首页|考虑HPSA的IRS辅助室内VLC系统光源优化

考虑HPSA的IRS辅助室内VLC系统光源优化

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  • 国家科技期刊平台
  • NETL
  • NSTL
  • 万方数据
  • 维普
针对可见光通信(VLC)系统中接收平面光功率分布不均匀的问题,提出了一种基于混合粒子群算法(HPSA)的智能反射面(IRS)辅助室内 VLC系统光源优化设计方案.以 16 个发光二极管(LED)的矩形和混合型布局为例,设置接收光功率方差为适应度函数,将所提出的 HPSA与 IRS技术相结合,对 LED的位置布局、半功率角以及 IRS的偏航角与滚转角进行优化.仿真对比了初始的(未经优化)、基于 HPSA优化的室内 VLC系统,以及基于 HPSA优化的IRS辅助VLC系统的性能.结果表明,在考虑一次反射链路的情况下,与初始的 VLC系统相比,采用 HPSA优化的系统在两种光源布局下的接收光功率以及信噪比波动都明显降低;基于 HPSA优化的IRS辅助室内VLC系统在矩形布局下对接收光功率波动的改善与基于 HPSA优化的 VLC系统效果相当,其在混合型布局下明显低于仅采用 HPSA优化的 VLC系统的光功率波动.3 种可见光通信系统中,基于 HPSA 优化的 IRS 辅助 VLC 系统的平均接收光功率最大.此外,上述 3 种 VLC系统采用混合型布局的平均均方时延拓展性能均优于矩形布局.研究工作对室内可见光通信系统光源分布研究具有一定参考价值.
Optimization of light sources for the IRS-assisted indoor VLC system considering HPSA
Aiming at the problem of unevenness of optical power distribution on the receiving plane in a visible light communication(VLC)system,a light source optimization method for an intelligent reflecting surface(IRS)-assisted indoor VLC system based on the hybrid particle swarm algorithm(HPSA)is proposed.Taking the two layout schemes of rectangular and hybrid arrangements with 16 light-emitting diodes(LEDs)as examples,the variance of received optical power on the receiving plane is set as the fitness function,and the proposed HPSA is combined with the IRS technology to optimize the half-power angle and positional layout of LEDs as well as the yaw and roll angles of IRS.Subsequently,initial(unoptimized)optimization using the HPSA,and optimization using the HPSA for the IRS-aided VLC systems are simulated and compared.The results indicate that when considering the first reflection link,compared to the original VLC system,the fluctuations of received optical power and signal-to-noise ratio of the VLC system optimized with the HPSA significantly decrease for both light source layouts;the HPSA optimized IRS-aided indoor VLC system improves the received optical power fluctuations in the rectangular layout as well as the HPSA optimized VLC system,and its performance is significantly better than that of the HPSA optimized VLC system only in the hybrid layout for optical power fluctuations improvement.Among the three VLC systems,the IRS-aided VLC system based on HPSA optimization has the largest average received optical power.Besides,the average root mean square delay spread performance of the above three VLC systems using a hybrid layout is better than that of a rectangular layout.This work will benefit the study of light source distribution in indoor VLC systems.

visible light communicationlight emitting diodeslight source optimizationhybrid particle swarm algorithmintelligent reflecting surfacereceived optical powersignal to noise ratio

何慧萌、杨婷、施会丽、王平、邴喆、王星、白勃

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西安电子科技大学 通信工程学院,陕西 西安 710071

中煤能源研究院有限责任公司,陕西 西安 710000

可见光通信系统 发光二极管 光源优化 混合粒子群算法 智能反射面 接收光功率 信噪比

国家自然科学基金陕西省重点研发计划

620713652022GY-103

2024

10.19665/j.issn1001-2400.20240103

西安电子科技大学学报(自然科学版)
西安电子科技大学

西安电子科技大学学报(自然科学版)

CSTPCD北大核心
影响因子：0.837
ISSN：1001-2400
年,卷(期)：2024.51(2)
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