可见光辅助中继通信系统与功率分配方案

doi:10.19665/j.issn1001-2400.2020.01.014

Abstract

Abstract:

When the indoor visible light communication link is interrupted due to occlusion blocking, the signal needs to be forwarded through the auxiliary relay, and therefore, an indoor visible light communication auxiliary relay system model is established. First, the positional constraint relationship of indoor light source on the roof when there is link blockage in the indoor visible light communication system is analyzed by using the office ceiling light as the signal light source and relay, and the asymmetrically multiplexing DC offset optical orthogonal frequency division multiplexing is used to realize the auxiliary relay signal multiplexing, which ensures the occlusion signal relay transmission while maintaining its target terminal. Then the genetic algorithm is used to optimize the distribution of the power at the source and the relay to optimize the system performance, and the BER performance of the equal power allocation scheme is compared in the occlusion case. The results show that when the direct communication link is blocked, the system loss of the auxiliary relay system with the optimal power allocation scheme is 3 dB less than the system with equal power allocation.

Key words: visible light communication, asymmetrically clipped DC biased optical offset frequency division multiplexing, power allocation, genetic algorithm

CLC Number:

TN92

XIE Fan,FENG Lifang. Visible light assisted relay communication system and a power allocation scheme[J].Journal of Xidian University, 2020, 47(1): 95-103.

Figures/Tables 9

References 19

[1]	NA Z, WANG Y, XIONG M , et al. Modeling and Throughput Analysis of an ADO-OFDM Based Relay-assisted VLC System for 5G Networks[J]. IEEE Access, 2018,6:17586-17594.
[2]	BURCHARDT H, SERAFIMOVSKI N, TSONEV D , et al. VLC: Beyond Point-to-point Communication[J]. IEEE Communications Magazine, 2014,52(7):98-105.
[3]	迟楠, 卢星宇, 王灿 , 等. 基于LED的高速可见光通信[J]. 中国激光, 2017,44(3):1-12.
	CHI Nan, LU Xingyu, WANG Can , et al. High-speed Visible Light Communication Based on LED[J]. Chinese Journal of Lasers, 2017,44(3):1-12.
[4]	WANG Z, WANG Q, CHEN S , et al. An Adaptive Scaling and Biasing Scheme for OFDM-based Visible Light Communication Systems[J]. Optics Express, 2014,22(10):12707-12715.
[5]	ARMSTRONG J, LOWERY A J . Power Efficient Optical OFDM[J]. Electronics Letters, 2006,42(6):370-372.
[6]	CARRUTHERS J B, KAHN J M . Multiple-subcarrier Modulation for Non-directed Wireless Infrared Communication[J]. IEEE Journal on Selected Areas in Communications, 1996,14(3):538-546.
[7]	CHEN H, HU S, DING J , et al. Performance Comparison of Visible Light Communication Systems Based on ACO-OFDM, DCO-OFDM and ADO-OFDM[C]//Proceedings of the 2017 16th International Conference on Optical Communications and Networks. Piscataway: IEEE, 2017: 1-3.
[8]	DISSANAYAKE S D, ARMSTRONG J . Comparison of ACO-OFDM, DCO-OFDM and ADO-OFDM in IM/DD Systems[J]. Journal of Lightwave Technology, 2013,31(7):1063-1072.
[9]	DUNG L T, JO S, AN B . VLC Based Multi-hop Audio Data Transmission System[C]//Lecture Notes in Computer Science: 7861. Heidelberg: Springer Verlag, 2013: 880-885.
[10]	CHOWDHURY H, KATZ M . Cooperative Multihop Connectivity Performance in Visible Light Communications[C]//Proceedings of the 2013 6th IFIP/IEEE Wireless Days. Washington: IEEE Computer Society, 2013: 6686444.
[11]	FENG L, HU R Q, WANG J , et al. Deployment Issues and Performance Study in a Relay-assisted Indoor Visible Light Communication System[J]. IEEE Systems Journal, 2019,13(1):562-570.
[12]	BAI R, JIANG R, MAO T , et al. Iterative Receiver for ADO-OFDM with Near-optimal Optical Power Allocation[J]. Optics Communications, 2017,387:350-356.
[13]	UYSAL M, MIRAMIRKHANI F, NARMANLIOGLU O , et al. IEEE 802.15.7r1 Reference Channel Models for Visible Light Communications[J]. IEEE Communications Magazine, 2017,55(1):212-217.
[14]	LANEMAN J N, TSE D N C, WORNELL G W . Cooperative Diversity in Wireless Networks: Efficient Protocols and Outage Behavior[J]. IEEE Transactions on Information Theory, 2004,50(12):3062-3080.
[15]	CHO K, YOON D . On the General BER Expression of One- and Two-dimensional Amplitude Modulations[J]. IEEE Transactions on Communications, 2002,50(7):1074-1080.
[16]	黄立新 . 可见光通信系统容量分析与功率分配[D]. 南京: 东南大学, 2018.
[17]	DAI X, ZHANG J, ZHANG Q . Multi-relay Selection in Decode-and-forward Cooperative Network Based on Genetic Algorithm[C]//Proceedings of the 2015 2nd International Conference on Information Science and Control Engineering. Piscataway: IEEE, 2015: 834-837.
[18]	YUEN S Y, CHOW C K . A Genetic Algorithm That Adaptively Mutates and Never Revisits[J]. IEEE Transactions on Evolutionary Computation, 2009,13(2):454-472.
[19]	SANTIAGO R M C, JOSE J A, BANDALA A A , et al. Multiple Objective Optimization of LED Lighting System Design Using Genetic Algorithm[C]//Proceedings of the 2017 5th International Conference on Information and Communication Technology. Piscataway: IEEE, 2017: 8074698.

性能参数指标		参数值
中心发光强度/lx		900
光源S₁位置/m		(1.25,1.25,3)
发射机R₁位置/m		(-1.25,1.25,3)
光源S₂位置/m		(-1.25,-1.25,3)
发射机R₂位置/m		(1.25,1.25,3)

信号功率/mW	4QAM		16QAM		64QAM
信号功率/mW	K_S	K_R	K_S	K_R	K_S	K_R
1	0.436 876	0.318 916	0.439 656	0.333 124	0.454 312	0.379 907
5	0.423 448	0.301 233	0.429 348	0.315 507	0.441 563	0.368 393
10	0.411 875	0.282 831	0.426 487	0.299 296	0.435 625	0.356 641
15	0.384 340	0.266 483	0.421 261	0.291 798	0.429 718	0.343 750
20	0.380 153	0.264 887	0.420 277	0.288 361	0.425 384	0.326 563
25	0.375 749	0.257 735	0.418 469	0.282 926	0.419 841	0.309 375
30	0.373 128	0.255 938	0.405 636	0.282 500	0.418 976	0.309 184

性能参数指标			参数值		性能参数指标				参数值
房屋	反射系数	墙壁,天花板		0.8	遮挡物	高度/m	1.8
房屋	反射系数	地面		0.3	遮挡物	位置/m	(0.5,1.2,0)
发射机	半功率角Φ/(°)			70	接收机	有效接收面积A/cm²				1
	位置/m	S₁		(1.25,1.25,3)	接收机	接收机高度h_d/m					0.7
		R₁		(-1.25,1.25,3)	视场角/(°)					85
		S₂		(-1.25,-1.25,3)	位置/m			D₁		(0,1.2,0.7)
		R₂		(1.25,1.25,3)	位置/m			D₂		(-1.2,1.2,0.7)
载波数N			256		总功率/mW				1000
循环前缀的长度N_g			32		噪声功率σ/mW				1

Visible light assisted relay communication system and a power allocation scheme

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