Intelligent Reflecting Surface-Aided Physical-Layer Security / / by Feng Shu, Jiangzhou Wang

• Record Nr.: UNINA9910751387403321
• Autore: Shu Feng
• Pubbl/distr/stampa: Cham : , : Springer Nature Switzerland : , : Imprint : Springer, , 2023
• ISBN: 3-031-41812-3
• Edizione: [1st ed. 2023.]
• Descrizione fisica: 1 online resource (250 pages)
• Collana: Wireless Networks, , 2366-1445
• Altri autori (Persone): WangJiangzhou
• Disciplina: 004.6
• Soggetti: Computer networks; Wireless communication systems; Mobile communication systems; Computer networks - Security measures; Telecommunication; Computer Communication Networks; Wireless and Mobile Communication; Mobile and Network Security; Communications Engineering, Networks
• Lingua di pubblicazione: Inglese
• Formato: Materiale a stampa
• Livello bibliografico: Monografia
• Nota di contenuto: Contents 1 Intelligent Reflecting Surface-aided Physical-layer Security Communications -- 1.1 Overview of Physical-layer Security -- 1.2 Overview of Intelligent Reflecting Surface -- 1.3 Organization of the Monograph -- References -- 2 Enhanced Secrecy Rate Maximization for Directional Modulation Networks via IRS -- 2.1 Introduction -- 2.2 System Model -- 2.3 Proposed high-performance GAI-based Max-SR method -- 2.3.1 Optimize the beamforming vectors v1 and v2 given the IRS phase-shift matrix ���� -- 2.3.2 Optimize IRS phase-shift matrix ���� given the beamforming vectors -- 2.3.3 Overall Algorithm -- 2.4 Proposed low-complexity NSP-based Max-SR method -- 2.4.1 Optimization of beamforming vectors given IRS phase-shift matrix ���� -- 2.4.2 Optimization of IRS phase-shift matrix ���� with given beamforming vectors -- 2.4.3 Overall Algorithm -- 2.5 Simulation and Discussion -- 2.5.1 Impact of the Number of IRS Phase-shift -- 2.5.2 Impact of the IRS Location -- 2.6 Conclusion. -- ; References -- Contents 3 High-performance Estimation of Jamming Covariance Matrix for IRS-aided Directional Modulation Network with a Malicious Attacker -- 3.1 Introduction -- 3.2 System Model -- 3.3 Proposed Three Estimation Methods -- 3.3.1 Proposed EVD method -- 3.3.2 Proposed PEM-GD method -- 3.3.3 Proposed PEM-AO method -- 3.3.4 Computational Complexity Analysis and CRLBs -- 3.4 Simulation results and Discussions -- 3.5 Conclusion -- References -- 4 Beamforming and Power Allocation for Double-IRS-aided Two-Way Directional Modulation Network -- 4.1 Introduction -- 4.2 System Model and Problem Formulation -- 4.3 Proposed Transmit Beamforming Methods -- 4.3.1 Proposed GPG Method of Synthesizing the Phase-Shifting Matrices at Two IRSs -- 4.3.2 Proposed Max-SV Method -- 4.3.3 Generalized leakage method 4.4 Proposed HICF Power Allocation Strategy -- 4.4.1 Problem formulation -- 4.4.2 2D-ES and 1D-ES PA strategies -- 4.4.3 Proposed HICF PA strategy -- 4.5 Simulation Results andDiscussions -- 4.6 Conclusion -- 4.7 Appendix -- References -- 5 Beamforming and Transmit Power Design for Intelligent Reconfigurable Surface-aided Secure Spatial Modulation -- 5.1 Introduction -- 5.2 System Model -- 5.2.1 IRS-Aided Secure Spatial Modulation System -- 5.2.2 Problem Formulation -- 5.3 Approximation of the Ergodic Mutual Information -- 5.3.1 Traditional Approximate Secrecy Rate Expression -- 5.3.2 Proposed Newly Approximate Secrecy Rate Expression -- 5.4 Beamforming Design for given transmit power based on Approximate expression of SR -- 5.4.1 Proposed Max-NASR-SCA -- 5.4.2 Proposed Max-NASR-DA -- 5.4.3 Proposed Max-TASR-SDR method -- 5.5 Transmit Power Design for Given Beamforming based on Approximate Expression of SR -- 5.5.1 Transmit Power Design based on Proposed NASR -- 5.5.2 Transmit Power Design based on TASR -- 5.6 Complexity Analysis -- 5.7 Simulation Results and Analysis -- 5.7.1 Rayleigh fading channel -- 5.7.2 Rayleigh fading channel considering path loss -- 5.8 Conclusion -- References -- 6 IRS-Aided Covert Wireless Communications with Delay Constraint -- 6.1 Introduction -- 6.2 System Model -- 6.2.1 Considered Scenario and Assumptions -- 6.2.2 Binary Hypothesis Testing at Willie -- 6.2.3 Transmission from Alice to Bob -- 6.3 Covert Communication Design with Global Channel State Information -- 6.3.1 Optimization Problem and Perfect Covertness Condition -- 6.3.2 Joint Transmit Power and Reflect Beamforming Design -- 6.3.3 Low-Complexity Algorithm -- 6.4 Covert Communication Design without Willie’s instantaneous CSI -- 6.4.1 Expression for Covertness Constraint -- 6.4.2 Optimal Design without Willie’s Instantaneous CSI -- 6.5 Numerical Results -- 6.5.1 With Global CSI -- 6.5.2 Without Willie’s Instantaneous CSI -- 6.6 Conclusion -- 6.7 Appendix -- 6.7.1 Proof of Theorem 6.1 -- 6.7.2 Proof of Lemma 6.1 -- 6.7.3 Proof of Theorem 6.2 -- References -- 7 Intelligent Reflecting Surface Aided Secure Transmission with Colluding Eavesdroppers -- 7.1 Introduction -- 7.2 System Model and Problem Formulation -- 7.3 Proposed Solutions -- 7.3.1 SDR-Based Method -- 7.3.2 Proposed LC-AO Algorithm -- 7.4 Simulation Results -- 7.5 Conclusion -- References -- 8 Secure Multigroup Multicast Communication Systems via Intelligent Reflecting Surface -- 8.1 Introduction -- 8.2 System Model -- 8.3 SDR-based Alternating Optimization Method -- 8.3.1 Optimization with respect to {W����, Q} -- 8.3.2 Optimization with respect to U -- 8.3.3 Overall Algorithm and Complexity Analysis -- 8.4 Low-complexity SOCP-based Algorithm -- 8.4.1 Optimization with respect to beamforming vector and AN -- 8.4.2 Optimization with respect to phase shifts -- 8.4.3 Overall Algorithm and Complexity Analysis -- 8.5 Simulation and analysis -- 8.6 Conclusion -- References -- 9 Beamforming Design for IRS-aided ; Decode-and-Forward Relay Wireless Network -- 9.1 Introduction -- 9.2 System Model -- 9.3 Proposed Three High-Performance Beamforming Schemes -- 9.3.1 Proposed AIS-based Max-RP Method -- 9.3.2 Proposed NSP-based Max-RP plus MRC Method -- 9.3.3 Proposed IRSES-based Max-RP plus MRC Method -- 9.4 Numerical Results -- 9.5 Conclusion -- References -- 10 Performance Analysis of Wireless Network Aided by Discrete[1]Phase-Shifter IRS -- 10.1 Introduction. -- 10.2 System Model -- 10.3 Performance Loss Derivation and Analysis in the LoS Channels -- 10.3.1 Derivation of Performance Loss in LoS Channels -- 10.3.2 Performance Loss of SNR at Bob -- 10.3.3 Performance Loss of Achievable Rate at Bob -- 10.3.4 Performance Loss of BER at Bob -- 10.4 Performance Loss Derivation and Analysis in the Rayleigh Channels -- 10.4.1 Derivation of Performance Loss in the Rayleigh Channels -- 10.4.2 Performance Loss of SNR at Bob -- 10.4.3 Performance Loss of Achievable Rate at Bob -- 10.4.4 Performance Loss of BER at Bob -- 10.5 Simulation Results and Discussions -- 10.6 Conclusion -- References -- 11 Conclusions and Future Research Directions.
• Sommario/riassunto: This book discusses the problems of Physical Layer Security (PLS) in Intelligent Reflecting Surface (IRS)-assisted wireless networks. It also discusses the corresponding methods to solve these problems in a comprehensive style. Furthermore, some potential challenges are well analyzed. This book is divided into 11 chapters. Chapter 1 introduces the propagation characteristics of IRS-aided PLS communications. From Chapter 2 to Chapter 10, The authors mainly provide deep investigations of different PLS problems of IRS-aided wireless networks, namely, directional modulation (DM) networks. Chapter 11 draws a conclusion and includes the future research directions. Researchers working in wireless communications, or advanced-level computer science or electrical engineering students, can learn about secure communication in the physical layer through our book. Professionals or engineers working in this field will also benefit from this book.

3D Structure from Multiple Images of Large-Scale Environments : European Workshop, SMILE'98, Freiburg, Germany, June 6-7, 1998, Proceedings / / edited by Reinhard Koch, Luc van Gool

• Record Nr.: UNINA9910143476203321
• Pubbl/distr/stampa: Berlin, Heidelberg : , : Springer Berlin Heidelberg : , : Imprint : Springer, , 1998
• ISBN: 3-540-49437-5
• Edizione: [1st ed. 1998.]
• Descrizione fisica: 1 online resource (VIII, 356 p.)
• Collana: Lecture Notes in Computer Science, , 1611-3349 ; ; 1506
• Disciplina: 621.367
• Soggetti: Computer vision; Artificial intelligence; Pattern recognition systems; Computer Vision; Artificial Intelligence; Automated Pattern Recognition
• Lingua di pubblicazione: Inglese
• Formato: Materiale a stampa
• Livello bibliografico: Monografia
• Note generali: Bibliographic Level Mode of Issuance: Monograph
• Nota di bibliografia: Includes bibliographical references at the end of each chapters and index.
• Nota di contenuto: Invited Presentations -- Cumuli, Panorama, and Vanguard Project Overview -- Dualizing Scene Reconstruction Algorithms -- Multiview Relations and Correspondence Search -- Geometry of Multiple Affine Views -- Tensor Embedding of the Fundamental Matrix -- Optimal Estimation of Matching Constraints -- Matching and Reconstruction from Widely Separated Views -- Improving Block-Based Disparity Estimation by Considering the Non-uniform Distribution of the Estimation Error -- 3D Structure from Multiple Images -- Beyond the Epipolar Constraint: Integrating 3D Motion and Structure Estimation -- Multi-Camera Acquisitions for High-Accuracy 3D Reconstruction -- Metric 3D Surface Reconstruction from Uncalibrated Image Sequences -- Automatic 3D Model Construction for Turn-Table Sequences -- Calibration and Reconstruction Using Scene Constraints -- Geometrically Constrained Structure from Motion: Points on Planes -- Euclidean and Affine Structure/Motion for Uncalibrated Cameras from Affine Shape and Subsidiary Information -- From Ordinal to Euclidean ; Reconstruction with Partial Scene Calibration -- Imposing Euclidean Constraints During Self-Calibration Processes -- Interactive 3D Modeling from Multiple Images Using Scene Regularities -- Range Integration and Augmented Reality Applications -- Integration of Multiple Range Maps through Consistency Processing -- Fitting Geometrical Deformable Models to Registered Range Images -- The Use of Reality Models in Augmented Reality Applications -- Applying Augmented Reality Techniques in the Field of Interactive Collaborative Design -- A Guided Tour Through Multiview Relations.
• Sommario/riassunto: The contributions in this volume give an overview of state-of-the-art results presented at the Workshop on 3D Structure from Multiple Images of Lar- scale Environments (SMILE). This workshop was held in conjunction with the Fifth European Conference on Computer Vision 1998 in Freiburg, Germany. SMILE was a joint e ort of the European ACTS projects VANGUARD and PANORAMA and the Esprit projectCUMULI, all of which are involved in the analysis and reconstruction of 3D scenes from image sequences. The potential for 3D reconstructions of scenes and objects is tremendous. Much of the work reported here is to be seen especially against the background of a convergence between computer vision and computer graphics, and of a shift from signal-based to content-based image analysis in telecommunications. - cordingly,the requirementsfor 3D modelsand acquisitionsystemsarealso shi- ing. Visualization rather than mensuration is the primary issue. The perceptual qualityofthe models,the'exibility ofthe acquisition,andthe costofthe system are three driving forces in the search for new methods. The last few years have seen important steps toward genuine ?exibility. A case in point is the use of multiple images to generate 3D models, without an explicit knowledgeof the relativeposition of the camerasor the camera settings. The same developments also hold good promise to make 3D acquisition cheaper and more widely available.