论文标题
RIS辅助的无细胞网络的能源效率最大化，回程有限
Energy Efficiency Maximization in RIS-Aided Cell-Free Network with Limited Backhaul
论文作者
论文摘要
将可重构的智能表面集成到无单元格（RIS-CF）网络中是一种有效的解决方案，可以提高低成本和功耗的未来无线系统的容量和覆盖范围。可以对RIS的反射系数进行编程，以增强用户接收的信号。这封信介绍了在接入点发射光束器的联合设计，并在RISS处反映系数，以最大程度地提高RIS-CF网络的能效（EE），并考虑到有限的回程容量约束。由于一个非常具有挑战性的非凸问题，我们为其解决方案开发了一种简单而有效的交替下降算法。数值结果验证了RIS-CF网络的EE大大改善，显示了使用RISS的好处。
Integrating the reconfigurable intelligent surface in a cell-free (RIS-CF) network is an effective solution to improve the capacity and coverage of future wireless systems with low cost and power consumption. The reflecting coefficients of RISs can be programmed to enhance signals received at users. This letter addresses a joint design of transmit beamformers at access points and reflecting coefficients at RISs to maximize the energy efficiency (EE) of RIS-CF networks, taking into account the limited backhaul capacity constraints. Due to a very computationally challenging nonconvex problem, we develop a simple yet efficient alternating descent algorithm for its solution. Numerical results verify that the EE of RIS-CF networks is greatly improved, showing the benefit of using RISs.
