Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Statistical CSI-Based Transmission Design for Reconfigurable Intelligent
  Surface-aided Massive MIMO Systems with Hardware Impairments   We consider a reconfigurable intelligent surface (RIS)-aided massive
multi-user multiple-input multiple-output (MIMO) communication system with
transceiver hardware impairments (HWIs) and RIS phase noise. Different from the
existing contributions, the phase shifts of the RIS are designed based on the
long-term angle informations. Firstly, an approximate analytical expression of
the uplink achievable rate is derived. Then, we use genetic algorithm (GA) to
maximize the sum rate and the minimum date rate. Finally, we show that it is
crucial to take HWIs into account when designing the phase shift of RIS.

21
The categories of this paper are: adap-org
34
The categories of this paper are: chem-ph
22
The categories of this paper are: chao-dyn
6
The categories of this paper are: astro-ph
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
20
The categories of this paper are: acc-phys
32
The categories of this paper are: atom-ph
4
The categories of this paper are: cond-mat
37
The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom
8
The categories of this paper are: hep-ex
36
The categories of this paper are: cmp-lg
12
The categories of this paper are: nucl-th
14
The categories of this paper are: math-ph