A novel air-to-ground communication paradigm is conceived, where an unmanned aerial vehicle (UAV)-mounted base station (BS) equipped with multiple antennas sends information to ground users (GUs) the aid of a simultaneously transmitting and reflecting reconfigurable intelligent surface (STAR-RIS). In contrast conventional RIS whose main function reflect incident signals, STAR-RIS capable both i...

This letter investigates physical layer security in intelligent reflecting surface (IRS)-aided VL communication (VLC). Under the point source assumption, we first elaborate system model scenario with multiple legitimate users and one eavesdropper, where secrecy rate maximization problem is transformed into an assignment by objective function approximation. Then, iterative Kuhn-Munkres algorithm...

The fundamental intelligent reflecting surface (IRS) deployment problem is investigated for IRS-assisted networks, where one IRS arranged to be deployed in a specific region assisting the communication between an access point (AP) and multiple users. Specifically, three schemes are considered, namely non-orthogonal (NOMA), frequency division (FDMA), time (TDMA). weighted sum rate maximization j...

The emerging intelligent reflecting surface (IRS) can significantly improve the system capacity, and it has been regarded as a promising technology for beyond fifth-generation (B5G) communications. For IRS-assisted multiple input output (MIMO) systems, accurate channel estimation is critical challenge. This severely restricts practical applications, particularly resource-limited indoor scenario...

This letter investigates a virtual reality (VR) delivery system, where the original VR contents requested by all users are stored at macro base station (MBS). To reduce latency, MBS can either transmit data or computed to multiple aided an intelligent reflecting surface (IRS) prevent attacks from eavesdropper with imperfect channel state information (CSI). We jointly optimize transmission polic...