Performance of rectangular QAM/FSO systems using APD receiver over atmospheric turbulence channels

Author

Vu, Bach T. ; Truong, C.T. ; Pham, Anh T. ; Dang, Ngoc T.

Author_Institution

Comput. Commun. Lab., Univ. of Aizu, Aizuwakamatsu, Japan

fYear

2012

fDate

19-22 Nov. 2012

Firstpage

1

Lastpage

5

Abstract

We theoretically analyze the performance of free-space optical (FSO) communication systems using rectangular quadrature amplitude modulation (QAM) and avalanche photodiode (APD) over atmospheric turbulence channels. The log-normal fading channel is used in the analysis. We derive the system´s average symbol error rate (SER) taking into account the APD shot noise and thermal noise, turbulence strengths, channel distances and various system parameters.We find that using APD can greatly benefit the performance of the system in comparison with that of using PIN photodiode. However the selection of APD gain is critical to the system performance. In addition, the optimal value of APD gain also significantly depends on various conditions of the atmospheric turbulence channels.

Keywords

atmospheric turbulence; avalanche photodiodes; fading channels; quadrature amplitude modulation; receivers; APD gain; APD receiver; FSO communication systems; PIN photodiode; SER; atmospheric turbulence channels; avalanche photodiode; channel distances; free-space optical; log-normal fading channel; rectangular QAM/FSO systems; rectangular quadrature amplitude modulation; symbol error rate; thermal noise; turbulence strengths; Adaptive optics; Communication systems; Noise; Optical attenuators; Optical receivers; Quadrature amplitude modulation; Free-space optics (FSO); atmospheric turbulence; avalanche photodiode (APD); quadrature amplitude modulation (QAM);

fLanguage

English

Publisher

ieee

Conference_Titel

TENCON 2012 - 2012 IEEE Region 10 Conference

Conference_Location

Cebu

ISSN

2159-3442

Print_ISBN

978-1-4673-4823-2

Electronic_ISBN

2159-3442

Type

conf

DOI

10.1109/TENCON.2012.6412187

Filename

6412187