Channel correlation in aperture receiver diversity systems for free-space optical communication

被引：34

作者：

Chen, Zhixiao ^{[1
]}

Yu, Song ^{[1
]}

Wang, Tianyi ^{[1
]}

Wu, Guohua ^{[2
]}

Wang, Shaoling ^{[2
]}

Gu, Wanyi ^{[1
]}

机构：

[1] Beijing Univ Posts & Telecommun, State Key Lab Informat Photon & Opt Commun, Beijing 100876, Peoples R China

[2] Beijing Univ Posts & Telecommun, Sch Elect Engn, Beijing 100876, Peoples R China

来源：

JOURNAL OF OPTICS | 2012年 / 14卷 / 12期

基金：

美国国家科学基金会;

关键词：

free-space optical communication; atmospheric turbulence; spatial diversity; channel correlation; SCINTILLATION; BEAM; TRANSMISSION; PERFORMANCE; REDUCTION;

D O I：

10.1088/2040-8978/14/12/125710

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In receiver diversity systems, signal replicas will suffer from channel correlations if there are insufficient spacings for component receivers. Knowledge of the channel correlation is important for system performance assessment and improvement. In this paper, we give a theoretical study of the channel correlation in receiver diversity systems. Based on the plane-wave model and the extended Rytov theory for the ABCD ray-matrix formulation, expressions for the channel correlation are derived under general atmospheric conditions. The effects of antenna spacing, turbulence strength, receiver aperture size, and wavelength are examined in detail and the corresponding physical mechanisms for the results are discussed. An approximation for estimating the channel correlation length under strong turbulence conditions is obtained.

引用

页数：7

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