Resource optimization for cooperative SWIPT-NOMA systems with imperfect SIC

IF 3 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Aeu-International Journal of Electronics and Communications Pub Date : 2024-09-06 DOI:10.1016/j.aeue.2024.155517

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Abstract

This paper investigates a cooperative non-orthogonal multiple access (NOMA) system designed for multiple users. It integrates simultaneous wireless information and power transfer (SWIPT) while accounting for the imperfections in successive interference cancellation (SIC). In this scenario, a nearby user functions as a relay for a more distant user. Through the utilization of a power splitting (PS) protocol, the nearby user adeptly manages both energy harvesting and decoding signals from users. A user pairing strategy is employed, aiming to guarantee a significant contrast in channel gains between users within each pair. Subsequently, the power allocation coefficients and PS factor for each cluster are derived to optimize the performance of nearby users and amplify the overall system throughput. This optimization takes into account the individual target rates of each user while accommodating the presence of imperfect SIC. Numerical results affirm the enhanced performance of the nearby user, showcasing greater system throughput and minimal outage probability compared to existing schemes, even in the presence of imperfect SIC.

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具有不完善 SIC 的 SWIPT-NOMA 合作系统的资源优化

本文研究了一种为多用户设计的合作式非正交多址（NOMA）系统。该系统集成了同步无线信息和功率传输（SWIPT），同时考虑了连续干扰消除（SIC）的不完善之处。在这种情况下，附近的用户充当较远用户的中继站。通过使用功率分配（PS）协议，附近的用户可以很好地管理能量收集和解码来自用户的信号。采用用户配对策略，目的是保证每对用户之间的信道增益差异显著。随后，推导出每个群组的功率分配系数和 PS 因子，以优化附近用户的性能，并扩大整个系统的吞吐量。这种优化既考虑到了每个用户的目标速率，又兼顾了不完美 SIC 的存在。数值结果证实了附近用户性能的增强，与现有方案相比，即使在不完善的 SIC 存在的情况下，也能显示出更大的系统吞吐量和最小的中断概率。

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

Aeu-International Journal of Electronics and Communications 工程技术-电信学

CiteScore

6.90

自引率

18.80%

发文量

292

审稿时长

4.9 months

期刊介绍： AEÜ is an international scientific journal which publishes both original works and invited tutorials. The journal''s scope covers all aspects of theory and design of circuits, systems and devices for electronics, signal processing, and communication, including: signal and system theory, digital signal processing network theory and circuit design information theory, communication theory and techniques, modulation, source and channel coding switching theory and techniques, communication protocols optical communications microwave theory and techniques, radar, sonar antennas, wave propagation AEÜ publishes full papers and letters with very short turn around time but a high standard review process. Review cycles are typically finished within twelve weeks by application of modern electronic communication facilities.