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Yanshi Sun - IEEE Xplore Author Profile

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Information security in wireless communication is imperative for emerging applications. In the field of physical layer security, power-domain and coding-domain schemes are implemented to ensure the confidentiality. However, existing methods enhance system security based on information theory, neglecting the potential in modulation process. To this end, this letter proposes a modulation-domain wave...Show More
Hybrid non-orthogonal multiple access (NOMA), which organically combines pure NOMA and conventional OMA, has recently received significant attention to be a promising multiple access framework for future wireless communication networks. However, most of the literatures on hybrid NOMA only consider fixed order of successive interference cancellation (SIC), namely FSIC, for the NOMA transmission pha...Show More
This paper studies the application of cognitive radio inspired non-orthogonal multiple access (CR-NOMA) to reduce age of information (AoI) for uplink transmission. In particular, a time division multiple access (TDMA) based legacy network is considered, where each user is allocated with a dedicated time slot to transmit its status update information. The CR-NOMA is implemented as an add-on to the ...Show More
Vehicle-to-infrastructure (V2I) network is a new paradigm of wireless system with special topology where roadside units (RSUs) are linearly deployed along the roadside and vehicles linearly move on the road. For such system, some classical problems would have new formulations and solutions. We in this paper investigate the joint power control and user scheduling problem for a multi-cell downlink V...Show More
In advanced vehicular networks, Roadside Unit (RSU)-based amplify-and-forward (AF) relay and passive Reconfigurable Intelligent Surface (RIS) are two potential helpers to enhance the vehicle-to-vehicle (V2V) communications when the direct link experiences poor quality. This paper presents a comprehensive comparison of the two enhancement modes from the outage performance perspective. In the presen...Show More
Orthogonal Time Frequency Space (OTFS) is an emerging modulation technique designed for high-speed mobile communication environments, which can effectively process signals in the delay-Doppler domain. However, OTFS faces some challenges in practice. One challenge which is emergent to address is the low robustness and high complexity of the existing signal detection methods. To this end, this paper...Show More
This paper aims to study the role of cognitive radio inspired non-orthogonal multiple access (CR-NOMA) in improving information freshness of status updating systems with random arrivals. Particularly, a time slotted multiuser scenario is considered, where each user transmits its status update to a receiver. Each user is allocated with a time slot. In CR-NOMA, each user can transmit signal as a pri...Show More
We propose a hybrid beamforming architecture for near-field reconfigurable holographic surfaces (RHS) harnessed in cell-free networks. Specifically, the holographic beamformer of each base station (BS) is designed for maximizing the channel gain based on the local channel state information (CSI). By contrast, the digital beamformer at the central processing unit is designed based on the minimum me...Show More
Reconfigurable holographic surfaces (RHSs) constitute a promising technique of supporting energy-efficient communications. In this paper, we formulate the energy efficiency maximization problem of the switch-controlled RHS-aided beamforming architecture by alternately optimizing the holographic beamformer at the RHS, the digital beamformer, the total transmit power and the power sharing ratio of e...Show More
An intelligent omni-surface (IOS) assisted holographic multiple-input and multiple-output architecture is conceived for $360^\circ$ full-space coverage at a low energy consumption. The theoretical ergodic rate lower bound of our non-orthogonal multiple access (NOMA) scheme is derived based on the moment matching approximation method, while considering the signal distortion at transceivers imposed ...Show More
The aim of this paper is to reveal the importance of hybrid successive interference cancellation (SIC) and power adaptation (PA) for improving transmission robustness of uplink non-orthogonal multiple access (NOMA). Particularly, a cognitive radio inspired uplink NOMA communication scenario is considered, where one primary user is allocated one dedicated resource block, while $M$ secondary users...Show More
This article investigates the performance of network non-orthogonal multiple access (N-NOMA) in a downlink coordinated multi-point (CoMP) system. In the considered N-NOMA scheme, multiple base stations (BSs) cooperatively serve a CoMP user, meanwhile, each BS serves additional NOMA users by occupying the same resource block allocated to the CoMP user. The locations of the BSs and users are modeled...Show More
The application of network non-orthogonal multiple access (N-NOMA) technique to coordinated multi-point (CoMP) systems has attracted significant attention due to its superior capability to improve connectivity and maintain reliable transmission for CoMP users simultaneously. Based on the concept of quasi-degraded channel for N-NOMA, this paper studies the precoding design for downlink N-NOMA scena...Show More
This paper proposes a target tracking algorithm that combines kernelized correlation filter (KCF) and Kalman filter (KF) prediction to address the problem of poor tracking performance or even failure in target tracking when the target is occluded. This article uses peak sidelobe ratio to determine whether the target is occluded. When the target is unobstructed or partially occluded, the learning r...Show More
This paper considers a cognitive radio inspired uplink communication scenario, where one primary user is allocated with one dedicated resource block, while $M$ secondary users compete with each other to opportunistically access the primary user's channel. Two new designs of NOMA schemes, namely hybrid successive interference cancellation with power adaptation (HSIC-PA) and fixed successive interfe...Show More
The safety performance of civil aircraft is closely related to the reliability of aircraft slat mechanism, and the slat failures of civil aircraft have been occurring continuously in recent years. The design of aircraft slats has a great impact on the resistance during flight. The relative chord displacement of slats and main wings cannot be ignored, which has a great impact on aircraft resistance...Show More
The aim of this paper is to present a groundwork on the delay-minimized routing problem in a vehicular ad-hoc network (VANET) where some of the vehicles are equipped with full-duplex (FD) radios. We first give the generalized delay calculation model for a multi-hop path, and prove that the Dijkstra algorithm is unable to get the delay-minimized routing path from source to destination. Then we prop...Show More
Reconfigurable intelligent surfaces (RIS) are capable of beneficially ameliorating the propagation environment by appropriately controlling the passive reflecting elements. To extend the coverage area, the concept of simultaneous transmitting and reflecting reconfigurable intelligent surfaces (STAR-RIS) has been proposed, yielding supporting 360° coverage user equipment (UE) located on both sides ...Show More
Recently, stochastic geometry has been applied to provide tractable performance analysis for low earth orbit (LEO) satellite networks. However, existing works mainly focus on analyzing the “coverage probability”, which provides limited information. To provide more insights, this letter provides a more fine grained analysis on LEO satellite networks modeled by a homogeneous Poisson point process (H...Show More
With the ability of enhancing desired signals, Reconfigurable Intelligent Surface (RIS) is expected to be applied to vehicular networks which require ultra-reliable communications. In this letter we propose a promising RIS-assisted vehicle-to-infrastructure (V2I) network model in highway environment. Then under Rayleigh fading channels, our goal is to derive the downlink outage probability (OP) of...Show More
Full-duplex (FD) radio, which enables co-time co-channel receiving and forwarding at one device, is expected to be leveraged to improve the relay efficiency of multi-hop inter-vehicle communications. This paper considers a vehicular ad-hoc network (VANET) with some of the vehicles being FD enabled. We first present the new calculation model of the end-to-end delay, and then prove that the Dijkstra...Show More
This paper studies the application of network non-orthogonal multiple access (N-NOMA) to vehicular communication networks, modeled by a Poisson line Cox point process (PLC). Particularly, the road infrastructure is modeled by a Poisson line point process (PLP), whereas base stations (BSs) and users are located according to 1D homogeneous Poisson point processes (HPPPs) on each road. In the conside...Show More
Efficiency of cellular-connected UAVs is challenged by spectrum inefficiency, limited number of concurrent connectivity, and strong interference. To overcome these issues, in this paper, we study the performance of downlink non-orthogonal multiple access for cellular-connected UAVs. We develop a novel framework based on stochastic geometry for the co-existence of aerial users (AUs) and terrestrial...Show More
Conventionally, it was thought that outage probability error floors are unavoidable in uplink non-orthogonal multiple access (NOMA) regardless which type of successive interference cancellation (SIC) is adopted. However, a recent work breaks such myths by introducing the concept of hybrid SIC, which dynamically chooses the decoding order according to the users’ channel conditions and quality of se...Show More
Connecting aerial users (AU)s to cellular networks expands the potential of many applications. Nevertheless, existing cellular networks are not designed to efficiently serve AUs and terrestrial users (TU)s. Limited spectrum and high interference make the task even more challenging. Thus, in this paper, we examine the feasibility of fixed-power non-orthogonal multiple access (NOMA) scheme in meetin...Show More