考虑HPSA的IRS辅助室内VLC系统光源优化

doi:10.19665/j.issn1001-2400.20240103

Abstract

Abstract:

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.

Key words: visible light communication, light emitting diodes, light source optimization, hybrid particle swarm algorithm, intelligent reflecting surface, received optical power, signal to noise ratio

CLC Number:

TN92

HE Huimeng, YANG Ting, SHI Huili, WANG Ping, BING Zhe, WANG Xing, BAI Bo. Optimization of light sources for the IRS-assisted indoor VLC system considering HPSA[J].Journal of Xidian University, 2024, 51(2): 46-55.

Figures/Tables 11

S/m	L/m	w/(°)	ϑ/(°)	θ $1 / 2 1$ /(°)	θ $1 / 2 2$ /(°)	θ $1 / 2 3$ /(°)	θ $1 / 2 4$ /(°)	θ $1 / 2 5$ /(°)	θ $1 / 2 6$ /(°)
0.1	1.6	17.18	15.47	32.63	37.45	39.62	30.46	41.76	43.22
θ $1 / 2 7$ /(°)	θ $1 / 2 8$ /(°)	θ $1 / 2 9$ /(°)	θ $1 / 2 10$ /(°)	θ $1 / 2 11$ /(°)	θ $1 / 2 12$ /(°)	θ $1 / 2 13$ /(°)	θ $1 / 2 14$ /(°)	θ $1 / 2 15$ /(°)	θ $1 / 2 16$ /(°)
40.08	37.73	36.53	42.39	45.52	42.28	34.56	35.56	38.22	31.11

r/m	a/m	b/m	w/(°)	ϑ/(°)	θ $1 / 2 1$ /(°)	θ $1 / 2 2$ /(°)	θ $1 / 2 3$ /(°)	θ $1 / 2 4$ /(°)	θ $1 / 2 5$ /(°)	θ $1 / 2 6$
2.4	0.1	0.4	13.17	38.38	38.22	33.98	32.12	34.55	40.22	45.25
θ $1 / 2 7$ /(°)	θ $1 / 2 8$ /(°)	θ $1 / 2 9$ /(°)	θ $1 / 2 10$ /(°)	θ $1 / 2 11$ /(°)	θ $1 / 2 12$ /(°)	θ $1 / 2 13$ /(°)	θ $1 / 2 14$ /(°)	θ $1 / 2 15$ /(°)	θ $1 / 2 16$ /(°)
39.92	42.89	35.63	45.56	42.36	44.31	35.82	31.89	45.33	36.78

References 19

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参数	符号	数值	参数	符号	数值
P_t/W	LED发射光功率	1	FOV/(°)	接收机视场角	90
A/cm²	接收机有效面积	1	T_s(ϕ)	滤波器增益	1
R/(A·W^-1)	光电转换效率	0.35	G_s(ϕ)	聚光器增益	1
ρ	墙面反射系数	0.8	dA_IRS/cm²	IRS单元反射面积	0.01
ρ_IRS	IRS反射系数	0.95	q/C	电荷量	1.6×10^-19
Γ	信道噪声因子	0.62	I_bg/mA	暗电流值	0.1
g_m/(m·s^-1)	跨导率	30	T/次	最大迭代次数	100

Optimization of light sources for the IRS-assisted indoor VLC system considering HPSA

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