Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Hybrid beamforming with dynamic subarrays and low-resolution PSs for
  mmWave MU-MISO systems   Analog/digital hybrid beamforming architectures with large-scale antenna
arrays have been widely considered in millimeter wave (mmWave) communication
systems because they can address the tradeoff between performance and hardware
efficiency compared with traditional fully-digital beamforming. Most of the
prior work on hybrid beamforming focused on fullyconnected architecture or
partially-connected scheme with fixedsubarrays, in which the analog beamformers
are usually realized by infinite-resolution phase shifters (PSs). In this
paper, we introduce a novel hybrid beamforming architecture with dynamic
subarrays and hardware-efficient low-resolution PSs for mmWave multiuser
multiple-input single-output (MU-MISO) systems. By dynamically connecting each
RF chain to a non-overlap subarray via a switch network and PSs, we can exploit
multiple-antenna and multiuser diversities to mitigate the performance loss due
to the use of practical low-resolution PSs. An iterative hybrid beamformer
design algorithm is first proposed based on fractional programming (FP), aiming
at maximizing the sum-rate performance of the MU-MISO system. In an effort to
reduce the complexity, we also present a simple heuristic hybrid beamformer
design algorithm for the dynamic subarray scheme. Extensive simulation results
demonstrate the advantages of the proposed hybrid beamforming architecture with
dynamic subarrays and low-resolution PSs compared to existing fixed-subarray
schemes.

17
The categories of this paper are: q-fin
28
The categories of this paper are: alg-geom
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The categories of this paper are: cmp-lg
3
The categories of this paper are: physics
27
The categories of this paper are: comp-gas
29
The categories of this paper are: funct-an
9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys
8
The categories of this paper are: hep-ex
22
The categories of this paper are: chao-dyn
4
The categories of this paper are: cond-mat
0
The categories of this paper are: hep-ph
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The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
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The categories of this paper are: econ
31
The categories of this paper are: ao-sci