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EFFECT OF ATMOSPHERIC TURBULENCE ON ACQUISITION TIME OF GROUND TO DEEP SPACE OPTICAL COMMUNICATION SYSTEM

Hemani, Kaushal and Jain, V.K. and Subrat, Kar (2009) EFFECT OF ATMOSPHERIC TURBULENCE ON ACQUISITION TIME OF GROUND TO DEEP SPACE OPTICAL COMMUNICATION SYSTEM. [Citation Index Journal]

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Abstract

The performance of ground to deep space optical communication systems is degraded by distortion of the beam as it propagates through the turbulent atmosphere. Turbulence causes fluctuations in the intensity of the received signal which ultimately affects the acquisition time required to acquire and locate the space-borne target using narrow laser beam. In this paper, performance of free-space optical (FSO) communication system in atmospheric turbulence has been analyzed in terms of acquisition time for coherent and non-coherent modulation schemes. Numerical results presented in graphical and tabular forms show that the acquisition time increases with the increase in turbulence level. This is true for both schemes. The BPSK has lowest acquisition time among all schemes. In non-coherent schemes, M-PPM performs better than the other schemes. With the increase in M, acquisition time becomes lower, but at the cost of increase in system complexity.

Item Type:Citation Index Journal
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering
Departments / MOR / COE:Departments > Electrical & Electronic Engineering
ID Code:753
Deposited By: Prof. Virander Kumar Jain
Deposited On:16 Mar 2010 02:10
Last Modified:19 Jan 2017 08:25

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