In this paper a novel constructive multiple access (CoMA) scheme is proposed. The new CoMA technique aligns the superimposed signals to the users constructively to the signal of interest. Accordingly, there is no need to remove it at the receiver using successive interference cancellation (SIC) technique.  In this regard, optimal CoMA precoders are designed for user paring NOMA multiple-input-single-output (MISO) systems.  The results in this paper show that CoMA is an attractive solution for NOMA systems with low number of antennas, and transmission power.

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