Design And Analysis Of Ultra High Capacity DWDM System With And Without Square Root Module For Different Modulation Formats
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Abstract
In this paper, an ultra high capacity Inter satellite Optical Wireless Communication system (IsOWC) is simulated with and without square root module for different advanced modulation formats. The system is proposed by using 64 channels dense wavelength division multiplexing. For various input powers, the inter satellite link has been designed for external modulation of carrier suppressed return-to-zero(CSRZ), duo binary return-to-zero(DRZ), and modified duo binary return-to-zero(MDRZ) at different bit rate. The system is simulated without square root module at 10, 20 and 40Gbps and only at 40Gbps with square root module. The performance parameters Q-factor, eye diagram, received power are obtained for different bit rates to decide which modulation format is best. Results at 10 and 20Gbps shows that the CSRZ modulation performs better than the other two modulations but at 40Gbps MDRZ modulation performs the best. The results of previous system are only compared at 40Gbps with the new system which includes square root module and comparison shows that MDRZ still have the best performance but the performance of DRZ is very much enhanced as compared to without square root at 40Gbps.
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