论文标题
通过反射表面的多源大型MIMO的单RF体系结构
A Single-RF Architecture for Multiuser Massive MIMO via Reflecting Surfaces
论文作者
论文摘要
在这项工作中，我们提出了一种新的单RF MIMO体系结构，该体系结构具有很高的可扩展性和能源效率。该提案中的发射器由一个辐射到反射表面的单个RF照明器组成。反射表面上的每个元素在应用相移后重新传输其接收的信号，从而获得了所需的光束形式。对于此架构，波束形成问题被解释为线性回归，并通过最小二乘方法得出解决方案。使用此公式，开发了一种用于调整反射表面的快速迭代算法。数值结果表明，所提出的体系结构与反射表面的当前设计完全兼容。
In this work, we propose a new single-RF MIMO architecture which enjoys high scalability and energy-efficiency. The transmitter in this proposal consists of a single RF illuminator radiating towards a reflecting surface. Each element on the reflecting surface re-transmits its received signal after applying a phase-shift, such that a desired beamforming pattern is obtained. For this architecture, the problem of beamforming is interpreted as linear regression and a solution is derived via the method of least-squares. Using this formulation, a fast iterative algorithm for tuning of the reflecting surface is developed. Numerical results demonstrate that the proposed architecture is fully compatible with current designs of reflecting surfaces.
