Performance analysis of channel coding in satellite communication based on VSAT Network and MC-CDMA scheme

摘要

Satellites are an essential part of our daily life, and they have a very large usage ranging from Search and Rescue Operations to Environmental Monitoring. The widest use of satellites is, however, in communication systems. Satellites can cover vast areas on the world; therefore, they are the nodes where all links pass through in a communications network. Many users can access such a network simultaneously while they are widely separated geographically. The purpose of this paper is to model and analyze a geostationary satellite communication system with VSATs networks in the uplink case, using Multicarrier CDMA system (MC-CDMA is a combination of multicarrier modulation scheme and CDMA concepts) and channel coding mechanisms "Turbo code and Convolutional code". The envisaged system is examined in Ku band and over AWGN channel. The simulation results are obtained for each different case. The performance of the system is given in terms of Bit Error Rate (BER) and Signal to Noise Ratio (SNR). In this study the proposed system coded with Turbo code can achieve better error rate performance compared to coded VSAT MC-CDMA system with convolutional code.