We consider a smart radio environment where meta-surfaces are employed to improve the performance of wireless networks working at sub-THz frequencies. To this end, we propose a comprehensive mathematical channel model, taking into account both the ability of the meta-surfaces to redirect the impinging signal towards a desired direction, and the signal reflection due to large objects. We show how the design of both the meta-surface and the transmitter precoder influences the network throughput. Furthermore, we compare several algorithms to optimize the effect of the meta-surfaces in a realistic scenario. As a result, a simpler algorithm that associates network users and meta-surfaces provides a performance comparable to more complex numerical optimization methods. Simulation results suggest how many users are supported in the designed system.
翻译:我们考虑一个智能的无线电环境,使用元表层来改进在次HHz频率工作的无线网络的性能。为此,我们提议一个全面的数学频道模型,既考虑到元表层将断层信号转向预期方向的能力,又考虑到大型物体造成的信号反射。我们展示了元表层和发射机前编码器的设计如何影响网络的吞吐。此外,我们比较了几种算法,以在现实情况下优化元表层的效果。因此,我们提出了一个更简单的算法,即联系网络用户和元表层用户提供与更复杂的数字优化方法相类似的性能。模拟结果显示在设计系统中有多少用户得到支持。