Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: MIMO-NOMA Networks Relying on Reconfigurable Intelligent Surface: A
  Signal Cancellation Based Design   Reconfigurable intelligent surface (RIS) technique stands as a promising
signal enhancement or signal cancellation technique for next generation
networks. We design a novel passive beamforming weight at RISs in a
multiple-input multiple-output (MIMO) non-orthogonal multiple access (NOMA)
network for simultaneously serving paired users, where a signal cancellation
based (SCB) design is employed. In order to implement the proposed SCB design,
we first evaluate the minimal required number of RISs in both the diffuse
scattering and anomalous reflector scenarios. Then, new channel statistics are
derived for characterizing the effective channel gains. In order to evaluate
the network's performance, we derive the closed-form expressions both for the
outage probability (OP) and for the ergodic rate (ER). The diversity orders as
well as the high-signal-to-noise (SNR) slopes are derived for engineering
insights. The network's performance of a finite resolution design has been
evaluated. Our analytical results demonstrate that: i) the inter-cluster
interference can be eliminated with the aid of large number of RIS elements;
ii) the line-of-sight of the BS-RIS and RIS-user links are required for the
diffuse scattering scenario, whereas the LoS links are not compulsory for the
anomalous reflector scenario.

29
The categories of this paper are: funct-an
28
The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
31
The categories of this paper are: ao-sci
36
The categories of this paper are: cmp-lg
7
The categories of this paper are: hep-th
12
The categories of this paper are: nucl-th
13
The categories of this paper are: quant-ph
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
32
The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con
3
The categories of this paper are: physics
34
The categories of this paper are: chem-ph
26
The categories of this paper are: bayes-an