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Sparse Representation Based Range-Doppler Processing for Integrated OFDM Radar-Communication Networks
Published 2017-01-01Get full text
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Federal Deep Learning Approach of Intrusion Detection System for In-Vehicle Communication Network Security
Published 2025-01-01Get full text
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User Access Control and Authentication System for VoIP Service in Mobile Communication Environments
Published 2014-02-01Get full text
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Choice of cooperation model of the logistics department with other departments of an importing company
Published 2018-03-01“…Among the measures proposed are spreading of the logistics principles on the activity of all divisions of the company, better distribution of the tasks relating to the generation of material flow parameters between the logistics department and the sales department of an importing company, regulating of business processes in logistics and wider deployment of the information technologies in the business communication.…”
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IEEE 802.15.7-Compliant Full Duplex Visible Light Communication: Interference Analysis and Experimentation
Published 2024-01-01“…In particular, the study delves into implementing both full-duplex and half-duplex communication schemes using FPGA technology for vehicular communications compliant to the IEEE 802.15.7 standard. …”
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Design of OFDM-IM system based on IRS-assisted
Published 2023-07-01“…Index modulation (IM) and intelligent reflecting surface (IRS) are emerging mobile communication technologies.In order to improve the reliability of traditional orthogonal frequency division multiplexing (OFDM) system, an orthogonal frequency division multiplexing with index modulation (OFDM-IM) system based on IRS-assisted was designed.Firstly, the OFDM-IM system was designed by using spatial modulation and frequency domain modulation to increase the Euclidean distance between subcarriers.Then, by establishing an equivalent circuit model, a practical IRS model was obtained.Finally, an alternating optimization algorithm was used to optimize the active transmission power of the access point (AP) and passive beamforming of the IRS jointly.The simulation results show that compared to the benchmark scheme, the symbol error rate (SER) or bit error rate (BER) of the OFDM-IM system based on IRS-assisted can be reduced by 60%~90%.Especially in the case of high signal-to-noise ratio, the SER or BER of the system can reach 1.0×10<sup>-6</sup>, which indicates that the introduction of IM and IRS technologies has optimized the link transmission quality of end-to-end communication system.In addition, based on the IRS-assisted OFDM-IM system as the standard, simulations are conducted to demonstrate the impact of various parameters from the IRS model and IM.It concludes that the parameters in the system should be selected reasonably according to channel state information (CSI).…”
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The Explanation of Urban System Transformations in the Tehran\'s megalopolis region
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Formation of digital literacy components of future teachers in the course of studying the university-wide discipline “Digital Technologies in Education”
Published 2024-12-01“…At the stage of diagnostics and assessment of the formation of digital literacy of bachelors, an original test is used, aimed at identifying the level of formation of five components of digital literacy of future teachers: information, computer, communication and media literacy, as well as attitudes towards technological innovations. …”
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A New Physical Layer Security Scheme Based on Adaptive Bit Channel Selection for Polar-Coded OFDM
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Joint Adaptive OFDM and Reinforcement Learning Design for Autonomous Vehicles: Leveraging Age of Updates
Published 2025-01-01Get full text
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Hierarchical proxy consensus optimization for IoV based on blockchain and trust value
Published 2022-06-01“…With the rapid development of Internet of vehicles, 5G and artificial intelligence technologies, intelligent transportation has become the development trend of transportation technology.As a vehicle-vehicle and vehicle-road information interaction platform, the Internet of vehicles is the basic support platform for intelligent traffic information sharing and processing.At the same time, the security of Internet of vehicles has attracted much attention, especially data security which may cause user privacy leakage.The blockchain technology has become a solution, but it still faces new challenges in efficiency, security and other aspects.With the increase of vehicle nodes and information, how to efficiently achieve information consensus in high-speed vehicle moving environment has become a key problem.Then a bottom-up RSU (road side unit) chain consensus protocol was proposed based on blockchain and trust value.Several typical consensus structures were compared, and bottom-up two-layer consensus structure was adopted according to the actual scenarios of the Internet of vehicles.Moreover, a group leader node election algorithm was proposed which is based on node participation, work completion and message value.The system security was ensured by assigning trust value to each vehicle.Following the consensus structure and algorithm work mentioned above, the specific process of the protocol was comprehensively described, which was divided into six steps: region division, group leader node selection, local consensus, leader primary node selection, global consensus, and intra-domain broadcast.Then the experiments were analyzed from four aspects: security, communication complexity, consensus algorithm delay and fault tolerance rate.Experiments showed that, compared with other schemes, the proposed protocol can effectively reduce communication complexity and shorten consensus delay under the condition of resisting conspiracy attack, witch attack and other attacks.On the premise of security, the protocol improves fault tolerance rate and enables more nodes to participate in information sharing to satisfy the requirements of Internet of vehicles scenarios.…”
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