Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dynamic Metasurface Antennas for MIMO-OFDM Receivers with Bit-Limited
  ADCs   The combination of orthogonal frequency modulation (OFDM) and multiple-input
multiple-output (MIMO) systems plays an important role in modern communication
systems. In order to meet the growing throughput demands, future MIMO-OFDM
receivers are expected to utilize a massive number of antennas, operate in
dynamic environments, and explore high frequency bands, while satisfying strict
constraints in terms of cost, power, and size. An emerging technology to
realize massive MIMO receivers of reduced cost and power consumption is based
on dynamic metasurface antennas (DMAs), which inherently implement controllable
compression in acquisition. In this work we study the application of DMAs for
MIMO-OFDM receivers operating with bit-constrained analog-to-digital converters
(ADCs). We present a model for DMAs which accounts for the configurable
frequency selective profile of its metamaterial elements, resulting in a
spectrally flexible hybrid structure. We then exploit previous results in
task-based quantization to show how DMAs can be configured to improve recovery
in the presence of constrained ADCs, and propose methods for adjusting the DMA
parameters based on channel state information. Our numerical results
demonstrate that the DMA-based receiver is capable of accurately recovering
OFDM signals. In particular, we show that by properly exploiting the spectral
diversity of DMAs, notable performance gains are obtained over existing designs
of conventional hybrid architectures, demonstrating the potential of DMAs for
MIMO-OFDM setups in realizing high performance massive antenna arrays of
reduced cost and power consumption.

7
The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
21
The categories of this paper are: adap-org
14
The categories of this paper are: math-ph
3
The categories of this paper are: physics
26
The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
25
The categories of this paper are: patt-sol
0
The categories of this paper are: hep-ph
13
The categories of this paper are: quant-ph
32
The categories of this paper are: atom-ph
22
The categories of this paper are: chao-dyn
36
The categories of this paper are: cmp-lg
35
The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex
24
The categories of this paper are: dg-ga