LNA Low Noise Amplifier LOS Line of Sight LPNM Lp-Norm Method MESS Method of Equally Spaced Scatterers MSE Mean Square Error OFDM Orthogonal Frequency Division Multiplexing PDF Probability Density Function PDP Power Delay Profile PN Pseudo-Noise PSD Power Spectra Density Rx Receiver SINR Signal to Interference plus Noise Ratio SIR Signal-to-Interference Ratio SNR Signal to Noise Ratio SOC Sum-of-Cisoids SOS Sum-of-Sinusoids TCF Time Correlation Function iv v T-FCF Time-Frequency Correlation Function TVCIR Time Variant Channel Impulse Response TVCTF Time-Variant Channel Transfer Function Tx Transmitter UWA Underwater Acoustic WLAN Wireless Local Area Network WSSUS Wide-Sense Stationary Uncorrelated Scattering List of Figures Multipath interference in UWA communication systems 1.1 The methodology behind the geometry-based channel modelling [17, 55] 17 1.2 The methodology behind the measurement-based channel modelling [31, 56] 18 1.3 The scheme of designing the geometry-based channel simulator [17, 55] 22 1.4 The geometrical model for shallow UWA channels with randomly distributed scatterers Si,n (•) on the surface (i = 1) and the bottom (i = 2) [55] 23 1.5 The comparison between the normalized FCF of the reference model and that obtained by the geometry-based simulator 29 1.6 1.7 Illustration of the measurement setup in Halong bay 30 ˆ t)|2 for the transmission distance of 150 m 31 The measured |h(τ, 1.8 The measured and normalized PDP ρ(τ ) obtained for the transmission distance of 150 m 1.9 32 The comparison of the normalized FCF obtained by the two simulators to that of the reference model 35 1.10 The flowchart of proposed approach to design the static UWA channel simulator 36 1.11 The comparison between the normalized FCF of the reference model and that obtained by the measurement-based, the geometry-based, and the proposed simulators 38 1.12 The normalized Doppler power spectrum 41 1.13 a) The reference T-FCF derived from the measurement results b) The T-FCF of the channel simulation model designed by the conventional simulator 43 1.14 The comparison between the normalized T-FCF of the reference model and that obtained by the conventional measurement-based simulator 44 1.15 The flowchart of the proposed approach for the case of moving Rx vi 46 ... TRAINING HANOI UNIVERSITY OF SCIENCE AND TECHNOLOGY DO VIET HA MƠ HÌNH ĐẶC TÍNH KÊNH TRUYỀN CHO THÔNG TIN THỦY ÂM VÙNG NƯỚC NÔNG CHANNEL MODELING FOR SHALLOW UNDERWATER ACOUSTIC COMMUNICATIONS... invaluable instructions in presenting my dissertation I would also like to express my deepest gratitude to my parents, my husband, my son, and my daughter They were always supporting me and encouraging... Fig 2.11) 76 3.1 System specification 88 ix Luận án đầy đủ file: Luận án full