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Show allCOMPARATIVE ANALYSIS OF INTER SATELLITE LINKS USING FREE SPACE OPTICAL COMMUNICATION WITH PPM AND QPSK MODULATION TECHNIQUES IN TURBO CODES
Abstract
Free space optical (FSO) communication systems has received much attention in recent years as a cost-effective, license-free and wide-bandwidth access technique for high data rates applications.A direct line-of-sight (LOS) link offers numerous advantages compared to the conventional wired and radio frequency (RF) wireless communications.However, the performance of FSO communication severely suffers from turbulence-induced fading caused by atmospheric conditions. In this paper the performance of modulation techniques like Pulse Position Modulation (PPM) and Quadrature Phase Shift Keying (QPSK) in Turbo Codesare studied over Additive White Gaussian Noise(AWGN) channel using MATLAB . The performance measures which are represented in this paper are Bit Error Rate (BER) and Signal to Noise Ratio (SNR).
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References
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