WSEAS Transactions on Communications
Print ISSN: 1109-2742, E-ISSN: 2224-2864
Volume 14, 2015
Performance Evaluation of VSAT MC-CDMA System Using MUD in Frequency Selective Environments
Authors: , , ,
Abstract: In this paper the bit error rate performance of a satellite communication system based on Very Small Aperture Terminal (VSAT) technology and Multi-Carrier Code Division Multiple Access (MC-CDMA) scheme is investigated in frequency selective environments. The Multiple Access Interference (MAI) is a factor, which limits the capacity and performance of CDMA systems and in order to deal with this problem, the Multi-User Detection (MUD) techniques are proposed to compensate the MAI effect in the designed communication system. In this work, the uplink of VSAT MC-CDMA system is considered and the BER performance of Multiuser detection techniques will be compared to that of Single User Detection (SUD) schemes. The non-linear interference cancellation receivers are used in our simulations, because they have received a great deal of attention due to its advantages when compared with the other multi-user detectors. In this study we investigate different approaches concerning the combination of linear MMSE approach with non-linear interference cancellation schemes. The simulation results analysis of VSAT MC-CDMA system revealed that the receivers formed by the combination of linear MMSE approach and interference cancellation detectors can provide a considerable performance gain compared to interference cancellation schemes and SUD techniques. In addition, the combination of MMSE detector with non-linear interference cancellation schemes shows excellent performance even for high system loads.
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Pages: 96-107
WSEAS Transactions on Communications, ISSN / E-ISSN: 1109-2742 / 2224-2864, Volume 14, 2015, Art. #13