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IEEE 79th Vehicular Technology Conference (VTC-Spring)

作者： Duc Hiep Vu Van Bien Pham Xuan Nam Tran Chi Hieu Ta Le Quy Don Tech Univ Cau Giay Ha Noi Vietnam

ISBN: (纸本)9781479944828

This paper presents a design of two-way two-hop relay network using physical layer network coding (PNC) in which multiple antennas are used at all nodes. For transmission over the multiple-input multiple-output channels, the Alamouti's space-time block code (STBC) is used for transmission while linear detection is used for signal estimation at all nodes. In order to facilitate linear detection, we develop an equivalent multiuser STBC model for the proposed network and design the sum-and-difference matrix which is suitable for signal estimation. Simulation results show that the proposed network achieves diversity order 2 with polynomial complexity.

关键词： MIMO communication antenna arrays computational complexity matrix algebra network coding relay networks (telecommunication) signal processing space-time block codes Alamouti space-time block code MIMO channels PNC diversity order 2 equivalent multiuser STBC model linear detection multiple antennas multiple-input multiple-output channels physical layer network coding polynomial complexity signal estimation sum-and-difference matrix two-way two-hop relay network design Antennas Estimation MIMO network coding Relay networks (telecommunications) Vectors linear detection network coding Signal estimation space time block coding multiple antenna PNC MIMO communication matrix algebra Antenna arrays multiple input multiple output systems ANTENNA signal processing complexity classes Relay networks

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Wiretap resisting and privacy preserving data exchange with physical layer security and blockchain based authentication in Internet of Vehicles

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MICROPROCESSORS AND MICROSYSTEMS 2024年 104卷

作者： Liu, Qiao Han, Qi Luo, Guangze Cao, Jin Li, Hui Wang, Yong Xidian Univ Sch Cyber Engn Xian Shaanxi Peoples R China Xidian Univ State Key Lab ISN Xian Shaanxi Peoples R China Xian Inst Appl Opt Xian Peoples R China

With the development of automobile industry technology, vehicles have greatly affected everyday life, work and other aspects. With the continuous innovation of sensor technology, computer technology, wireless communication technology, and GPS technology, the concept of Inter of Vehicles (IoV) has been widely regarded as the core technology to solve a series of problems. However, as a complexity network with multiple elements including people, vehicle, base-station and so on, IoV is confronted with security threatened. In this paper, secure data exchange has been considered for two authenticated On Board Units (OBUs) with help of Road Side Unit (RSU). Blockchain based authentication and physical layer security have been applied into IoV for wiretap resisting and privacy preserving data exchange. For wiretap resisting, two synchronized transmitted signals from OBUs act as artificial noise at eavesdropper. In addition, for privacy preserving, summed codeword is formed at RSU which cannot be recovered individually. Finally, simulation results have been conducted to demonstrate that the proposed protocol can achieve transmission efficiency as well as informatics security.

关键词： Vehicle to Vehicle Blockchain based authentication physical layer network coding Wiretap resisting Privacy preserving

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Improving the security of NOMA cognitive networks

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physical COMMUNICATION 2024年 67卷

作者： Li, Enyu Zheng, Meijuan Liang, Zanyang Wang, Ye Wang, Haoming Qingdao Univ Technol Sch Informat & Control Engn Qingdao 266520 Peoples R China

Aiming at the scenario where the eavesdropper try to eavesdrop on the confidential messages of secondary trusted users, two physical-layer network coding (PNC) strategies, namely dual power superposition (PS-PS) encoding strategy and bit-level exclusive-or power superposition (XOR-PS) encoding strategy, are proposed to improve the security performance of cognitive non-orthogonal multiple access (NOMA) networks with the help of the data transmitted by the primary user. Considering the overlay spectrum sharing mechanism and the imperfect successive interference cancellation (SIC) technology, we first derive the closed-form accurate expressions of the outage probability and intercept probability of the secondary network with these two schemes over Rayleigh fading, and also give the asymptotic outage probability in the high signal-to-noise ratio (SNR) regime. Then, the correctness of the theoretical results is verified by simulation. For comparison, we also use the scheme without the assistance of the primary user as the benchmark scheme, which is represented by NPS. Finally, the simulation results show that the security of the proposed PS-PS and XOR-PS schemes is much better than that of the NPS scheme in the case of without reducing the outage performance.

关键词： Non-orthogonal multiple access Successive interference cancellation physical layer network coding Bit-level XOR Outage probability Intercept probability

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Backscatter Assisted NOMA-PLNC Based Wireless networks

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SENSORS 2021年第22期21卷 7589-7589页

作者： Rajkumar, Samikkannu Jayakody, Dushantha Nalin K. Sch Engn Ctr Telecommunicat Res Sri Lanka Technological Campus Padukka 10500 Sri Lanka Natl Res Tomsk Polytechn Univ Sch Comp Sci & Robot Tomsk 634050 Russia

In this paper, sum capacity maximization of the non-orthogonal multiple access (NOMA)-based wireless network is studied in the presence of ambient backscattering (ABS). Assuming that ABS is located next to far nodes, it improves the signal strength of far node cluster. By applying suitable successive interference cancellation (SIC) operation, far node cluster act as an internet of things (IoT) reader. Moreover, to improve the uplink performance of the nodes, a physical layer network coding (PLNC) scheme is applied in the proposed network. Power optimization is employed at the access point (AP) to enhance the downlink performance with total transmit power constraint and minimum data rate requirement per user constraint using Lagrangian's function. In addition, end-to-end outage performance of the proposed wireless network is analyzed to enhance each wireless link capacity. Numerical results evident that the outage performance of the proposed network is significantly improved while using the ABS. Furthermore, the average bit error rate (BER) performance of the proposed wireless network is studied to improve the reliability. Simulation results are presented to validate the analytical expressions.

关键词： non-orthogonal multiple access physical layer network coding ambient backscattering

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Hierarchical Data Decision Aided 2-Source BPSK H-MAC Channel Phase Estimator with Feed-Back Gradient Solver for WPNC networks and Its Equivalent Model

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INFORMATION 2019年第2期10卷 40页

作者： Sykora, Jan Czech Tech Univ Dept Radio Engn Prague 16627 6 Czech Republic

This paper focuses on the channel state estimation (CSE) problem in parametrized Hierarchical MAC (H-MAC) stage in Wireless physical layer network coding (WPNC) networks with Hierarchical Decode and Forward (HDF) relay strategy. We derive a non-pilot based H-MAC channel phase estimator for 2 BPSK alphabet sources. The CSE is aided only by the knowledge of H-data decisions. At HDF relay, there is no information on individual source symbols available. The estimator is obtained by a marginalization over the hierarchical dispersion. The estimator uses a gradient additive update solver and the indicator function (gradient) is derived in exact closed form and in approximations for low and high SNR. We analyze the properties of the equivalent solver model, particularly the equivalent gradient detector characteristics and its main stable domain properties, and also the detector gain and equivalent noise properties under a variety of channel parameterization scenarios.

关键词： physical layer network coding phase estimation feed-back solver

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Multiple Packet Reception in Asynchronous Wireless networks

Multiple Packet Reception in Asynchronous Wireless Networks

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International Conference on Computing, networking and Communications (ICNC)

作者： Argyriou, Antonios Univ Thessaly Dept Comp & Commun Engn Volos 38221 Greece

ISBN: (纸本)9781467300094;9781467352871

In this paper we present a scheme for multiple-packet reception (MPR) that allows the concurrent packet transmission from several asynchronous users and is based on a new algorithm for successive interference cancellation (SIC). Transmitted signals are superimposed at the destination nodes and also at a relay node. The system model allows for the transmitted packets to be superimposed asynchronously with an arbitrary pattern at each node that receives them. For the final version of the proposed scheme we present a joint MPR and channel decoding algorithm.

关键词： Wireless networks cooperative systems multiple packet reception physical layer network coding successive interference cancelation

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Joint physical network coding and Destination Aided Cooperative Jamming for Secure Wireless Sensor networks

Joint Physical Network Coding and Destination Aided Cooperat...

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IEEE Vehicular Technology Conference

作者： Dehuai Li Xiguang Zhang Yong Shang School of Electrical Engineering and Computer Science Peking University

ISBN: (纸本)9781509016990

In this paper, we investigate physical layer network coding (PNC) and destination assisted cooperative jamming (DACJ) for physical layer security in wireless sensor networks, in which there is one source, one destination, a cluster of intermediate nodes, and multiple eavesdroppers. Under the PNC protocol, the considered two-hop wireless sensor network implements a complete transmission process in two phases. In the first phase, through sending a jamming signal from the destination and exploiting the PNC at the relay, the relay decodes the exclusive-OR (XOR) performed form of the source and the jamming message. Therefore, the jamming signal can degrade the wire-tap channels without hampering the legitimate channel. In the second phase, the relay transmits the re-encoded message to the destination while eavesdroppers are out of work as they cannot extract information from the signal. Thus, the proposed design can significantly improve the performance of secure wireless communications. Meanwhile, the proposed schemes select one optimal node from the intermediate nodes and give an optimal solution of power allocation to maximize secrecy capacity. Numerical simulation results show that the proposed schemes have a better and more stable secrecy performance than the conventional schemes at the same power consumption.

关键词： Wireless sensor networks physical layer security physical layer network coding Destination assisted cooperative jamming Wireless sensor networks destination physical layer intermediate node cooperative jamming exclusive OR CARRIER SYSTEM PNC interfering signal Power consumption physical network

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Ergodic Rate Analysis of Power Allocation Schemes in Two-way Decode-and-Forward Relay Systems

Ergodic Rate Analysis of Power Allocation Schemes in Two-way...

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IEEE Vehicular Technology Conference

作者： Chen Chen Yehua Yang Lin Bai Ye Jin Jinho Choi State Key Laboratory of Advanced Optical Communication Systems and Networks Peking University Beijing China School of Electronic and Information Engineering Beihang University Beijing China School of Information and Communications Gwangju Institute of Science and Technology (GIST) Korea

ISBN: (纸本)9781479980925

Most previous researches on the rate analysis of the power allocation (PA) schemes in two-way decode-and-forward (DF) relay systems typically focus on maximizing the instantaneous objective rates. However, the ergodic rate analysis of the optimized rates is not well considered. In this paper, we investigate the ergodic rates of the PA schemes in a two-way DF relay system, where the physical-layer network coding (PNC) protocol is adopted. Specifically, under a total power constraint, we consider three heuristic PA schemes, in which the optimization objectives are: 1) maximizing the sum rate;2) maximizing the sum rate with an additional rate fairness constraint;and 3) maximizing the minor rate of the two directions of the system. The cumulative distribution functions (CDFs) of the equivalent system SNR are approximately obtained and the analytical expressions for the calculations of the ergodic rates are theoretically derived. Numerical results show that the derived analytical rates are converged to the simulated results in high SNR regions.

关键词： Two-way relay system physical layer network coding power allocation ergodic rate power splitting Relay systems Bidirectional Nylons Scheme

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physical layer network-coded MAC strategy

Physical layer network-coded MAC strategy

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International Conference on Cyberspace Technology (CCT 2014)

作者： Yu Zhang Ge Xiong School of Computer and Communication Engineering University of Science and Technology Beijing 100083 China School of Software Beihang University 100191 China

ISBN: (纸本)9781510802704

This paper introduces physical layer network coding into multiple access system and then proposes a physical layer network coded MAC strategy (PNC-MAC). The detail steps of the PNC-MAC are presented. To show the performance of the algorithm, we compare the throughput and average delay induced by the new algorithm with that by modified ALOHA strategy and tree algorithm via simulations. The results showed that when operated with our proposed PNC-MAC, multiple access system can achieve a larger throughput while the frames bear shorter average delay. Besides, in many users case, the throughput increases slightly while the average delay ascends drastically.

关键词： ALOHA strategy Medium access control physical layer network coding Tree algorithm Medium access control mean delay physical layer Multi access systems hierarchical network Throughput MAXIMUM ACCEPTABLE CONTAMINATION Media Access Protocol

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DFE FOR FREQUENCY SELECTIVE PNC CHANNELS USING AF

DFE FOR FREQUENCY SELECTIVE PNC CHANNELS USING AF

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IEEE International Conference on Wireless and Mobile Computing, networking and Communications

作者： Alaa H. Ahmed Charalampos C. Tsimenidis Jeffrey Neasham Bayan S. Sharif Newcastle University School of Electrical and Electronic Engineering Newcastle upon Tyne NE1 7RU England UK

ISBN: (纸本)9781467377027

High speed transmission of information suffers inevitably by intersymbol interference (ISI) induced by multipath propagation over frequency selective channels. ISI has been a major obstacle preventing the successful implementation of physical layer network coding (PLNC) systems in these environments. Another major obstacle is the high computational complexity of existing algorithms dealing with ISI, which is a determining factor in the design of relay nodes. In this paper, we propose a novel and computationally efficient decision feedback equalizer structure that is utilized at the end node and in conjunction with a simple amplify and forward (AF) technique employed at the relay. We derive the optimal equations for the decision feedback equalizer (DFE) coefficients and evaluate the end-to-end bit error rate performance in frequency selective channels, and provide both analytical and numerical simulation results that demonstrate the feasibility of the proposed approach under realistic channel conditions. The obtained results show that E2E performance is dominated by the channel with most severe frequency selectivity.

关键词： physical layer network coding frequency selective channels amplify and forward decision feedback equalizer

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