In this paper, intelligent reflecting surface (IRS) is introduced to enhance the network performance of cognitive radio (CR) systems. Specifically, we investigate robust beamforming design based on both bounded channel state information (CSI) error model and statistical CSI for primary user (PU)-related channels in IRS-aided CR We jointly optimize transmit precoding (TPC) at secondary (SU) tran...

This manuscript presents an energy-efficient alternating optimization framework based on intelligent reflective surfaces (IRS) aided non-orthogonal multiple access beamforming (NOMA-BF) system for 6G wireless communications. Specifically, this work proposes a centralized IRS-enabled design the NOMA-BF to optimize active and power allocation coefficient (PAC) of users at transmitter in first sta...

The joint resource block (RB) allocation and power optimization problem is studied to maximize the sum-rate of vehicle-to-vehicle (V2V) links in device-to-device (D2D)-enabled V2V communication system, where one feasible cellular user (FCU) can share its RB with multiple pairs. first formulated as a nonconvex mixed-integer nonlinear programming (MINLP) constraint maximum interference FCU links....

This paper proposes a constrained stochastic successive convex approximation (CSSCA) algorithm to find a stationary point for a general non-convex stochastic optimization problem, whose objective and constraint functions are nonconvex and involve expectations over random states. The existing methods for non-convex stochastic optimization, such as the stochastic (average) gradient and stochastic...

In this letter, secure beamforming in a multiple intelligent reflecting surfaces (IRSs)-aided millimeter-wave (mmWave) system is investigated. system, the secrecy rate maximized by controlling on-off status of each IRS as well optimizing phase shift matrix IRSs. This problem posed joint optimization transmit and control, whose goal to maximize under total transmission power unit-modulus constra...

Integrated access and backhaul (IAB) network is envisioned as a novel architecture for increasing the capacity coverage. To facilitate IAB network, appropriate methods of wireless link association resource management are required. In this paper, we investigate joint optimization problem allocation in terms subchannel power network. particular, handle problems links considering multi-hop backhau...

Integrated Sensing and Communications (ISAC) technology can jointly design radio sensing communication functionalities, which enable 6G Ere to have the ability “see” physical world rather than communication-only. Benefitting from ISAC, vehicular-to-everything (V2X) networks may efficiently complete high-precision traffic environment perception. Furthermore, with assistance of flex...

Abstract Aiming at high energy consumption and information security problem in the simultaneous wireless power transfer (SWIPT) multi-user wiretap network, we propose a user-aided cooperative non-orthogonal multiple access (NOMA) physical layer transmission scheme to minimize base station (BS) transmitted this paper. In scheme, user near from BS is adopted as friendly relay improve performance ...

As two promising paradigms in next generation cellular systems, service function chaining (SFC) and mobile edge computing (MEC) have attracted great interests, would bring more delay-sensitive services to users proximity. Nevertheless, owing time-varying channel conditions finite server resources, the SFC deployment networks is nontrivial. In this work, leveraging both coordinated multiple poin...

Secure wireless information and power transfer based on directional modulation is conceived for amplify-andforward (AF) relaying networks. Explicitly, we first formulate a secrecy rate maximization (SRM) problem, which can be decomposed into a twin-level optimization problem and solved by a one-dimensional (1D) search and semidefinite relaxation (SDR) technique. Then in order to reduce the sear...