论文标题
多射线辅助3D安全精确无线传输
Multi-RIS Aided 3D Secure Precise Wireless Transmission
论文作者
论文摘要
在本文中，在三维（3D）无线通信方案中提出了多个可重构智能表面（RIS）辅助精确无线传输（SPWT）方案。当直接路径被障碍物阻塞时，请考虑从发射器到接收器的直接路径通道。然后，将多个RIS通过发射器，RIS和接收器之间的反射路径实现SPWT，以同时提高通信性能和能源效率。首先，在单个用户方案中提出了最大信号与噪声比率（MSINR）方案。然后，将多用户方案视为非法用户被视为窃听者的情况。提出了最大秒速率率（MSR）方案和最大信号与透明率和噪声比率（MSLNR）。前者取得更好的保密率（SR）性能，但复杂性更高。后者的复杂性低于SR性能损失的MSR方案。仿真结果表明，单用户方案和多用户方案都可以实现SPWT，从而将机密消息精确地传输到所需用户的位置。此外，MSLNR方案的复杂性低于MSR方案，而SR性能接近MSR方案。
In this paper, multiple reconfigurable intelligent surfaces (RIS) aided secure precise wireless transmission (SPWT) schemes are proposed in the three-dimensional (3D) wireless communication scenario. Unavailable direct path channels from transmitter to receivers are considered when the direct paths are obstructed by obstacles. Then, multiple RISs are utilized to achieve SPWT through the reflection path among transmitter, RISs and receivers in order to enhance the communication performance and energy efficiency simultaneously. First, a maximum-signal-to-interference-and-noise ratio (MSINR) scheme is proposed in a single user scenario. Then, the multi-user scenario is considered where the illegitimate users are regarded as eavesdroppers. A maximum-secrecy-rate (MSR) scheme and a maximum-signal-to-leakage-and-noise ratio (MSLNR) are proposed. The former achieves a better secrecy rate (SR) performance but incurs a higher complexity. The latter has a lower complexity than the MSR scheme with an SR performance loss. Simulation results show that both single-user scheme and multi-user scheme can achieve SPWT which transmits confidential message precisely to location of desired users. Moreover, MSLNR scheme has a lower complexity than the MSR scheme, while the SR performance is close to that of the MSR scheme.
