Efficient Beamforming and Radiation Pattern Control Using Stacked Intelligent Metasurfaces

Date: 2024.02.26 14:14
Author: Joffrey LC

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Efficient Beamforming and Radiation Pattern Control Using Stacked Intelligent Metasurfaces. Naveed Ul Hassan et.al. IEEE Open Journal of the Communications Society, 2024 (pdf) (Citations 0)

Quick Overview

• continuous phase shift: gradient ascent algorithm
• discrete phase shift: AO-based algorithm

The contribution of this paper:

• a general path-loss model for SIM-assisted wireless communication systems.
• continuous and discrete phase shift model

惠更斯原理：

在波的传播过程中，波阵面上的每一点都可看作是发射子波的波源，在其后的任意时刻，这些子波的包迹就成为新的波阵面.

一个奇怪的现象是，随着SIM层数的增多，连续相移下，性能反而变差？离散值情况下没有出现减小的问题。作者留作future work了。

Channel model/Path-loss model

channel model:

pathloss model:

Solution

gradient-based algorithm: 梯度下降法

AO-based algorithm: 固定一个原子进行迭代（离散才行，连续计算量太大了）

Simulation

continuous

discrete