Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Comparison Study between NOMA and SCMA   In this paper, the performance and system complexity of the candidate
multiple access (MA) techniques for the next generation of cellular systems,
namely, non-orthogonal multiple access (NOMA) (in this paper, we consider power
domain MA as NOMA) and sparse code multiple access (SCMA), are investigated. To
this end, for each MA technique, a resource allocation problem considering
heterogeneous cellular networks (HetNet) is formulated. We apply successive
convex approximation (SCA) method to each problem and obtain their solutions.
The simulation results show that SCMA-based system achieves better performance
than NOMA-based one at the cost of more complexity.

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The categories of this paper are: plasm-ph
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The categories of this paper are: alg-geom
11
The categories of this paper are: hep-lat
8
The categories of this paper are: hep-ex
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The categories of this paper are: q-bio
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The categories of this paper are: comp-gas
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The categories of this paper are: acc-phys
3
The categories of this paper are: physics
12
The categories of this paper are: nucl-th
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The categories of this paper are: supr-con
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The categories of this paper are: bayes-an
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The categories of this paper are: econ
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The categories of this paper are: cmp-lg
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The categories of this paper are: mtrl-th
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The categories of this paper are: dg-ga
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The categories of this paper are: patt-sol