Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dynamic Metasurface Antennas for Energy Efficient Massive MIMO Uplink
  Communications   Future wireless communications are largely inclined to deploy a massive
number of antennas at the base stations (BS) by exploiting energy-efficient and
environmentally friendly technologies. An emerging technology called dynamic
metasurface antennas (DMAs) is promising to realize such massive antenna arrays
with reduced physical size, hardware cost, and power consumption. This paper
aims to optimize the energy efficiency (EE) performance of DMAs-assisted
massive MIMO uplink communications. We propose an algorithmic framework for
designing the transmit precoding of each multi-antenna user and the DMAs tuning
strategy at the BS to maximize the EE performance, considering the availability
of the instantaneous and statistical channel state information (CSI),
respectively. Specifically, the proposed framework includes Dinkelbach's
transform, alternating optimization, and deterministic equivalent methods. In
addition, we obtain a closed-form solution to the optimal transmit signal
directions for the statistical CSI case, which simplifies the corresponding
transmission design. The numerical results show good convergence performance of
our proposed algorithms as well as considerable EE performance gains of the
DMAs-assisted massive MIMO uplink communications over the baseline schemes.

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The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
5
The categories of this paper are: gr-qc
7
The categories of this paper are: hep-th
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The categories of this paper are: stat
30
The categories of this paper are: q-alg
24
The categories of this paper are: dg-ga
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
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The categories of this paper are: adap-org
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The categories of this paper are: econ
11
The categories of this paper are: hep-lat
15
The categories of this paper are: nucl-ex