Approximations to the Performance of Wireless Optical Relaying Communications over Weak Turbulence Channels

CHEN Xiao; HU Xiao-ying

doi:10.13756/j.gtxyj.2021.01.012

您当前的位置：

首页 >

文章列表页 >

Approximations to the Performance of Wireless Optical Relaying Communications over Weak Turbulence Channels

- Approximations to the Performance of Wireless Optical Relaying Communications over Weak Turbulence Channels
- Study on Optical Communications Issue 1, Pages: 58-62(2021)
- 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：
- 基金信息：
- DOI：10.13756/j.gtxyj.2021.01.012
  CLC： TN929.12
- Published：10 February 2021，
  
  Received：20 June 2020，
扫描看全文
CHEN Xiao, HU Xiao-ying. Approximations to the Performance of Wireless Optical Relaying Communications over Weak Turbulence Channels. [J]. Study on Optical Communications (1):58-62(2021)
DOI：

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

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Performance analysis of advanced modulation formats in 40 Gbit/s fiber-optic transmission systems

Frequency offset estimation algorithm for TD-SCDMA systems

Mathematical modeling and performance analysis of random access channel in WCDMA networks

Performance analysis of self-similar circumfluent network

Related Author

No data

Related Institution

School of Electronic and Information Engineering, Lanzhou Jiaotong University

College of Information Engineering,PLA Information Engineering University

解放军信息工程大学信息工程学院河南郑州450002

Dept.of Basic Sciences of Beijing Institute of Civil Engineering and Architecture

FiberHome Technologies College,Wuhan Research Institute of Post and Telecommunications

⁰