  This paper introduces new approaches for combining non-orthogonal multiple
access with distributed antenna systems. The study targets a minimization of
the total transmit power in each cell, under user rate and power multiplexing
constraints. Several new suboptimal power allocation techniques are proposed.
They are shown to yield very close performance to an optimal power allocation
scheme. Also, a new approach based on mutual successive interference
cancellation of paired users is proposed. Different techniques are designed for
the joint allocation of subcarriers, antennas, and power, with a particular
care given to maintain a moderate complexity. The coupling of non-orthogonal
multiple access to distributed antenna systems is shown to greatly outperform
any other combination of orthogonal/non-orthogonal multiple access schemes with
distributed or centralized deployment scenarios.
