A5101654848- Wireless Communication Security Techniques
- Advanced Wireless Communication Technologies
- Cooperative Communication and Network Coding
- UAV Applications and Optimization
- Advanced MIMO Systems Optimization
- Direction-of-Arrival Estimation Techniques
- Antenna Design and Optimization
- Full-Duplex Wireless Communications
- Caching and Content Delivery
- Advanced Adaptive Filtering Techniques
- Radar Systems and Signal Processing
- Antenna Design and Analysis
- Electromagnetic Compatibility and Measurements
- Millimeter-Wave Propagation and Modeling
- Adaptive Control of Nonlinear Systems
- Image and Signal Denoising Methods
- Sharing Economy and Platforms
- Advanced Wireless Communication Techniques
- Multi-Criteria Decision Making
- Dysphagia Assessment and Management
- Satellite Communication Systems
- Chaos-based Image/Signal Encryption
- Robotic Mechanisms and Dynamics
- Neural Networks and Reservoir Computing
- Advanced Wireless Network Optimization
Shanghai Ship and Shipping Research Institute
2023-2024
Nanjing University of Science and Technology
2002-2022
In this paper, we make an investigation of robust beamforming for secure directional modulation in the multiuser multiple-input and multiple-output systems presence direction angle measurement errors. When statistical knowledge errors is unavailable, a novel scheme combining main-lobe-integration leakage proposed to simultaneously transmit multiple different independent parallel confidential message streams associated distinct desired users. The includes two steps: designing vectors useful...
In this paper, the problem of content caching in 5G cellular networks relying on social-aware device-to-device communications (DTD) is investigated. Our focus how to efficiently select important users (IUs) and allocate files storage these selected IUs form a distributed system. We aim at proposing novel approach for minimizing downloading latency maximizing social welfare simultaneously. particular, we first model as many-to-one matching game based property mobile users. study by exploiting...
Summary Data on the prevalence of obstructive sleep apnea in subjects with type 2 diabetes mellitus China is scarce. We conducted a multi‐centre, cross‐sectional study involving 12 hospitals from six regional cities to investigate hospitalized patients and explore association between related risk factors, diabetic complications comorbidities China. Each hospital recruited at least 70 consecutive who were admitted endocrinology ward. A total 880 participants enrolled administered overnight...
In order to overcome the inherent latency in multi-user orthogonal multiple access (OMA) unmanned aerial vehicle (UAV) networks. this paper, we investigate a UAV-enabled uplink non-orthogonal (NOMA) network, where UAV is deployed collect messages transmitted by ground users. To maximize users' sum-rate, formulate optimization problem, which deployment position and power control are jointly optimized subject transmission constraints quality of service (QoS) constraints. However, problem mixed...
In this paper, given the beamforming vector of confidential messages and artificial noise (AN) projection matrix total power constraint, a allocation(PA) strategy maximizing secrecy rate (Max-SR) is proposed for secure directional modulation networks. By method Lagrange multiplier, analytical expression PA derived. To confirm benefit from Max SR-based strategy, we take all null-space scheme as an example derive its closed-form optimal strategy. From simulation results, find following facts:...
In the finite blocklength scenario, which is suitable for practical applications, a method of maximizing average effective secrecy rate (AESR) proposed UAV-enabled secure communication by optimizing UAV's trajectory and transmit power subject to mobility constraints constraints. To address formulated non-convex optimization problem, it first decomposed into two subproblems. Then subproblems are converted respectively convex via first-order approximation. Finally, an alternating iteration...
To enhance the sum rate of maximizing signal-to-leakage-and-noise ratio (Max-SLNR), a power allocation (PA) scheme that combines noise and interference whitening, singular value decomposition, water-filling algorithms is proposed for Max-SLNR per user as opposed to antenna users. Simulation shows approach produces higher than with equal PA (EPA). It also better in bit error EPA presence shadow fading receiving correlation.
In the conventional directional modulation (DM) system without relay aiding, when eavesdropper locates within main-beam of desired direction, it can intercept confidential message from source Alice. this paper, we propose a strategy to enhance physical-layer security direction in wireless transmission with help multi-relay cooperation. scenario, messages are forwarded destination receiver, and artificial noise (AN) is enforced eavesdroppers aid multi-relays such that not successfully recover...
Medium-scale or large-scale receive antenna array with digital beamforming can be employed at receiver to make a significant interference reduction but leads expensive cost and high complexity of the RF-chain circuit. To deal this issue, classic analog-and-digital (ADB) structure was proposed in literature for greatly reducing number RF-chains. Based on ADB structure, paper, we propose robust hybrid scheme resist directions arrival (DOAs) estimation errors. The key idea our is employ null...
In this letter, we propose an auction-based resource trading scheme between a network service provider (NSP) and multiple content providers (CPs). The NSP is in charge of number small-cell base stations (SBSs), while each CP provides downloading services to its affiliated mobile users (MUs). By treating the SBSs as kind resources, leases CPs for caching their popular contents, thereby reducing latency MUs. We first establish utility functions CPs. Then, maximize utilities both sides by...
In offline actor–critic (AC) algorithms, the distributional shift between training data and target policy causes optimistic <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$Q$</tex-math> </inline-formula> value estimates for out-of-distribution (OOD) actions. This leads to learned policies skewed toward OOD actions with falsely high values. The existing value-regularized AC algorithms address this issue by...
We propose a neural predictor-based dynamic surface parallel control method for class of uncertain nonlinear systems in this brief. The dynamics the physical system is strict-feedback form and subject to multi-input, multi-output, nonlinearities. developed based on an ACP methodology, including three steps. Firstly, artificial using echo state network-based predictor structure. Next, high-order tuner-based computational experiment achieve online adaptive training network. Finally, execution...
OFDM data detection in doubly-selective fading channels requires high complexity due to intercarrier interferences (ICI). We present a low-complexity receiver consisting of semidefinite relaxation (SDR) based detector and parallel interference cancellation (PIC). The entire band is divided into clusters adjacent subcarriers. SDR applied on each cluster while PIC tackles ICI from other clusters. An upper bound power derived used omit far-away performing PIC. Finally, an adaptive PIC,...
In this work, an adaptive and robust null-space projection (AR-NSP) scheme is proposed for secure transmission with artificial noise (AN)-aided directional modulation (DM) in wireless networks. The carried out three steps. Firstly, the directions of arrival (DOAs) signals from desired user eavesdropper are estimated by Root Multiple Signal Classificaiton (Root-MUSIC) algorithm related signal-to-noise ratios (SNRs) based on ratio corresponding eigenvalue to minimum covariance matrix received...
In this paper, we make an investigation on the sum-mean-square-error (Sum-MSE) performance gain in full-duplex orthogonal frequency-division multiplexing (OFDM) systems presence of colored interference-plus-noise (IPN). This is defined as ratio Sum-MSE frequency-domain least-square (LS) channel estimator to that DFT-based LS one. The closed-form formula derived. And, its simple upper and lower bounds are given using inequalities matrix eigenvalues. exact value depends heavily correlation...
The in-phase and quadrature-phase (IQ) imbalances can be present at both the transmitter receiver in OFDM systems lead to system performance degradation. An improved LS based joint channel IQ imbalance estimation scheme is proposed. Simulations show that with only two training symbols per frame could achieve better BER than original compensation using up 32 frame.
With the burst of mobile data, it is necessary to make use idle equipment for caching space. Caching in femto-cells proposed reducing transmission latency between WiFi points and its users (MU) better user service. In this paper, we firstly take copyright files as allocation resource with space want rent these copyrights. We propose a multi-rounds double auction mechanism problem popularity parameter quality weight. This game can help multiple content providers (CP) lease copyrights...
In this paper, given the beamforming vector of confidential messages and artificial noise (AN) projection matrix total power constraint, a allocation (PA) strategy maximizing secrecy rate (Max-SR) is proposed for secure directional modulation (DM) networks. By method Lagrange multiplier, analytic expression PA derived. To confirm benefit from Max-SR-based strategy, we take null-space (NSP) scheme as an example derive its closed-form optimal strategy. From simulation results, find following...