无线光中继通信在弱湍流时的性能估计方法

陈晓; 胡晓英

doi:10.13756/j.gtxyj.2021.01.012

您当前的位置：

首页 >

文章列表页 >

无线光中继通信在弱湍流时的性能估计方法

无线通信技术

- 无线光中继通信在弱湍流时的性能估计方法
- Approximations to the Performance of Wireless Optical Relaying Communications over Weak Turbulence Channels
- 光通信研究 2021年第1期页码：58-62
- 作者机构：
  
  上海申核能源工程技术有限公司，上海　200233
- 作者简介：
  
  陈晓，工程师。E-mail：chenxiao@snerdi.com.cn
- 基金信息：
  
  国家重大专项大型先进压水堆及高温气冷堆核电站—CAP1400核电厂智能运维关键技术研究资助项目(2019ZX06002022)
- DOI：10.13756/j.gtxyj.2021.01.012
  中图分类号： TN929.12
- 纸质出版日期：2021-02-10，
  
  收稿日期：2020-06-20，
扫描看全文
陈晓, 胡晓英. 无线光中继通信在弱湍流时的性能估计方法[J]. 光通信研究, 2021,(1):58-62.

CHEN Xiao, HU Xiao-ying. Approximations to the Performance of Wireless Optical Relaying Communications over Weak Turbulence Channels[J]. Study on Optical Communications, 2021,(1):58-62.
陈晓, 胡晓英. 无线光中继通信在弱湍流时的性能估计方法[J]. 光通信研究, 2021,(1):58-62. DOI： 10.13756/j.gtxyj.2021.01.012.

CHEN Xiao, HU Xiao-ying. Approximations to the Performance of Wireless Optical Relaying Communications over Weak Turbulence Channels[J]. Study on Optical Communications, 2021,(1):58-62. DOI： 10.13756/j.gtxyj.2021.01.012.

摘要

对数正态信道是描述弱湍流条件下无线光通信衰落的有力数学工具。然而精确的对数正态信道性能表达式带有无法化简的多重积分，难以揭示信道参数和性能的联系，不利于性能估计。针对该问题，Wilkinson和Fenton近似被广泛应用于对数正态信道的性能分析，但Wilkinson和Fenton近似的应用范围却缺乏标准，这导致了系统设计时对理论性能的错误预判。为此，文章基于原点矩的积分表达式讨论了Wilkinson和Fenton近似的特点，提出了基于Wilkinson和Fenton近似来估计自由空间光通信中继性能的方法，对比了Wilkinson和Fenton近似在此类性能分析中的适用范围。仿真结果表明，在中低信噪比情况下，Wilkinson比Fenton近似更准确；在高信噪比情况下，Fenton比Wilkinson近似更精确。此外，仿真结果还表明，Wilkinson近似方法的精度和对数正态信道的方差密切相关。

Abstract

Lognormal channel is a powerful mathematical tool in modeling fading effects for wireless optical communications over weak turbulence channels. However

exact analysis involving lognormal channels involves multi-fold integrals

which reveal little insights into the relation between the system performance and the channel parameters. Therefore

Wilkinson Approximation (WA) and Fenton Approximation (FA) are widely applied to approximate the performance of lognormal fading channels. However

their ranges of applications are not fully studied

which causes discrepancies in performance evaluations. In this work

we compare WA and FA based on the expressions of moments

and propose an approach to approximate the performance of Free-Space Optical Communications (FSO) relaying systems over the lognormal weak turbulence channels

and discuss the ranges of applications for WA and FA. It is shown that at low and medium Signal-to-Noise Ratio (SNR)

error probability approximation based on WA is more accurate. However

at large SNR

Fenton’s approach will provide better approximation accuracy compared to the WA. Simulation results indicate that the approximation error depends on the discrepancies between the variances over FSO links as well as the scintillation level of the channels.

关键词

自由空间激光通信性能分析湍流信道对数正态信道

Keywords

free-spacelaser communicationsperformance analysisturbulence channelslognormal channels

references

Zhu X M, Kahn J M. Free-Space Optical Communication through Atmospheric Turbulence Channels[J]. IEEE Transactions on Communications, 2002, 50(8): 1293-1300.

Zhu B, Cheng J, Yan J, et al. A New Asymptotic A-nalysis Technique for Diversity Receptions over Correlated Lognormal Fading Channels[J]. IEEE Transactions on Communications, 2018, 66(2): 845-861.

Zhu B, Cheng J, Alouini M S, et al. Relay Placement for FSO Multi-Hop DF Systems with Link Obstacles and Infeasible Regions[J]. IEEE Transactions on Wireless Communications, 2015, 14(9): 5240-5250.

Beaulieu N C, Soliman S S. Exact Analysis of Multihop Amplify and Forward Relaying Systems over General Fading Links[J]. IEEE Transactions on Communications, 2012, 60(8): 2123-2134.

Safari M, Uysal M. Relay-Assisted Free-Space Optical Communication[J]. IEEE Transactions on Wireless Communications, 2008, 7(12): 5441-5449.

Navidpour S M, Uysal M, Kavehrad M. BER Performance of Free-Space Optical Transmission with Spatial Diversity[J]. IEEE Transactions on Wireless Communications, 2007, 6(8): 2813-2819.

Schwartz S C, Yeh Y. On the Distribution Function and Moments of Power Sums with Log-Normal Components[J]. Bell System Technical Journal, 1982, 61(7): 1441-1462.

Fenton L. The Sum of Log-Normal Probability Distributions in Scatter Transmission Systems[J]. IRE Transactions on Communications Systems, 1960, 8(1): 57-67.

Haas S M. Capacity of and Coding for Multiple-Aperture, Wireless, Optical Communications[D]. USA: Massachusetts Institute of Technology, 2013.

Graziosi F, Pratesi M, Ruggieri M, et al. An Improved Analysis of Outage Probability with Correlated Co-Channel Interferers[C]//IEEE Global Telecommunications Conference. Sydney, NewSouth Wales: IEEE, 1998: 3710-3715.

Pratesi M, Santucci F, Graziosi F, et al. Outage Analysis in Mobile Radio Systems with Generically Correlated Log-Normal Interferers[J]. IEEE Transactions on Communications, 2000, 48(3): 381-385.

Pratesi M, Santucci F, Graziosi F. Generalized Moment Matching for the Linear Combination of Lognormal Rvs: Application to Outage Analysis in Wireless Systems[J]. IEEE Transactions on Wireless Communications, 2006, 5(5): 1122-1132.

Wang Z, Giannakis G B. A Simple and General Parameterization Quantifying Performance in Fading Channels[J]. IEEE Transactionson Communications, 2003, 51(8): 1389-1398.

Zhu B. Asymptotic Performance of Composite Lognormal-X Fading Channels[J]. IEEE Transactions on Communications, 2018, 66(12): 6570-6585.

更多指标>

浏览量

下载量

CSCD

文章被引用时，请邮件提醒。

提交

工具集

关联资源

40 Gbit/s光纤传输系统中先进调制格式的性能分析

TD-SCDMA系统频偏估计算法

WCDMA随机接入信道的数学建模及性能分析

自相似环流网状网性能分析