Fractional Programming Based Optimization Techniques for RIS-Assisted SWIPT-IoT System

IF 3.7 3区计算机科学 Q2 TELECOMMUNICATIONS

IEEE Communications Letters Pub Date : 2024-10-15 DOI:10.1109/LCOMM.2024.3481289

Neha Sharma;Sumit Gautam;Symeon Chatzinotas;Björn Ottersten

引用次数: 0

Abstract

This letter addresses two distinctly poised objectives, i.e., data rate and energy harvesting (EH) in Simultaneous Wireless Information and Power Transfer (SWIPT) systems with Reconfigurable Intelligent Surface (RIS) by tackling a weighted objective to maximize data rate, EH, and transmit power utilization for multi-antenna BS and multiple RIS-User scenarios. This approach optimizes power splitting (PS) ratio at the end-user and transmit power using an optimized practical phase-dependent amplitude model for each RIS element reflectivity. Fractional programming-based Dinkelbach and Quadratic transform-related algorithms are proposed and compared with Karush-Kuhn-Tucker (KKT) conditions based solutions. Optimized discrete phase shift (DPS) level has been sought. Numerical results show that deploying more RIS elements and placing them closer together enhances both information rate and EH, whereas it nearly saturates with increasing DPS levels.

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基于分数规划的ris辅助swift - iot系统优化技术

这封信解决了两个明显的平衡目标，即数据速率和能量收集（EH）在同步无线信息和电力传输（SWIPT）系统中具有可重构智能表面（RIS），通过处理加权目标来最大化数据速率，EH，以及多天线BS和多个RIS-用户场景的传输功率利用率。该方法优化了终端用户的功率分割（PS）比，并使用了针对每个RIS元件反射率的优化的实用相位相关振幅模型来优化传输功率。提出了基于分数规划的Dinkelbach算法和二次变换相关算法，并与基于KKT条件的解进行了比较。对离散相移（DPS）电平进行了优化求解。数值结果表明，RIS元素越多、间距越近，信息率和EH都得到了提高，但随着DPS水平的增加，信息率和EH趋于饱和。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Communications Letters 工程技术-电信学

CiteScore

8.10

自引率

7.30%

发文量

590

审稿时长

2.8 months

期刊介绍： The IEEE Communications Letters publishes short papers in a rapid publication cycle on advances in the state-of-the-art of communication over different media and channels including wire, underground, waveguide, optical fiber, and storage channels. Both theoretical contributions (including new techniques, concepts, and analyses) and practical contributions (including system experiments and prototypes, and new applications) are encouraged. This journal focuses on the physical layer and the link layer of communication systems.