Influence of detection noise on the maximum likelihood estimation of atmospheric turbulence fading parameters

doi:10.1364/AO.465458

	Influence of detection noise on the maximum likelihood estimation of atmospheric turbulence fading parameters
	Chen, Dan 1; Gao, Yue 1; Wang, Huiqin 2; Liu, Yuan 1; Cao, Yeqin 1
刊名	APPLIED OPTICS
	2022-08-20
卷号	61 期号:24 页码:7265-7272
ISSN号	1559-128X
DOI	10.1364/AO.465458
英文摘要	Free space optical system design and performance analysis are highly related to channel statistics obtained by the channel parameter estimation. The accurate estimation of the channel parameters and scintillation index needs to consider the photoelectric detection noise at the receiving end. We propose a maximum likelihood (ML) method for estimating the parameters of a gamma-gamma fading channel affected by photoelectric detection noise. The Newton-Raphson method and expectation maximization (EM) algorithm are developed to compute the ML estimates of atmospheric turbulence fading parameters and variance of the detection noise. We also derive the Cramer-Rao bound for the unknown parameters. By way of the mean square estimation errors, our estimation technique performance is compared with existing methods of the estimation which ignore detection noise. Based on the measured channel and detection noise data under three weather conditions, it is verified that the proposed EM algorithm, considering the influence of detection noise, can significantly improve the estimation accuracy of atmospheric turbulence fading parameters. (C) 2022 Optica Publishing Group
WOS研究方向	Optics
语种	英语
出版者	Optica Publishing Group
WOS记录号	WOS:000843576700039
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/159834]
专题	计算机与通信学院
作者单位	1.Xian Univ Technol, Sch Automat & Informat Engn, Xian 710048, Shaanxi, Peoples R China; 2.Lanzhou Univ Technol, Sch Comp & Commun, Lanzhou 730050, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Chen, Dan,Gao, Yue,Wang, Huiqin,et al. Influence of detection noise on the maximum likelihood estimation of atmospheric turbulence fading parameters[J]. APPLIED OPTICS,2022,61(24):7265-7272.
APA	Chen, Dan,Gao, Yue,Wang, Huiqin,Liu, Yuan,&Cao, Yeqin.(2022).Influence of detection noise on the maximum likelihood estimation of atmospheric turbulence fading parameters.APPLIED OPTICS,61(24),7265-7272.
MLA	Chen, Dan,et al."Influence of detection noise on the maximum likelihood estimation of atmospheric turbulence fading parameters".APPLIED OPTICS 61.24(2022):7265-7272.