Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Beamspace Multidimensional ESPRIT Approaches for Simultaneous
  Localization and Communications   Modern wireless communication systems operating at high carrier frequencies
are characterized by a high dimensionality of the underlying parameter space
(including channel gains, angles, delays, and possibly Doppler shifts).
Estimating these parameters is valuable for communication purposes, but also
for localization and sensing, making channel estimation a critical component in
any joint communication and localization or sensing application. The high
dimensionality make it difficult to use search-based methods such as maximum
likelihood. Search-free methods such as ESPRIT provide an attractive
alternative, but require a complex decomposition step in both the tensor and
matrix version of ESPRIT. To mitigate this, we propose, develop, and analyze a
reduced complexity beamspace ESPRIT method. Complexity is reduced both by
beampace processing as well as low-complex implementation of the singular value
decomposition. A novel perturbation analysis provides important insights for
both channel estimation and localization performance. The proposed method is
compared to the tensor ESPRIT method, in terms of channel estimation,
communication, localization, and sensing performance, further validating the
perturbation analysis.

34
The categories of this paper are: chem-ph
36
The categories of this paper are: cmp-lg
30
The categories of this paper are: q-alg
4
The categories of this paper are: cond-mat
16
The categories of this paper are: stat
5
The categories of this paper are: gr-qc
1
The categories of this paper are: cs
10
The categories of this paper are: q-bio
28
The categories of this paper are: alg-geom
26
The categories of this paper are: bayes-an
33
The categories of this paper are: plasm-ph
32
The categories of this paper are: atom-ph
24
The categories of this paper are: dg-ga
21
The categories of this paper are: adap-org
12
The categories of this paper are: nucl-th
0
The categories of this paper are: hep-ph