Multiuser Detection Using NOMA Technique for FDMC- CDMA System in Fading Channels: An Overview

Non-Orthogonal Multiple Access (NOMA) is an emerging technique which will perform well in 5G
wireless communication system. Multiple users can share the resources which are available in
spectrum and also individual user can be identified easily with the help of Successive Interference
Cancelation (SIC) algorithm. In this paper, the power domain is considered for detection of power
allocation for the base stations. The errors in fading channel is demonstrated with the help of multi
carrier code division multiple access (MC-CDMA), in which the frequency diversity can be resolved
hastily. Due to high range of multiple access interferences the performance of MC-CDMA has been
restricted. A new technique is proposed in this paper, based on Frequency Division - Multi Carrier
Code Division Multiple Access (FD-MC-CDMA) system and the Multiple Access Interference (MAI)
can be greatly reduced by exploiting the available range of frequencies. NOMA principle is used to
enhance the signal strength of proposed system and highly restricted for appearance of MAI at the
receiver end. In this paper, the NOMA based FD-MC-CDMA system; the range of signal strength can
increase for different users in fading channels and reduce the interferences between the users. The
performance of the proposed system can be estimated in terms of Bit error rate (BER) and SNR and
it compares with other existing techniques. The simulation results are carried out using Matlab
software.